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class-wp-optimize-minify-print.php������������������������������������������������������������������0000644�����������������00000016377�15162435531�0013312 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������<?php
if (!defined('ABSPATH')) die('No direct access allowed');

if (!class_exists('WP_Optimize_Minify_Functions')) {
	include WP_OPTIMIZE_MINIFY_DIR.'/class-wp-optimize-minify-functions.php';
}

class WP_Optimize_Minify_Print {

	/**
	 * Load the script using loadAsync JavaScript
	 *
	 * @param string  $href
	 * @param boolean $print
	 * @return string|void
	 */
	public static function async_script($href, $print = true) {
		$wpo_minify_options = wp_optimize_minify_config()->get();
		$tag = '<script>' . "\n";
		$user_agent = isset($_SERVER['HTTP_USER_AGENT']) ? sanitize_text_field(wp_unslash($_SERVER['HTTP_USER_AGENT'])) : '';
		$tag .= 'var wpo_server_info_js = ' . wp_json_encode(array("user_agent" => $user_agent)) . "\n";

		$exclude_js_from_page_speed_tools = $wpo_minify_options['exclude_js_from_page_speed_tools'];
		$enable_defer_js = $wpo_minify_options['enable_defer_js'];
		$is_conditional_loading = $exclude_js_from_page_speed_tools && 'all' !== $enable_defer_js;
		if ($is_conditional_loading) {
			$tag .= 'if (!(navigator.userAgent + " " + wpo_server_info_js.user_agent).match(/' . implode("|", $wpo_minify_options['ualist']) .'/i)) {' . "\n";
		}
		$tag .= "    loadAsync('$href', null);" . "\n";
		if ($is_conditional_loading) {
			$tag .= '}';
		}
		$tag .= '</script>' . "\n";

		if ($print) {
			echo $tag; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- Output is already escaped
		} else {
			return $tag;
		}
	}

	/**
	 * Print a style that will be loaded async using 'preload'
	 *
	 * @param string $href
	 * @param string $media
	 * @return void
	 */
	public static function async_style($href, $media = 'all') {
		// phpcs:disable WordPress.WP.EnqueuedResources.NonEnqueuedStylesheet -- Not applicable for this function
		echo '<link rel="preload" href="'.esc_url($href).'" as="style" media="'.esc_attr($media).'" onload="this.onload=null;this.rel=\'stylesheet\'">' . "\n";
		// fix for firefox not supporting preload
		echo '<link rel="stylesheet" href="'.esc_url($href).'" media="'.esc_attr($media).'">' . "\n";
		echo '<noscript><link rel="stylesheet" href="'.esc_url($href).'" media="'.esc_attr($media).'"></noscript>' . "\n";
		echo '<!--[if IE]><link rel="stylesheet" href="'.esc_url($href).'" media="'.esc_attr($media).'"><![endif]-->' . "\n";
		// phpcs:enable
	}

	/**
	 * Print a style that will be loaded by JS
	 *
	 * @param string $href
	 * @return void
	 */
	public static function exclude_style($href) {
		$wpo_minify_options = wp_optimize_minify_config()->get();
		// make a stylesheet, hide from PageSpeedIndex
		$cssguid = 'wpo_min'.hash('adler32', $href);
		$tag = '<script>' . "\n";
		$user_agent = isset($_SERVER['HTTP_USER_AGENT']) ? sanitize_text_field(wp_unslash($_SERVER['HTTP_USER_AGENT'])) : '';
		$tag .= 'var wpo_server_info_css = ' . wp_json_encode(array("user_agent" => $user_agent)) . "\n";

		$exclude_css_from_page_speed_tools = $wpo_minify_options['exclude_css_from_page_speed_tools'];
		if ($exclude_css_from_page_speed_tools) {
			$tag .= 'if (!(navigator.userAgent + " " + wpo_server_info_css.user_agent).match(/'.implode('|', $wpo_minify_options['ualist']).'/i)){' . "\n";
		}
		$tag .= '    var '.$cssguid.'=document.createElement("link");'.$cssguid.'.rel="stylesheet",'.$cssguid.'.type="text/css",'.$cssguid.'.media="async",'.$cssguid.'.href="'.$href.'",'.$cssguid.'.onload=function() {'.$cssguid.'.media="all"},document.getElementsByTagName("head")[0].appendChild('.$cssguid.');' . "\n";
		if ($exclude_css_from_page_speed_tools) {
			$tag .= '}';
		}
		$tag .= '</script>' . "\n";
		echo $tag; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- Output is already escaped
	}

	/**
	 * Inline a single style
	 *
	 * @param string $handle
	 * @param string $href
	 * @return boolean
	 */
	public static function inline_style($handle, $href) {
		$wpo_minify_options = wp_optimize_minify_config()->get();

		// font awesome processing, inline
		// download, minify, cache
		$tkey = 'css-'.hash('adler32', $href).'.css';
		$json = WP_Optimize_Minify_Cache_Functions::get_transient($tkey);
		if (false === $json) {
			$json = WP_Optimize_Minify_Functions::download_and_minify($href, null, $wpo_minify_options['enable_css_minification'], 'css', $handle);
			if ($wpo_minify_options['debug']) {
				echo "<!-- wpo_min DEBUG: Uncached file processing now for " . esc_html($href) . " -->" . "\n";
			}
			WP_Optimize_Minify_Cache_Functions::set_transient($tkey, $json);
		}
	
		// decode
		$res = json_decode($json, true);
		
		// add font-display
		// https://developers.google.com/web/updates/2016/02/font-display
		$res['code'] = str_ireplace('font-style:normal;', 'font-display:block;font-style:normal;', $res['code']);
		
		// inline css or fail
		if (false != $res['status']) {
			echo '<style type="text/css" media="all">' . "\n";
			echo $res['code'] . "\n"; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- This is already escaped
			echo '</style>' . "\n";
			return true;
		} else {
			return false;
		}
	}

	/**
	 * Print a normal style tag pointing the href
	 *
	 * @param string $href
	 * @return void
	 */
	public static function style($href) {
		echo '<link rel="stylesheet" href="'.esc_url($href).'" media="all">' . "\n"; // phpcs:ignore WordPress.WP.EnqueuedResources.NonEnqueuedStylesheet -- Not applicable here
	}

	/**
	 * Write header
	 *
	 * @param string $file
	 * @param string $headers
	 * @return void
	 */
	public static function write_header($file, $headers) {
		file_put_contents($file, $headers);
		WP_Optimize_Minify_Cache_Functions::fix_permission_bits($file);
	}

	/**
	 * Write CSS
	 *
	 * @param string $file
	 * @param string $code
	 * @param string $log
	 * @return void
	 */
	public static function write_combined_asset($file, $code, $log) {
		file_put_contents($file.'.json', wp_json_encode($log));
		file_put_contents($file, $code);
		// permissions
		WP_Optimize_Minify_Cache_Functions::fix_permission_bits($file.'.json');
		WP_Optimize_Minify_Cache_Functions::fix_permission_bits($file);

		if (function_exists('gzencode')) {
			file_put_contents($file.'.gz', gzencode(file_get_contents($file), 9));
			WP_Optimize_Minify_Cache_Functions::fix_permission_bits($file.'.gz');
		}
		
		// brotli static support
		if (function_exists('brotli_compress')) {
			file_put_contents($file.'.br', brotli_compress(file_get_contents($file), 11));
			WP_Optimize_Minify_Cache_Functions::fix_permission_bits($file.'.br');
		}
	}
	/**
	 * Load async scripts with callback
	 *
	 * @return void
	 */
	public static function add_load_async() {
		$min_or_not_internal = WP_Optimize()->get_min_or_not_internal_string();
		$contents = file_get_contents(trailingslashit(WPO_PLUGIN_MAIN_PATH) . "js/loadAsync$min_or_not_internal.js");
		echo "<script>$contents</script>\n"; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- Output is already escaped
	}

	/**
	 * Defer CSS globally from the header (order matters)
	 * Dev: https://www.filamentgroup.com/lab/async-css.html
	 *
	 * @return void
	 */
	public static function add_load_css() {
		$min_or_not_internal = WP_Optimize()->get_min_or_not_internal_string();
		$contents = file_get_contents(trailingslashit(WPO_PLUGIN_MAIN_PATH) . "js/loadCSS$min_or_not_internal.js");
		echo "<script>$contents</script>" . "\n"; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- Output is already escaped
	}
}
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if (!defined('ABSPATH')) die('Access denied.');

if (!class_exists('Updraft_Task_1_2')) require_once(WPO_PLUGIN_MAIN_PATH . 'vendor/team-updraft/common-libs/src/updraft-tasks/class-updraft-task.php');

class WP_Optimize_Minify_Load_Url_Task extends Updraft_Task_1_2 {

	/**
	 * Default options.
	 */
	public function get_default_options() {
		return array();
	}

	/**
	 * Run preload http requests with different user-agent values to cache pages for different devices.
	 *
	 * @return bool
	 */
	public function run() {
		$url = $this->get_option('url');

		if (empty($url)) return;

		$minify_preloader = WP_Optimize_Minify_Preloader::instance();

		// load pages with different user-agents values.

		$minify_preloader->preload_desktop($url);
		$minify_preloader->preload_amp($url);

		if (defined('WP_CLI') && WP_CLI) {
			WP_CLI::log($url);
		}

		/**
		 * Action triggered after preloading a single url
		 *
		 * @param string $url             The url to preload
		 * @param object $minify_preloader Minify preloader instance
		 */
		do_action('wpoptimize_after_minify_preload_url', $url, $minify_preloader);

		/**
		 * Allows to change the delay between each URL preload, to reduce server load.
		 *
		 * @param integer $preload_delay The delay between each request in microseconds (1000000 = 1 second).
		 */
		usleep(apply_filters('wpoptimize_minify_preload_delay', 500000));

		return true;
	}
}
���������������������������������������������������������������������������������������������������������������������������class-wp-optimize-minify-config.php�����������������������������������������������������������������0000644�����������������00000012753�15162435533�0013417 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������<?php

if (!defined('ABSPATH')) die('No direct access allowed');

/**
 * Handles cache configuration and related I/O
 */

if (!class_exists('WP_Optimize_Minify_Config')) :

class WP_Optimize_Minify_Config {

	static protected $_instance = null;

	private $_options = array();

	/**
	 * Construct
	 *
	 * @return void
	 */
	private function __construct() {
	}

	/**
	 * Getter to see if Minify is enabled
	 *
	 * @return bool
	 */
	public function is_enabled() {
		return $this->get('enabled');
	}

	/**
	 * Removes all Minify settings from the Database if 'preserve_settings_on_uninstall' is false
	 *
	 * @return void
	 */
	public function purge() {
		if (!$this->get('preserve_settings_on_uninstall')) {
			if (is_multisite()) {
				delete_site_option('wpo_minify_config');
			} else {
				delete_option('wpo_minify_config');
			}
		}
	}

	/**
	 * Get config from file or cache
	 *
	 * @param string $option  - An option name
	 * @param mixed  $default - A default for the option
	 * @return array|string
	 */
	public function get($option = null, $default = false) {
		if (empty($this->_options)) {
			if (is_multisite()) {
				$config = get_site_option('wpo_minify_config', array());
			} else {
				$config = get_option('wpo_minify_config', array());
			}
			$this->_options = wp_parse_args($config, $this->get_defaults());
		}
		
		if ($option && isset($this->_options[$option])) {
			return $this->_options[$option];
		} elseif ($option) {
			return $default;
		}
		return $this->_options;
	}

	/**
	 * Update the config
	 *
	 * @param array $config - The new configuration array
	 * @return boolean
	 */
	public function update($config) {
		$prev_settings = $this->get();
		$prev_settings = wp_parse_args($prev_settings, $this->get_defaults());
		$new_settings = wp_parse_args($config, $prev_settings);
		$this->_options = $new_settings;

		if (is_multisite()) {
			update_site_option('wpo_minify_config', $new_settings);
		} else {
			update_option('wpo_minify_config', $new_settings);
		}

		return true;
	}

	/**
	 * Return defaults
	 *
	 * @return array
	 */
	public function get_defaults() {
		$defaults = array(
			// dev tab checkboxes
			'debug' => false,
			'enabled_css_preload' => false,
			'enabled_js_preload' => false,
			'hpreconnect' => '',
			'hpreload' => '',
			'loadcss' => false,
			'remove_css' => false,
			'critical_path_css' => '',
			'critical_path_css_is_front_page' => '',
			// settings tab checkboxes
			'preserve_settings_on_uninstall' => true,
			'disable_when_logged_in' => false,
			'default_protocol' => 'dynamic', // dynamic, http, https
			'html_minification' => true,
			'clean_header_one' => false,
			'emoji_removal' => true,
			'merge_google_fonts' => true,
			'enable_display_swap' => true,
			'remove_googlefonts' => false,
			'disable_google_fonts_processing' => false,
			'gfonts_method' => 'inherit', // inline, async, exclude
			'fawesome_method' => 'inherit', // inline, async, exclude
			'enable_css' => true,
			'enable_css_minification' => true,
			'enable_merging_of_css' => true,
			'remove_print_mediatypes' => false,
			'inline_css' => false,
			'enable_js' => true,
			'enable_js_minification' => true,
			'enable_merging_of_js' => true,
			'enable_defer_js' => 'individual',
			'defer_js_type' => 'defer',
			'defer_jquery' => true,
			'enable_js_trycatch' => false,
			'exclude_defer_login' => true,
			'cdn_url' => '',
			'cdn_force' => false,

			'enable_delay_js' => false,
			'enable_preload_js' => false,
			'exclude_delay_js' => '',

			'async_css' => '',
			'async_js' => '',
			'disable_css_inline_merge' => true,
			/**
			 * UA list compiled from these resources:
			 * https://explore.whatismybrowser.com/useragents/explore/software_name/gtmetrix-analyser/
			 * https://explore.whatismybrowser.com/useragents/explore/software_name/pingdom-bot/
			 * https://explore.whatismybrowser.com/useragents/explore/software_name/google-lighthouse/
			 * https://explore.whatismybrowser.com/useragents/explore/software_name/googlebot/
			 * https://explore.whatismybrowser.com/useragents/explore/software_name/headless-chrome/
			 */
			'ualist' => array('Googlebot', 'Chrome-Lighthouse', 'GTmetrix', 'HeadlessChrome', 'Pingdom'),
			'exclude_js_from_page_speed_tools' => false,
			'exclude_css_from_page_speed_tools' => false,
			'blacklist' => array(),
			'ignore_list' => array(),
			'exclude_js' => '',
			'exclude_css' => '',
			'edit_default_exclutions' => false,
			
			'merge_allowed_urls' => '',
			
			// internal
			'enabled' => false,
			'last-cache-update' => 0,
			'plugin_version' => '0.0.0',
			'cache_lifespan' => 30,
			'merge_inline_extra_css_js' => true,
			
			'enable_analytics' => false,
			'analytics_method' => 'gtagv4',
			'tracking_id' => '',
		);
		return apply_filters('wpo_minify_defaults', $defaults);
	}

	/**
	 * Check whether everything should be purged instead of just incremented
	 *
	 * @return boolean
	 */
	public function always_purge_everything() {
		/**
		 * Filters the result of always_purge_everything
		 *
		 * @return boolean
		 */
		return apply_filters('wpo_minify_always_purge_everything', 0 === intval($this->get('cache_lifespan')) || (defined('WPO_ADVANCED_CACHE') && defined('WP_CACHE') && WP_CACHE));
	}

	/**
	 * Get the instance
	 *
	 * @return WP_Optimize_Minify_Config
	 */
	public static function get_instance() {
		if (!self::$_instance) {
			self::$_instance = new self();
		}
		return self::$_instance;
	}
}

/**
 * Get WPO Minify instance
 *
 * @return WP_Optimize_Minify_Config
 */
function wp_optimize_minify_config() {
	return WP_Optimize_Minify_Config::get_instance();
}
endif;
���������������������class-wp-optimize-detect-minify-plugins.php���������������������������������������������������������0000644�����������������00000003432�15162435534�0015074 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������<?php

if (!defined('ABSPATH')) die('No direct access allowed');

class WP_Optimize_Detect_Minify_Plugins {

	/**
	 * Detect list of active most popular WordPress minify plugins.
	 *
	 * @return array
	 */
	public function get_active_minify_plugins() {

		$active_minify_plugins = array();

		foreach ($this->get_plugins() as $plugin_slug => $plugin_title) {
			if ($this->is_plugin_active($plugin_slug) && $this->is_minify_active($plugin_slug)) {
				$active_minify_plugins[$plugin_slug] = $plugin_title;
			}
		}

		return $active_minify_plugins;
	}

	/**
	 * Get the plugins list
	 *
	 * @return array
	 */
	protected function get_plugins() {
		return array(
			'w3-total-cache' => 'W3 Total Cache',
			'autoptimize' => 'Autoptimize',
			'fast-velocity-minify' => 'Fast Velocity Minify',
		);
	}

	/**
	 * Check if $plugin is active.
	 *
	 * @param string $plugin - plugin slug
	 *
	 * @return bool
	 */
	private function is_plugin_active($plugin) {
		$status = WP_Optimize()->get_db_info()->get_plugin_status($plugin);

		return $status['active'];
	}

	/**
	 * Check if minify feature is active
	 *
	 * @return bool
	 */
	public function is_minify_active($plugin_slug) {
		switch ($plugin_slug) {
			case 'w3-total-cache':
				return (function_exists('w3tc_config') && w3tc_config()->get_boolean('minify.enabled'));
			case 'autoptimize':
				return ('on' == get_option('autoptimize_js', false) || 'on' == get_option('autoptimize_css', false) || 'on' == get_option('autoptimize_html', false));
			case 'fast-velocity-minify':
				return true;
		}
	}

	/**
	 * Instance of WP_Optimize_Detect_Minify_Plugins.
	 *
	 * @return WP_Optimize_Detect_Minify_Plugins
	 */
	public static function get_instance() {
		static $instance = null;
		if (null === $instance) {
			$instance = new self();
		}
		return $instance;
	}
}
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if (!defined('ABSPATH')) die('No direct access allowed');

if (!class_exists('WP_Optimize_Minify_Load_Url_Task')) {
	require_once(WPO_PLUGIN_MAIN_PATH . 'minify/class-wp-optimize-minify-load-url-task.php');
}

class WP_Optimize_Minify_Preloader extends WP_Optimize_Preloader {

	protected $preload_type = 'minify';
	
	protected $task_type = 'minify-load-url-task';

	static protected $_instance = null;

	/**
	 * WP_Optimize_Page_Cache_Preloader constructor.
	 */
	public function __construct() {
		parent::__construct();

		add_filter('cron_schedules', array($this, 'cron_add_intervals'));
	}

	/**
	 * Check if minify is active.
	 *
	 * @return bool
	 */
	public function is_option_active() {
		if (!function_exists('wp_optimize_minify_config')) {
			include_once WPO_PLUGIN_MAIN_PATH . 'minify/class-wp-optimize-minify-config.php';
		}
		return wp_optimize_minify_config()->get('enabled');
	}

	/**
	 * Add intervals to cron schedules.
	 *
	 * @param array $schedules
	 *
	 * @return array
	 */
	public function cron_add_intervals($schedules) {
		$interval = $this->get_continue_preload_cron_interval();
		$schedules['wpo_minify_preload_continue_interval'] = array(
			'interval' => $interval,
			'display' => round($interval / 60, 1).' minutes'
		);

		return $schedules;
	}

	/**
	 * Create tasks (WP_Optimize_Load_Url_Task) for preload all urls from site.
	 *
	 * @param string $type The preload type (currently: scheduled, manual)
	 * @return void
	 */
	public function create_tasks_for_preload_site_urls($type = 'manual') {
		$urls = $this->get_site_urls();

		if (!empty($urls)) {

			$this->log(__('Minify: Creating tasks for preload site urls.', 'wp-optimize'));

			foreach ($urls as $url) {
				if (wpo_url_in_exceptions($url)) continue;

				// this description is being used for internal purposes.
				$description = 'Preload - '.$url;
				$options = array('url' => $url, 'preload_type' => $type, 'anonymous_user_allowed' => (defined('DOING_CRON') && DOING_CRON) || (defined('WP_CLI') && WP_CLI));

				WP_Optimize_Minify_Load_Url_Task::create_task($this->task_type, $description, $options, 'WP_Optimize_Minify_Load_Url_Task');
			}

			$this->log(__('Minify: Tasks for preload site urls created.', 'wp-optimize'));
		}
	}

	/**
	 * Instance of WP_Optimize_Minify_Preloader.
	 *
	 * @return WP_Optimize_Minify_Preloader
	 */
	public static function instance() {
		if (empty(self::$_instance)) {
			self::$_instance = new WP_Optimize_Minify_Preloader();
		}

		return self::$_instance;
	}

	/**
	 * Option disabled error message
	 *
	 * @return array
	 */
	protected function get_option_disabled_error() {
		return array(
			'success' => false,
			'error' => __('Minify is disabled.', 'wp-optimize')
		);
	}

	/**
	 * Get preload already running error message
	 *
	 * @return array
	 */
	protected function get_preload_already_running_error() {
		return array(
			'success' => false,
			'error' => __('Probably minify preload is running already.', 'wp-optimize')
		);
	}

	protected function get_preload_data() {
		$cache_path = WP_Optimize_Minify_Cache_Functions::cache_path();
		$cache_dir = $cache_path['cachedir'];
		$minify_cache_data = array();
		$minify_cache_data['size'] = esc_html(WP_Optimize_Minify_Cache_Functions::get_cachestats($cache_dir));
		$minify_cache_data['total_size'] = esc_html(WP_Optimize_Minify_Cache_Functions::get_cachestats(WPO_CACHE_MIN_FILES_DIR));
		return $minify_cache_data;
	}

	protected function get_preloading_message($minify_cache_data) {
		return array(
			'done' => false,
			'message' => __('Loading URLs...', 'wp-optimize'),
			'size' => WP_Optimize()->format_size($minify_cache_data['size']),
			'total_size' => $minify_cache_data['total_size']
		);
	}

	protected function get_last_preload_message($minify_cache_data, $last_preload_time_str) {
		return array(
			'done' => true,
			// translators: %s: last preload time
			'message' => sprintf(__('Last preload finished at %s', 'wp-optimize'), $last_preload_time_str),
			'size' => WP_Optimize()->format_size($minify_cache_data['size']),
			'total_size' => $minify_cache_data['total_size']
		);
	}

	protected function get_preload_success_message($minify_cache_data) {
		return array(
			'done' => true,
			'size' => WP_Optimize()->format_size($minify_cache_data['size']),
			'total_size' => $minify_cache_data['total_size']
		);
	}

	protected function get_preload_progress_message($minify_cache_data, $preloaded_message, $preload_resuming_in) {
		return array(
			'done' => false,
			'message' => $preloaded_message,
			'size' => WP_Optimize()->format_size($minify_cache_data['size']),
			'total_size' => $minify_cache_data['total_size'],
			'resume_in' => $preload_resuming_in
		);
	}
}

WP_Optimize_Minify_Preloader::instance();
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if (!defined('ABSPATH')) die('No direct access allowed');

class WP_Optimize_Minify_Fonts {

	private static $fonts = array();

	private static $subsets = array();

	/**
	 * Get a list of Google fonts
	 *
	 * @return Array
	 */
	public static function get_google_fonts() {
		// https://www.googleapis.com/webfonts/v1/webfonts?sort=alpha
		$google_fonts_file = WPO_PLUGIN_MAIN_PATH.'google-fonts.json';
		if (is_file($google_fonts_file) && is_readable($google_fonts_file)) {
			return json_decode(file_get_contents($google_fonts_file), true);
		}
		return array();
	}

	/**
	 * Check if the google font exist or not
	 *
	 * @param string $font
	 * @return boolean
	 */
	public static function concatenate_google_fonts_allowed($font) {
		$gfonts_whitelist = self::get_google_fonts();

		// normalize
		$font = str_ireplace('+', ' ', strtolower($font));
		
		return in_array($font, $gfonts_whitelist);
	}

	/**
	 * Concatenates Google Fonts tags (http://fonts.googleapis.com/css?...)
	 *
	 * @param array $gfonts_array
	 * @return string|boolean
	 */
	public static function concatenate_google_fonts($gfonts_array) {
		// Loop through fonts array
		foreach ($gfonts_array as $font) {
			self::parse_font_url($font);
		}
		self::convert_v1_font_specs_to_v2();
		$merge = self::build();
		$config = wp_optimize_minify_config();
		/**
		 * Filters whether to add display=swap to Google fonts urls
		 *
		 * @param boolean $display - Default to true
		 */
		if (apply_filters('wpo_minify_gfont_display_swap', $config->get('enable_display_swap'))) {
			/**
			 * Filters the value of the display parameter.
			 *
			 * @param string $display_value - Default to 'swap'. https://developer.mozilla.org/en-US/docs/Web/CSS/@font-face/font-display
			 */
			$merge.= '&display='.apply_filters('wpo_minify_gfont_display_type', 'swap');
		}

		if (!empty($merge)) return 'https://fonts.googleapis.com/css2?' . $merge;

		return false;
	}

	/**
	 * Parses font url based on whether it is API version 1 or 2
	 */
	private static function parse_font_url($font) {
		if (false !== strpos($font, 'css?')) {
			self::parse_font_api1_url($font);
		} else {
			self::parse_font_api2_url($font);
		}
	}

	/**
	 * Parses google font api version 1 url
	 */
	private static function parse_font_api1_url($font) {
		parse_str(wp_parse_url(rtrim($font, '|'), PHP_URL_QUERY), $font_elements);
		// Process each font family
		foreach (explode('|', $font_elements['family']) as $font_family) {
			// Separate font and sizes
			$font_family = explode(':', $font_family);
			// if the family wasn't added yet
			if (!in_array($font_family[0], array_keys(self::$fonts))) {
				self::$fonts[$font_family[0]]['specs'] = isset($font_family[1]) ? explode(',', rtrim($font_family[1], ',')) : array();
			} else {
				// if the family was already added, and this new one has weights, merge with previous
				if (isset($font_family[1])) {
					if (isset(self::$fonts[$font_family[0]]['version']) && 'V2' == self::$fonts[$font_family[0]]['version']) {
						self::$fonts[$font_family[0]]['specs'] = explode(',', rtrim($font_family[1], ','));
					} else {
						self::$fonts[$font_family[0]]['specs'] = array_merge(self::$fonts[$font_family[0]]['specs'], explode(',', rtrim($font_family[1], ',')));
					}
				}
			}
			self::$fonts[$font_family[0]]['version'] = 'V1';
		}

		// Add subsets
		if (isset($font_elements['subset'])) {
			self::$subsets = array_merge(self::$subsets, explode(',', $font_elements['subset']));
		}
	}

	/**
	 * Parses google font api version 2 url
	 */
	private static function parse_font_api2_url($font) {
		$parsed_url = wp_parse_url($font, PHP_URL_QUERY);
		$query_elements = explode('&', $parsed_url);
		foreach ($query_elements as $element) {
			$family_str = str_replace('family=', '', $element);
			$family = explode(':', $family_str);
			if (!empty($family)) {
				$font_name = $family[0];
				$font_elements = isset($family[1]) ? explode('@', $family[1]) : '';
				if (!empty($font_elements) && !empty($font_elements[0]) && !empty($font_elements[1])) {
					$font_styles = $font_elements[0];
					$font_units = explode(',', $font_elements[1]);
				}
			} else {
				$font_name = $family_str;
				continue;
			}
	
			if (!isset(self::$fonts[$font_name])) {
				self::$fonts[$font_name]['specs'] = array(
					'wght' => array(),
					'ital' => array(),
					'ital,wght' => array(),
				);
			}

			if (!isset(self::$fonts[$font_name]['version'])) {
				self::$fonts[$font_name]['version'] = 'V2';
			}
			if (isset($font_styles) && isset($font_units) && isset($font_elements[1])) {
				$font_units = explode(';', $font_elements[1]);
				switch ($font_styles) {
					case 'wght':
						foreach ($font_units as $font_unit) {
							if (!in_array($font_unit, self::$fonts[$font_name]['specs']['wght'])) {
								array_push(self::$fonts[$font_name]['specs']['wght'], $font_unit);
							}
						}
						break;
					case 'ital':
						foreach ($font_units as $font_unit) {
							if (!in_array($font_unit, self::$fonts[$font_name]['specs']['ital'])) {
								array_push(self::$fonts[$font_name]['specs']['ital'], $font_unit);
							}
						}
						break;
					case 'ital,wght':
						foreach ($font_units as $font_unit) {
							if (!in_array($font_unit, self::$fonts[$font_name]['specs']['ital,wght'])) {
								array_push(self::$fonts[$font_name]['specs']['ital,wght'], $font_unit);
							}
						}
						break;
				}
			}
		}
	}

	/**
	 * Converts google font api version 1 font specification into API V2
	 */
	private static function convert_v1_font_specs_to_v2() {
		foreach (self::$fonts as $font_name => $font_details) {
			if ('V2' == $font_details['version']) continue;
			if (0 == count($font_details['specs'])) {
				self::$fonts[$font_name]['specs'] = array(
					'wght' => array(),
					'ital' => array(),
					'ital,wght' => array(),
				);
			} else {
				foreach ($font_details['specs'] as $key => $detail) {
					if (is_array($detail)) $detail = implode('', $detail);
					switch ($detail) {
						case 'i':
							unset(self::$fonts[$font_name]['specs'][$key]);
							self::$fonts[$font_name]['specs']['ital'] = array(1);
							break;
						case 'b':
							unset(self::$fonts[$font_name]['specs'][$key]);
							self::$fonts[$font_name]['specs']['wght'] = array();
							break;
						case 'bi':
							unset(self::$fonts[$font_name]['specs'][$key]);
							self::$fonts[$font_name]['specs']['ital'] = array('0;1');
							break;
						default:
							unset(self::$fonts[$font_name]['specs'][$key]);
							if (!isset(self::$fonts[$font_name]['specs']['ital,wght'])) {
								self::$fonts[$font_name]['specs']['ital,wght'] = array();
							}
							if ('inherit' === $detail) {
								array_push(self::$fonts[$font_name]['specs']['ital,wght'], '0,400');
								array_push(self::$fonts[$font_name]['specs']['ital,wght'], '1,400');
							} elseif ('regular' === $detail) {
								$detail = 'regular' === $detail ? 400 : $detail;
								array_push(self::$fonts[$font_name]['specs']['ital,wght'], '0,' . $detail);
							} elseif (false !== strpos($detail, 'i')) {
								$detail = str_replace(array('italic', 'i'), '', $detail);
								$detail = '' === $detail ? 400 : $detail;
								array_push(self::$fonts[$font_name]['specs']['ital,wght'], '1,' . $detail);
							} else {
								$detail = str_replace(array('normal'), '', $detail);
								$detail = '' === $detail ? 400 : $detail;
								array_push(self::$fonts[$font_name]['specs']['ital,wght'], '0,' . $detail);
							}
							break;
					}
				}
			}
		}
	}

	/**
	 * Build valid Google font api 2 url string
	 *
	 * @return string $result Url string
	 */
	private static function build() {
		$result = '';
		foreach (self::$fonts as $font_name => $font_details) {
			if ('display=swap' == $font_name) continue;
			if ('' != $result) {
				$result .= '&';
			}
			$result .= 'family=' . str_replace(' ', '+', $font_name);
			$result .= self::specs_to_string($font_details['specs']);
		}
		return $result;
	}

	/**
	 * Converts font specifications into a valid google font api2 url string
	 *
	 * @param array $font_specs Font style and weight specifications
	 *
	 * @return string
	 */
	private static function specs_to_string($font_specs) {
		$result = array();
		$weights = isset($font_specs['wght']) && count($font_specs['wght']);
		$italic_weights = isset($font_specs['ital']) && count($font_specs['ital']);
		$all_weights = isset($font_specs['ital,wght']) && count($font_specs['ital,wght']);

		// Nothing is set, return
		if (!$weights && !$italic_weights && !$all_weights) {
			return '';
		}

		// Italic only
		if ($italic_weights && !$weights && !$all_weights) {
			if ('1' == $font_specs['ital'][0]) {
				return ':ital@1';
			} elseif ('0;1' == $font_specs['ital'][0]) {
				return ':ital@0;1';
			}
		}

		foreach ($font_specs as $style => $units) {
			switch ($style) {
				case 'wght':
					foreach ($units as $unit) {
						$multiple_units = explode(',', $unit);
						if (count($multiple_units) > 0) {
							foreach ($multiple_units as $single_unit) {
								array_push($result, '0,' . $single_unit);
							}
						} else {
							array_push($result, '0,' . $unit);
						}
					}
					break;
				case 'ital':
					foreach ($units as $unit) {
						array_push($result, 1 == $unit ? '1,400' : $unit);
					}
					break;
				case 'ital,wght':
					foreach ($units as $unit) {
						array_push($result, $unit);
					}
					break;
			}
		}

		sort($result);
		return ':ital,wght@' . implode(';', array_unique($result));
	}
}
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if (!defined('ABSPATH')) die('No direct access allowed');

if (!class_exists('WP_Optimize_Minify_Config')) require_once(dirname(__FILE__) . '/class-wp-optimize-minify-config.php');
if (!class_exists('WP_Optimize_Minify_Preloader')) require_once(dirname(__FILE__) . '/class-wpo-minify-preloader.php');

/**
 * All cache commands that are intended to be available for calling from any sort of control interface (e.g. wp-admin, UpdraftCentral) go in here. All public methods should either return the data to be returned, or a WP_Error with associated error code, message and error data.
 */
class WP_Optimize_Minify_Commands {

	/**
	 * List all cache files
	 *
	 * @param array $data - The $_POST data
	 * @return array
	 */
	public function get_minify_cached_files($data = array()) {
		$stamp = isset($data['stamp']) ? $data['stamp'] : 0;
		$files = WP_Optimize_Minify_Cache_Functions::get_cached_files($stamp, false);
		$files['js'] = array_map(array('WP_Optimize_Minify_Cache_Functions', 'format_file_logs'), $files['js']);
		$files['css'] = array_map(array('WP_Optimize_Minify_Cache_Functions', 'format_file_logs'), $files['css']);
		return $files;
	}

	/**
	 * Removes the entire cache dir.
	 * Use with caution, as cached html may still reference those files.
	 *
	 * @return array
	 */
	public function purge_all_minify_cache() {
		WP_Optimize_Minify_Cache_Functions::purge();
		WP_Optimize_Minify_Cache_Functions::cache_increment();
		$others = WP_Optimize_Minify_Cache_Functions::purge_others();
		$files = $this->get_minify_cached_files();

		$message = array_merge(array(esc_html__('The minification cache was deleted.', 'wp-optimize')), $others);
		$message = WP_Optimize_Minify_Functions::apply_strip_tags_for_messages_array($message, '');
		
		return array(
			'success' => true,
			'message' => implode("\n", $message),
			'files' => $files
		);
	}

	/**
	 * Forces a new Cache to be built
	 *
	 * @return array
	 */
	public function minify_increment_cache() {
		WP_Optimize_Minify_Cache_Functions::cache_increment();
		$files = $this->get_minify_cached_files();
		return array(
			'success' => true,
			'files' => $files
		);
	}

	/**
	 * Purge the cache
	 *
	 * @return array
	 */
	public function purge_minify_cache() {
		if (!WP_Optimize()->get_minify()->can_purge_cache() && !(defined('WP_CLI') && WP_CLI)) {
			return array(
				'error' => __('You do not have permission to purge the cache', 'wp-optimize')
			);
		}

		// deletes temp files and old caches incase CRON isn't working
		WP_Optimize_Minify_Cache_Functions::cache_increment();
		if (wp_optimize_minify_config()->always_purge_everything()) {
			WP_Optimize_Minify_Cache_Functions::purge();
			$state = array();
			$old = array();
		} else {
			$state = WP_Optimize_Minify_Cache_Functions::purge_temp_files();
			$old = WP_Optimize_Minify_Cache_Functions::purge_old();
		}
		$others = WP_Optimize_Minify_Cache_Functions::purge_others();
		$files = $this->get_minify_cached_files();

		$notice = array_merge(array(esc_html__('All caches from WP-Optimize Minify have been purged.', 'wp-optimize')), $others);
		
		$notice = WP_Optimize_Minify_Functions::apply_strip_tags_for_messages_array($notice, '');

		$notice = wp_json_encode($notice); // encode

		return array(
			'result' => 'caches cleared',
			'others' => implode("\n", $others),
			'state' => $state,
			'message' => $notice,
			'old' => $old,
			'files' => $files
		);
	}

	/**
	 * Delete minify cache file
	 *
	 * @param string $filename
	 * @return array
	 */
	public function delete_minify_cache_file($filename) {
		if (!WP_Optimize()->get_minify()->can_purge_cache()) return array('error' => __('You do not have permission to purge the cache', 'wp-optimize'), 'result' => '', 'files' => '');
		
		$response = array(
			'result' => __('Cache file was not found.', 'wp-optimize'),
			'files' => '',
			'error' => '',
		);

		if (empty($filename)) return $response;

		$is_valid_filename = $this->is_valid_filename($filename);

		if (!$is_valid_filename) {
			return $response;
		} else {
			$filename = pathinfo($filename, PATHINFO_BASENAME);
			
			$data = $this->get_file_data($filename);

			if (empty($data)) return $response;
			$this->fetch_and_remove_temp_minify_cache_files($data);

			$files = $this->get_minify_cached_files();
			return array(
				'result' => __('Cache deleted.', 'wp-optimize'),
				'files' => $files,
				'error' => '',
			);
		}
	}

	/**
	 * Fetch and remove the temp and minify js/css cache files.
	 *
	 * @param Array $data file data
	 */
	public function fetch_and_remove_temp_minify_cache_files($data) {
		$filename = $data['filename'];
		$log = $data['log'];
		
		// get cache directories and urls
		$cache_path = WP_Optimize_Minify_Cache_Functions::cache_path();
		$tmp_dir = $cache_path['tmpdir'];
		$cache_dir = $cache_path['cachedir'];

		$ext_to_delete = array('', '.json', '.gz');
		foreach ($ext_to_delete as $ext) {
			$this->check_and_delete($cache_dir . '/' . $filename . $ext);
		}

		if (empty($log->files)) return;
		foreach ($log->files as $key => $value) {
			$transient_file = $this->get_transient_file($key, $value, $filename);
			$this->check_and_delete($tmp_dir.'/'.$transient_file);
		}
	}

	/**
	 * Save options to the config
	 *
	 * @param array $data
	 * @return array
	 */
	public function save_minify_settings($data) {
		$new_data = array();
		foreach ($data as $key => $value) {
			if ('true' === $value) {
				$new_data[$key] = true;
			} elseif ('false' === $value) {
				$new_data[$key] = false;
			} else {
				$new_data[$key] = trim($value);
			}
		}

		if (isset($data['minify_advanced_tab'])) {
			// Make sure that empty settings are still saved
			if (!isset($new_data['ignore_list'])) $new_data['ignore_list'] = array();
			if (!isset($new_data['blacklist'])) $new_data['blacklist'] = array();
		}

		/**
		 * Filters the data before saving it
		 *
		 * @param array $new_data - The original data
		 * @return array The data, altered or not
		 */
		$new_data = apply_filters('wpo_save_minify_settings', $new_data);

		if (!class_exists('WP_Optimize_Minify_Config')) return array(
			'success' => false,
			'message' => "WP_Optimize_Minify_Config class doesn't exist",
		);
		$working = wp_optimize_minify_config()->update($new_data);
		if (!$working) {
			return array(
				'success' => false,
				'error' => 'failed to save minify settings'
			);
		}
		$purged = $this->purge_minify_cache();
		return array(
			'success' => true,
			'files' => isset($purged['files']) ? $purged['files'] : array(),
		);
	}

	/**
	 * Hide the information notice for the current user
	 *
	 * @return array
	 */
	public function hide_minify_notice() {
		return array(
			'success' => update_user_meta(get_current_user_id(), 'wpo-hide-minify-information-notice', true)
		);
	}

	/**
	 * Get the current status
	 *
	 * @return array
	 */
	public function get_status() {
		$config = wp_optimize_minify_config()->get();
		return array(
			'enabled' => $config['enabled'],
			'js' => $config['enable_js'],
			'css' => $config['enable_css'],
			'html' => $config['html_minification'],
			'stats' => $this->get_minify_cached_files()
		);
	}

	/**
	 * Run minify preload action.
	 *
	 * @return void|array - Doesn't return anything if run() is successful (Run() prints a JSON object and closed browser connection) or an array if failed.
	 */
	public function run_minify_preload() {
		return WP_Optimize_Minify_Preloader::instance()->run('manual');
	}
	
	/**
	 * Cancel minify preload action.
	 *
	 * @return array
	 */
	public function cancel_minify_preload() {
		WP_Optimize_Minify_Preloader::instance()->cancel_preload();
		return WP_Optimize_Minify_Preloader::instance()->get_status_info();
	}

	/**
	 * Get status of minify preload.
	 *
	 * @return array
	 */
	public function get_minify_preload_status() {
		return WP_Optimize_Minify_Preloader::instance()->get_status_info();
	}

	/**
	 * Returns the combined json of all available meta.json files
	 *
	 * @return array
	 */
	public function get_minify_meta_files() {
		$enabled = wp_optimize_minify_config()->get('enabled');
		if (!$enabled) return array(
			'success' => false,
			'error' => __('Minify not enabled', 'wp-optimize'),
		);
		$combined_metas = array(
			'meta_logs' => array()
		);

		// loop through wpo-minify cache directory and get the meta.json files, combine into a single json file
		if (is_dir(WPO_CACHE_MIN_FILES_DIR) && wp_is_writable(dirname(WPO_CACHE_MIN_FILES_DIR))) {
			if ($handle = opendir(WPO_CACHE_MIN_FILES_DIR)) {
				while (false !== ($d = readdir($handle))) {
					if (0 === strcmp($d, '.') || 0 === strcmp($d, '..') || !is_numeric($d)) {
						continue;
					}
					$cache_min_folder = WPO_CACHE_MIN_FILES_DIR.'/'.$d;
					if ($cache_min_folder_handle = opendir($cache_min_folder)) {
						while (false !== ($maybe_file = readdir($cache_min_folder_handle))) {
							if (0 === strcmp($maybe_file, '.') || 0 === strcmp($maybe_file, '..')) {
								continue;
							}
							$maybe_file_path = $cache_min_folder . '/' . $maybe_file;
							if (is_file($maybe_file_path) && 'meta.json' === basename($maybe_file_path)) {
								$combined_metas['meta_logs'][$d] = json_decode(file_get_contents($maybe_file_path));
							}
						}
						closedir($cache_min_folder_handle);
					}
				}
				closedir($handle);
			}
		}

		if (0 === count($combined_metas['meta_logs'])) {
			return array(
				'success' => false,
				'error' => __('No file was found', 'wp-optimize'),
			);
		} else {
			return array(
				'success' => true,
				'combined_metas' => $combined_metas
			);
		}
	}

	/**
	 * Get minify file data.
	 *
	 * @param string $filename
	 * @return array
	 */
	private function get_file_data($filename) {
		$log = false;
		$data = array();
		$cache_path = WP_Optimize_Minify_Cache_Functions::cache_path();
		$cache_dir = $cache_path['cachedir'];
		$file = $cache_dir.'/'.$filename;

		if (file_exists($file.'.json')) {
			$log = json_decode(file_get_contents($file.'.json'));
			$data['filename'] = $filename;
			$data['log'] = $log;
		}

		return $data;
	}

	/**
	 * Check minify file exists and delete it.
	 *
	 * @param string $file
	 */
	private function check_and_delete($file) {
		if (file_exists($file)) {
			wp_delete_file($file);
		}
	}

	/**
	 * Get transient file.
	 *
	 * @param string $key
	 * @param string $value
	 * @param string $filename
	 * @return string
	 */
	private function get_transient_file($key, $value, $filename) {
		$url = $value->url;
		$file_url = site_url().$url;
		$file_ext = $this->get_file_extension($filename);

		$href = WP_Optimize_Minify_Functions::get_hurl($file_url);
		$transient_key = $file_ext.'-'.hash('adler32', $key.$href).'.'.$file_ext;
		return $transient_key.'.transient';
	}

	/**
	 * Get file extension.
	 *
	 * @param string $filename
	 * @return string
	 */
	private function get_file_extension($filename) {
		$file_info = pathinfo($filename);
		return $file_info['extension'];
	}

	/**
	 * Check for valid filename.
	 * For file name pattern see here, the function 'process_header_css' in the file 'class-wp-optimize-minify-front-end.php' where the file name is constructed. You can find' WP_Optimize_Minify_Print::write_combined_asset' and go to the passed $file variable where it's defined or constructed.
	 *
	 * @param string $filename
	 * @return bool
	 */
	private function is_valid_filename($filename) {
		if (preg_match('/^[a-zA-Z0-9.-]*$/', $filename)) {
			return true;
		}
		return false;
	}
}
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if (!defined('ABSPATH')) die('No direct access allowed');

// handle better utf-8 and unicode encoding
if (function_exists('mb_internal_encoding')) {
	mb_internal_encoding('UTF-8');
}

// must have
// phpcs:disable
// Squiz.PHP.DiscouragedFunctions.Discouraged -- Not applicable here
ini_set('pcre.backtrack_limit', 5000000);
ini_set('pcre.recursion_limit', 5000000);
// phpcs:enable
	
use MatthiasMullie\Minify;

class WP_Optimize_Minify_Functions {

	/**
	 * Applies `strip_tags` function for given array of messages
	 *
	 * @param array  $messages     Array of messages
	 * @param string $allowed_tags Tags to retain in message (optional)
	 *
	 * @return array
	 */
	public static function apply_strip_tags_for_messages_array($messages, $allowed_tags = '<strong>') {
		return array_map(function($message) use ($allowed_tags) {
			return strip_tags($message, $allowed_tags);
		}, $messages);
	}

	/**
	 * Detect external or internal scripts
	 *
	 * @param string $src
	 * @return boolean
	 */
	public static function is_local_domain($src) {
		$wpo_minify_options = wp_optimize_minify_config()->get();

		$locations = array(home_url(), site_url(), network_home_url(), network_site_url());
		$async_using_js = 'all' === $wpo_minify_options['enable_defer_js'] && 'async_using_js' === $wpo_minify_options['defer_js_type'];
		
		// excluded from cdn because of https://www.chromestatus.com/feature/5718547946799104 (we use document.write to preserve render blocking)
		if (!empty($wpo_minify_options['cdn_url'])
			&& (!$async_using_js || $wpo_minify_options['cdn_force'])
		) {
			array_push($locations, $wpo_minify_options['cdn_url']);
		}

		// cleanup locations
		$locations = array_filter(array_unique($locations));

		// external or not?
		$ret = false;
		foreach ($locations as $l) {
			$l = preg_replace('/^https?:\/\//i', '', trim($l));
			$l = trim(trim(preg_replace('/^www./', '', $l), '/'));
			if (stripos($src, $l) !== false && false === $ret) {
				$ret = true;
			}
		}

		// response
		return $ret;
	}

	/**
	 * Functions, get hurl info
	 *
	 * @param mixed $src
	 *
	 * @return string
	 */
	public static function get_hurl($src) {
		$wp_home = site_url();
		$wp_domain = trim(str_ireplace(array('http://', 'https://'), '', trim($wp_home, '/')));
		// preserve empty source handles
		$hurl = null === $src ? '' : trim($src);
		if (empty($hurl)) {
			return $hurl;
		}

		// some fixes
		$hurl = str_ireplace(array('&#038;', '&amp;'), '&', $hurl);

		if (is_ssl()) {
			$protocol = 'https://';
		} else {
			$protocol = 'http://';
		}

		// make sure wp_home doesn't have a forward slash
		$wp_home = rtrim($wp_home, '/');

		// apply some filters
		if (substr($hurl, 0, 2) === "//") {
			$hurl = $protocol.ltrim($hurl, "/");
		}//end if
		if (substr($hurl, 0, 4) === "http" && stripos($hurl, $wp_domain) === false) {
			return $hurl;
		}//end if
		if (substr($hurl, 0, 4) !== "http" && stripos($hurl, $wp_domain) !== false) {
			$hurl = $wp_home.'/'.ltrim($hurl, "/");
		}//end if

		// prevent double forward slashes in the middle
		$hurl = str_ireplace('###', '://', str_ireplace('//', '/', str_ireplace('://', '###', $hurl)));

		// consider different wp-content directory
		$proceed = 0;
		if (!empty($wp_home)) {
			$alt_wp_content = basename($wp_home);
			if (substr($hurl, 0, strlen($alt_wp_content)) === $alt_wp_content) {
				$proceed = 1;
			}
		}

		// Get the name of the WP-CONTENT folder. Default is wp-content, but can be changed by the user.
		$wp_content_folder = str_replace(ABSPATH, '', WP_CONTENT_DIR);

		// protocol + home for relative paths
		if ("/".WPINC === substr($hurl, 0, 12)
			|| "/wp-admin" === substr($hurl, 0, 9)
			|| "/$wp_content_folder" === substr($hurl, 0, 11)
			|| 1 == $proceed
		) {
			$hurl = $wp_home.'/'.ltrim($hurl, "/");
		}

		// make sure there is a protocol prefix as required
		$hurl = $protocol.preg_replace('/^https?:\/\//i', '', $hurl); // enforce protocol

		// no query strings
		if (stripos($hurl, '.js?v') !== false) {
			$hurl = stristr($hurl, '.js?v', true).'.js';
		}//end if
		if (stripos($hurl, '.css?v') !== false) {
			$hurl = stristr($hurl, '.css?v', true).'.css';
		}//end if

		return $hurl;
	}

	/**
	 * Check if it's an internal url or not
	 *
	 * @param string $hurl
	 * @param string $wp_home
	 * @param mixed  $noxtra
	 * @return boolean
	 */
	public static function internal_url($hurl, $wp_home, $noxtra = null) {
		$wpo_minify_options = wp_optimize_minify_config()->get();

		if (substr($hurl, 0, strlen($wp_home)) === $wp_home) {
			return true;
		}
		if (stripos($hurl, $wp_home) !== false) {
			return true;
		}
		if (isset($_SERVER['HTTP_HOST']) && stripos($hurl, preg_replace('/:\d+$/', '', sanitize_text_field(wp_unslash($_SERVER['HTTP_HOST'])))) !== false) {
			return true;
		}
		if (isset($_SERVER['SERVER_NAME']) && stripos($hurl, preg_replace('/:\d+$/', '', sanitize_text_field(wp_unslash($_SERVER['SERVER_NAME'])))) !== false) {
			return true;
		}
		if (isset($_SERVER['SERVER_ADDR']) && '::1' != sanitize_text_field(wp_unslash($_SERVER['SERVER_ADDR'])) && stripos($hurl, preg_replace('/:\d+$/', '', sanitize_text_field(wp_unslash($_SERVER['SERVER_ADDR'])))) !== false) {
			return true;
		}

		// allow specific external urls to be merged
		if (null === $noxtra) {
			$merge_allowed_urls = array_map('trim', explode("\n", $wpo_minify_options['merge_allowed_urls']));
			if (is_array($merge_allowed_urls) && strlen(implode($merge_allowed_urls)) > 0) {
				foreach ($merge_allowed_urls as $e) {
					if (stripos($hurl, $e) !== false && !empty($e)) {
						return true;
					}
				}
			}
		}

		return false;
	}

	/**
	 * Case-insensitive in_array() wrapper
	 *
	 * @param string $hurl
	 * @param array  $ignore
	 * @return boolean
	 */
	public static function in_arrayi($hurl, $ignore) {
		$hurl = preg_replace('/^https?:\/\//i', '//', $hurl); // better compatibility
		$hurl = strtok(urldecode(rawurldecode($hurl)), '?'); // no query string, decode entities
		
		if (!empty($hurl) && is_array($ignore)) {
			foreach ($ignore as $i) {
				$i = preg_replace('/^https?:\/\//i', '//', $i); // better compatibility
				$i = strtok(urldecode(rawurldecode($i)), '?'); // no query string, decode entities
				$i = trim(trim(trim(rtrim($i, '/')), '*')); // wildcard char removal
				if (!empty($i) && false !== stripos($hurl, $i)) {
					return true;
				}
			}
		}
		return false;
	}

	/**
	 * Check if selected url is point to already minifiled css/js file
	 *
	 * @param string $url
	 * @return bool
	 */
	public static function is_minified_css_js_filename($url) {
		$parts = wp_parse_url($url);
		if (empty($parts['path']) || !is_string(basename($parts['path']))) return false;
		return 1 === preg_match('/\.min\.(js|css)$/i', basename($parts['path']));
	}

	/**
	 * Better compatibility urls + fix w3.org NamespaceAndDTDIdentifiers
	 *
	 * @param string $code
	 * @return string
	 * */
	private static function compat_urls($code) {
		$wpo_minify_options = wp_optimize_minify_config()->get();
		$default_protocol = $wpo_minify_options['default_protocol'];
		if ('dynamic' == $default_protocol) {
			if ((isset($_SERVER['HTTPS']) && ('on' == $_SERVER['HTTPS'] || 1 == $_SERVER['HTTPS']))
				|| (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && 'https' == $_SERVER['HTTP_X_FORWARDED_PROTO'])
			) {
				$default_protocol = 'https://';
			} else {
				$default_protocol = 'http://';
			}
		} else {
			$default_protocol = $default_protocol.'://';
		}
		$code = preg_replace('/^https?:\/\//i', $default_protocol, $code);
		$code = str_ireplace($default_protocol.'www.w3.org', 'http://www.w3.org', $code);
		return $code;
	}

	/**
	 * Minify css string with PHP Minify
	 *
	 * @param string $css
	 * @return string
	 */
	public static function minify_css_string($css) {
		$css = apply_filters('wpo_minify_css_string', $css);
		$minifier = new Minify\CSS($css);
		$minifier->setMaxImportSize(15); // [css only] embed assets up to 15 Kb (default 5Kb) - processes gif, png, jpg, jpeg, svg & woff
		$min = $minifier->minify();
		if (false !== $min) {
			return self::compat_urls($min);
		}
		return self::compat_urls($css);
	}

	/**
	 * Minify js on demand (one file at one time, for compatibility)
	 *
	 * @param string  $url
	 * @param string  $js
	 * @param boolean $enable_js_minification
	 * @return string
	 */
	public static function get_js($url, $js, $enable_js_minification) {
		$wpo_minify_options = wp_optimize_minify_config()->get();

		// exclude minification on already minified files + jquery (because minification might break those)
		$excl = array('jquery.js', '.min.js', '-min.js', '/uploads/fusion-scripts/', '/min/', '.packed.js', '/includes/builder/scripts/');
		foreach ($excl as $e) {
			if (stripos(basename($url), $e) !== false) {
				$enable_js_minification = false;
				break;
			}
		}

		$encoding = mb_detect_encoding($js);

		// remove BOM
		$js = self::remove_utf8_bom($js);

		self::maybe_log_error_message($url, $encoding, $js);

		// minify JS
		if ($enable_js_minification) {
			$js = self::minify_js_string($js);
		} else {
			$js = self::compat_urls($js);
		}

		// Remove source mapping files
		$js = preg_replace('/(\/\/\s*[#]\s*sourceMappingURL\s*[=]\s*)(.+)\s*/ui', '', $js);

		// needed when merging js files
		$js = trim($js);
		if (substr($js, -1) != ';') {
			$js = $js.';';
		}
		if ($wpo_minify_options['debug']) {
			$js = '/* info: ' . $url . ' */' . "\n" . $js;
		}

		/**
		 * Filters the imported JavaScript
		 *
		 * @param string  $js                     - The imported JS
		 * @param string  $url                    - The imported url
		 * @param boolean $enable_js_minification - Whether to minify or not
		 */
		return apply_filters('wpo_minify_get_js', $js . "\n", $url, $enable_js_minification);
	}

	/**
	 * Minify JS string with PHP Minify or YUI Compressors
	 *
	 * @param string $js
	 * @return string
	 */
	public static function minify_js_string($js) {
		$js = apply_filters('wpo_minify_js_string', $js);
		// PHP Minify from https://github.com/matthiasmullie/minify
		$minifier = new Minify\JS($js);
		$min = $minifier->minify();
		if (false !== $min && (strlen(trim($js)) == strlen(trim($min)) || strlen(trim($min)) > 0)) {
			return self::compat_urls($min);
		}
		
		// if we are here, something went  wrong and minification didn't work
		$js = "\n/*! wpo_min: Minification of the following section failed, so it has been merged instead. */\n".$js;
		return self::compat_urls($js);
	}

	/**
	 * Wrapper to minify the inlined JS string - Adds an extra check for JSON
	 *
	 * @param string $js
	 * @return string
	 */
	public static function minify_inline_js($js) {
		$js = apply_filters('wpo_minify_inline_js_string', $js);
		// Do not minify JSON (JS minification will minify `true` to `!0`, which will break the JSON)
		if (json_decode($js)) return $js;
		return self::minify_js_string($js, true);
	}

	/**
	 * Functions, minify html
	 *
	 * @param string $html
	 * @return string
	 */
	public static function minify_html($html) {
		$minify_css = wp_optimize_minify_config()->get('enable_css_minification');
		$minify_js = wp_optimize_minify_config()->get('enable_js_minification');
		$options = array();
		if ($minify_css && apply_filters('wpo_minify_inline_css', true)) {
			$options['cssMinifier'] = array('WP_Optimize_Minify_Functions', 'minify_css_string');
		}
		if ($minify_js && apply_filters('wpo_minify_inline_js', true)) {
			$options['jsMinifier'] = array('WP_Optimize_Minify_Functions', 'minify_inline_js');
		}
		return Minify_HTML::minify($html, $options);
	}

	/**
	 * Functions to minify HTML
	 *
	 * @param string $html
	 * @return string
	 */
	public static function html_compression_finish($html) {
		return self::minify_html($html);
	}

	/**
	 * Start the compression
	 *
	 * @return void
	 */
	public static function html_compression_start() {
		if (self::exclude_contents() == true) {
			return;
		}
		ob_start(array(__CLASS__, 'html_compression_finish'));
	}

	/**
	 * Remove default HTTP headers
	 *
	 * @return void
	 */
	public static function remove_redundant_shortlink() {
		remove_action('wp_head', 'wp_shortlink_wp_head', 10);
		remove_action('template_redirect', 'wp_shortlink_header', 11);
	}

	/**
	 * Minify css on demand (one file at one time, for compatibility)
	 *
	 * @param string  $url
	 * @param string  $css
	 * @param boolean $enable_css_minification
	 * @return string
	 */
	public static function get_css($url, $css, $enable_css_minification) {
		$wpo_minify_options = wp_optimize_minify_config()->get();

		$encoding = mb_detect_encoding($css);

		// remove BOM
		$css = self::remove_utf8_bom($css);

		self::maybe_log_error_message($url, $encoding, $css);

		// fix url paths
		if (!empty($url)) {
			$css = self::make_css_urls_absolute($css, $url);
		}

		$css = str_ireplace('@charset "UTF-8";', '', $css);

		// remove query strings from fonts (for better seo, but add a small cache buster based on most recent updates)
		// last update or zero
		$cache_time = $wpo_minify_options['last-cache-update'];
		// fonts cache buster
		$css = preg_replace('/(.eot|.woff2|.woff|.ttf)+[?+](.+?)(\)|\'|\")/ui', "$1"."#".$cache_time."$3", $css);
		// Remove Sourcemappingurls
		$css = preg_replace('/(\/\*\s*[#]\s*sourceMappingURL\s*[=]\s*)(.[^*]+)\s*\*\//ui', '', $css);
		// If @import is found, process it/them
		if (false !== strpos($css, '@import')) $css = self::replace_css_import($css, $url);

		// minify CSS
		if ($enable_css_minification) {
			$css = self::minify_css_string($css);
		} else {
			$css = self::compat_urls($css);
		}

		// cdn urls
		$cdn_url = $wpo_minify_options['cdn_url'];
		if (!empty($cdn_url)) {
			$wp_domain = trim(preg_replace('/^https?:\/\//i', '', trim(site_url(), '/')));
			$cdn_url = trim(trim(preg_replace('/^https?:\/\//i', '', trim($cdn_url, '/'))), '/');
			$css = str_ireplace($wp_domain, $cdn_url, $css);
		}

		// add css comment
		$css = trim($css);
		if ($wpo_minify_options['debug']) {
			$css = '/* info: ' . $url . ' */' . "\n" . trim($css);
		}

		/**
		 * Filters the imported CSS
		 *
		 * @param string  $css                     - The imported CSS
		 * @param string  $url                     - The imported url
		 * @param boolean $enable_css_minification - Whether to minify or not
		 */
		return apply_filters('wpo_minify_get_css', $css, $url, $enable_css_minification);
	}

	/**
	 * Adds full path to relative url() rules
	 *
	 * @param string $css - The CSS to process
	 * @param string $url - The URL or the CSS being processed
	 * @return string
	 */
	public static function make_css_urls_absolute($css, $url) {
		$matches = array();
		preg_match_all("/url\(\s*['\"]?(?!data:)(?!http)(?![\/'\"])(.+?)['\"]?\s*\)/ui", $css, $matches);
		foreach ($matches[1] as $a) {
			$b = trim($a);
			if ($b != $a) {
				$css = str_replace($a, $b, $css);
			}
		}
		return preg_replace("/url\(\s*['\"]?(?!data:)(?!http)(?![\/'\"])(.+?)['\"]?\s*\)/ui", "url(".dirname($url)."/$1)", $css);
	}

	/**
	 * Include @import[ed] files - The @import statement can only be used at the top of a file, which breaks when merging everything.
	 *
	 * @param string $css      - The original CSS containing the @import statement
	 * @param string $file_url - The original CSS' URL
	 * @return string
	 */
	public static function replace_css_import($css, $file_url) {
		$remove_print_mediatypes = wp_optimize_minify_config()->get('remove_print_mediatypes');
		$debug = wp_optimize_minify_config()->get('debug');
		return preg_replace_callback('/(?:@import)\s(?:url\()?\s?["\'](.*?)["\']\s?\)?(?:[^;]*);?/im', function($matches) use ($file_url, $remove_print_mediatypes, $debug) {
			// @import contains url()
			if (preg_match('/url\s*\((.[^\)]*)[\)*?](.*);/', $matches[0], $url_matches)) {
				$url = trim(str_replace(array('"', "'"), '', $url_matches[1]));
				$media_query = trim($url_matches[2]);
			// @import uses quotes only
			} elseif (preg_match('/["\'](.*)["\'](.*);?/', $matches[0], $no_url_matches)) {
				$url = trim($no_url_matches[1]);
				$media_query = trim($no_url_matches[2], ") ;");
			}
			
			// If $media_query contains print, and $remove_print_mediatypes is true, return empty string
			if ($remove_print_mediatypes && false !== strpos($media_query, 'print') && apply_filters('wpo_minfy_remove_print_mediatypes_import', true, $url, $media_query, $matches[0], $file_url)) return ($debug ? '/*! Info: the import of "'.$url.'" was removed because the setting remove_print_mediatypes is enabled. */' : '');

			$purl = wp_parse_url($url);
			// If there's no host, the url is relative to $file_url, so prepend with the base url.
			if (!isset($purl['host'])) {
				$url = dirname($file_url).'/'.$url;
			}

			// Download @import
			$asset_content = WP_Optimize_Minify_Functions::get_asset_content($url);
			$content = $asset_content['content'];
			
			if (!$content) return '';

			// Fix the URLs
			$content = WP_Optimize_Minify_Functions::make_css_urls_absolute($content, $url);

			if ($media_query) {
				// Wrap the code with the media query
				$content = "@media $media_query {\n$content\n}";
			}

			if ($debug) {
				$content = "/*! CSS import Information: code imported from $url */\n$content\n/*! END CSS import Information */";
			}
			
			// If the code contains its own @import, recursively include it.
			if (false !== strpos($content, '@import')) {
				return WP_Optimize_Minify_Functions::replace_css_import($content, $url);
			}

			return $content;
		}, $css);
	}

	/**
	 * Download and cache css and js files
	 *
	 * @param string  $hurl
	 * @param string  $inline
	 * @param boolean $enable_minification
	 * @param string  $type
	 * @param string  $handle
	 * @return boolean|string
	 */
	public static function download_and_minify($hurl, $inline, $enable_minification, $type, $handle, $version = '') {
		// must have
		if (is_null($hurl) || empty($hurl)) {
			return false;
		}
		if (!in_array($type, array('js', 'css'))) {
			return false;
		}

		$wpo_minify_options = wp_optimize_minify_config()->get();

		// filters and defaults
		$print_url = str_ireplace(array(site_url(), home_url(), 'http:', 'https:'), '', $hurl);

		$log = array(
			'url' => $print_url,
		);

		// defaults
		if (false != $enable_minification) {
			$enable_minification = true;
		}
		if (is_null($inline) || empty($inline)) {
			$inline = '';
		}
		$print_handle = '';
		if (is_null($handle) || empty($handle)) {
			$handle = '';
		} else {
			$print_handle = "[$handle]";
		}

		// debug request
		$dreq = array(
			'hurl' => $hurl,
			'inline' => $inline,
			'enable_minification' => $enable_minification,
			'type' => $type,
			'handle' => $handle,
			'version' => $version
		);

		$asset_content = self::get_asset_content($hurl);
		$code = $asset_content['content'];

		// If $code is empty:
		if (!$code) {
			$log['success'] = false;
			if ($wpo_minify_options['debug']) {
				$log['debug'] = "$print_handle failed. Tried wp_remote_get and local file_get_contents.";
			}
			$return = array('request' => $dreq, 'log' => $log, 'code' => '', 'status' => false);
			return wp_json_encode($return);
		}

		if ('js' == $type) {
			$code = self::get_js($hurl, $code, $enable_minification);
		} else {
			$code = self::get_css($hurl, $code.$inline, $enable_minification);
		}

		// log, save and return
		if ($wpo_minify_options['debug']) {
			$version_msg = ('' != $version) ? "[Version: $version]" : "";
			$log['debug'] = $print_handle . $version_msg . ' was '.('local' === $asset_content['method'] ? 'opened' : 'fetched').' from '.$hurl;
		}
		$log['success'] = true;
		$return = array('request' => $dreq, 'log' => $log, 'code' => $code, 'status' => true);
		return wp_json_encode($return);
	}

	/**
	 * Get the content of an asset, whether local or remote
	 *
	 * @param string $url
	 * @return array
	 */
	public static function get_asset_content($url) {

		$wp_home = site_url();
		$wp_domain = wp_parse_url($wp_home, PHP_URL_HOST);
		// If the file is local.
		if (false !== stripos($url, $wp_domain)) {
			// default
			$f = str_ireplace(rtrim($wp_home, '/'), rtrim(ABSPATH, '/'), $url);
			// failover when home_url != site_url
			if (!file_exists($f)) {
				$nhurl = str_ireplace(site_url(), home_url(), $url);
				$f = str_ireplace(rtrim($wp_home, '/'), rtrim(ABSPATH, '/'), $nhurl);
			}
			clearstatcache();
			if (file_exists($f)) {
				$content = file_get_contents($f);
				// check for php code, skip if found
				if ("<?php" != strtolower(substr($content, 0, 5)) && false === stripos($content, "<?php")) {
					return array('content' => $content, 'method' => 'local');
				}
			}
		}


		// else, fallback to remote urls (or windows)
		$content = self::download_remote($url);
		if (false !== $content
			&& !empty($content)
			&& strtolower(substr($content, 0, 9)) != "<!doctype"
		) {
			// check if we got HTML instead of js or css code
			return array('content' => $content, 'method' => 'remote');
		}


		// fallback when home_url != site_url
		if (stripos($url, $wp_domain) !== false && home_url() != site_url()) {
			$nhurl = str_ireplace(site_url(), home_url(), $url);
			$content = self::download_remote($nhurl);
			if (false !== $content && !empty($content) && '<!doctype' != strtolower(substr($content, 0, 9))) {
				return array('content' => $content, 'method' => 'remote');
			}
		}
		
		return array('content' => '', 'method' => 'none');
	}

	/**
	 * Remove emoji support
	 *
	 * @return void
	 */
	public static function disable_wp_emojicons() {
		remove_action('wp_head', 'print_emoji_detection_script', 7);
		remove_action('admin_print_scripts', 'print_emoji_detection_script');
		remove_action('wp_print_styles', 'print_emoji_styles');
		remove_action('wp_enqueue_scripts', 'wp_enqueue_emoji_styles');
		remove_action('admin_print_styles', 'print_emoji_styles');
		remove_action('admin_enqueue_scripts', 'wp_enqueue_emoji_styles');
		remove_filter('the_content_feed', 'wp_staticize_emoji');
		remove_filter('comment_text_rss', 'wp_staticize_emoji');
		remove_filter('wp_mail', 'wp_staticize_emoji_for_email');
	}

	/**
	 * Remove from tinymce
	 *
	 * @return array
	 */
	public static function disable_emojis_tinymce($plugins) {
		if (is_array($plugins)) {
			return array_diff($plugins, array('wpemoji'));
		} else {
			return array();
		}
	}

	/**
	 * Remove UTF8 BOM.
	 * Returns BOM removed string or null when `$string` does not have a recognised encoding
	 *
	 * @param string $string
	 * @return string|null
	 */
	public static function remove_utf8_bom($string) {
		$bom = pack('H*', 'EFBBBF');
		return preg_replace("/^$bom/ui", '', $string);
	}

	/**
	 * Remove query string from static css files
	 *
	 * @param string $src
	 * @return string
	 */
	public static function remove_cssjs_ver($src) {
		if (stripos($src, '?ver=')) {
			$src = remove_query_arg('ver', $src);
		}
		return $src;
	}

	/**
	 * Rewrite cache files to http, https or dynamic
	 *
	 * @param string $url
	 * @return string
	 */
	public static function get_protocol($url) {
		$wp_domain = trim(preg_replace('/^https?:\/\//i', '', trim(site_url(), '/')));
		$wpo_minify_options = wp_optimize_minify_config()->get();
		$default_protocol = $wpo_minify_options['default_protocol'];

		$url = ltrim(preg_replace('/^https?:\/\//i', '', $url), '/'); // better compatibility

		// cdn support
		$cdn_url = $wpo_minify_options['cdn_url'];
		$cdn_url = trim(trim(preg_replace('/^https?:\/\//i', '', trim($cdn_url, '/'))), '/');
		
		// process cdn rewrite
		if (!empty($cdn_url) && self::is_local_domain($url) !== false) {
			
			// for js files, we need to consider thew defer for insights option
			if (substr($url, -3) == '.js') {
				$async_using_js = 'all' === $wpo_minify_options['enable_defer_js'] && 'async_using_js' === $wpo_minify_options['defer_js_type'];
				if (!$async_using_js
					|| $wpo_minify_options['cdn_force']
				) {
					$url = str_ireplace($wp_domain, $cdn_url, $url);
				}
			} else {
				$url = str_ireplace($wp_domain, $cdn_url, $url);
			}
		}

		// enforce protocol if needed
		if ('dynamic' == $default_protocol) {
			if ((isset($_SERVER['HTTPS']) && ('on' == $_SERVER['HTTPS'] || 1 == $_SERVER['HTTPS']))
				|| (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && 'https' == $_SERVER['HTTP_X_FORWARDED_PROTO'])
			) {
				$default_protocol = 'https://';
			} else {
				$default_protocol = 'http://';
			}
		} else {
			$default_protocol = $default_protocol.'://';
		}
		
		// return
		return $default_protocol . $url;
	}

	/**
	 * Exclude processing from some pages / posts / contents
	 *
	 * @return boolean
	 */
	public static function exclude_contents() {
		// prevent execution for specific urls
		if (isset($_SERVER['REQUEST_URI']) && !empty($_SERVER['REQUEST_URI'])) {
			$disable_on_url = array_filter(array_map('trim', explode("\n", get_option('wpo_min_disable_on_url', ''))));
			foreach ($disable_on_url as $url) {
				if (wp_parse_url(esc_url_raw(wp_unslash($_SERVER['REQUEST_URI'])), PHP_URL_PATH) == $url) {
					return true;
				}
			}
		}
	
		// for compatibility, let's always skip the checkout page
		if (function_exists('is_checkout') && is_checkout() === true) {
			return true;
		}

		// exclude processing here
		if (is_feed()
			|| is_admin()
			|| is_preview()
			|| (function_exists('is_customize_preview') && is_customize_preview())
			|| (defined('DOING_AJAX') && DOING_AJAX)
			|| (function_exists('wp_doing_ajax') && wp_doing_ajax())
			|| (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE)
			|| (defined('WP_BLOG_ADMIN') && WP_BLOG_ADMIN)
			|| (defined('WP_NETWORK_ADMIN') && WP_NETWORK_ADMIN)
			|| (defined('WP_INSTALLING') && WP_INSTALLING)
			|| (defined('WP_IMPORTING') && WP_IMPORTING)
			|| (defined('WP_REPAIRING') && WP_REPAIRING)
			|| (defined('XMLRPC_REQUEST') && XMLRPC_REQUEST)
			|| (defined('SHORTINIT') && SHORTINIT)
			|| (defined('REST_REQUEST') && REST_REQUEST)
			|| (isset($_SERVER['REQUEST_METHOD']) && 'POST' === $_SERVER['REQUEST_METHOD'])
			|| (isset($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower(sanitize_text_field(wp_unslash($_SERVER['HTTP_X_REQUESTED_WITH']))) == 'xmlhttprequest')
			|| (isset($_SERVER['REQUEST_URI']) && (strtolower(substr(esc_url_raw(wp_unslash($_SERVER['REQUEST_URI'])), -4)) == '.txt' || strtolower(substr(esc_url_raw(wp_unslash($_SERVER['REQUEST_URI'])), -4)) == '.xml'))
		) {
			return true;
		}

		// phpcs:disable
		// WordPress.Security.NonceVerification.Recommended -- Using $_GET element only to compare, returns boolean
		// Thrive plugins and other post_types
		$arr = array('tve_form_type', 'tve_lead_shortcode', 'tqb_splash');
		foreach ($arr as $a) {
			if (isset($_GET['post_type']) && $a === $_GET['post_type']) {
				return true;
			}
		}

		// Thrive architect
		if (isset($_GET['tve']) && 'true' === $_GET['tve']) return true;
		

		if (is_array($_GET)) {
			foreach ($_GET as $k => $v) {
				if (is_string($v) && is_string($k)) {
					if (stripos($k, 'elementor') !== false || stripos($v, 'elementor') !== false) {
						return true;
					}
				}
			}
		}

		// Other _GET parameters
		if (is_array($_GET)) {
			$get_params = array_keys($_GET);
			$excluded_params = array(
				// customizer preview, visual composer
				'customize_theme',
				'preview_id',
				'preview',
				// Elementor
				'elementor-preview',
				// Divi builder
				'et_fb',
				'PageSpeed',
				// Brizy Editor
				'brizy-edit',
				'brizy-edit-iframe',
				// Beaver builder
				'fl_builder',
				'trp-edit-translation',
			);
			return (bool) count(array_intersect($excluded_params, $get_params));
		}
		// phpcs:enable

		/**
		 * Whether to exclude the content or not from the minifying process.
		 */
		return apply_filters('wpo_minify_exclude_contents', false);
	}

	/**
	 * Get the default files which are ignored / excluded from processing
	 *
	 * @return array
	 */
	public static function get_default_ignore() {
		/**
		 * Filters the default exclusions
		 *
		 * @param array The exclusions
		 * @return array
		 */
		return apply_filters('wp-optimize-minify-default-exclusions', array(
			'/genericons.css',
			'/Avada/assets/js/main.min.js',
			'/woocommerce-product-search/js/product-search.js',
			'/includes/builder/scripts/frontend-builder-scripts.js',
			'/assets/js/jquery.themepunch.tools.min.js',
			'/js/TweenMax.min.js',
			'/jupiter/assets/js/min/full-scripts',
			'/wp-content/themes/Divi/core/admin/js/react-dom.production.min.js',
			'/LayerSlider/static/layerslider/js/greensock.js',
			'/themes/kalium/assets/js/main.min.js',
			'/wp-includes/js/mediaelement/wp-mediaelement.min.js',
			'elementor-admin-bar',
			'pdfjs-dist',
			'wordpress-popular-posts',
			'uploads/bb-plugin/cache', // Beaver builder page specific pages
		));
	}

	/**
	 * Know files that should always be ignored
	 *
	 * @param array $ignore
	 * @return array
	 */
	public static function compile_ignore_list($ignore) {
		$ignore_list = self::get_default_ignore();
		$user_excluded_ignore_items = wp_optimize_minify_config()->get('ignore_list');
		if (is_array($user_excluded_ignore_items)) $ignore_list = array_diff($ignore_list, $user_excluded_ignore_items);
		if (is_array($ignore)) {
			$master_ignore = array_merge(array_map('strtolower', $ignore), array_map('strtolower', $ignore_list));
			return array_unique($master_ignore);
		} else {
			return $ignore_list;
		}
	}

	/**
	 * Get the files excluded for IE compatibility
	 *
	 * @return array
	 */
	public static function get_default_ie_blacklist() {
		/**
		 * Filters the default IE specific / blacklisted items
		 *
		 * @param array The blacklist
		 * @return array
		 */
		return apply_filters('wp-optimize-minify-blacklist', array(
			'/html5shiv.js',
			'/html5shiv-printshiv.min.js',
			'/excanvas.js',
			'/avada-ie9.js',
			'/respond.js',
			'/respond.min.js',
			'/selectivizr.js',
			'/Avada/assets/css/ie.css',
			'/html5.js',
			'/IE9.js',
			'/fusion-ie9.js',
			'/vc_lte_ie9.min.css',
			'/old-ie.css',
			'/ie.css',
			'/vc-ie8.min.css',
			'/mailchimp-for-wp/assets/js/third-party/placeholders.min.js',
			'/assets/js/plugins/wp-enqueue/min/webfontloader.js',
			'/a.optnmstr.com/app/js/api.min.js',
			'/pixelyoursite/js/public.js',
			'/assets/js/wcdrip-drip.js',
			'/instantpage.js',
		));
	}

	/**
	 * Get the files excluded for IE compatibility
	 *
	 * @return array
	 */
	public static function get_ie_blacklist() {
		$user_excluded_blacklist_items = wp_optimize_minify_config()->get('blacklist');
		$default_blacklist = self::get_default_ie_blacklist();
		if (!is_array($user_excluded_blacklist_items)) return $default_blacklist;
		return array_diff($default_blacklist, $user_excluded_blacklist_items);
	}

	/**
	 * IE only files that should always be ignored, without incrementing our groups
	 *
	 * @param string $url
	 * @return boolean
	 */
	public static function is_url_in_ie_blacklist($url) {
		// from the database
		$blacklist = self::get_ie_blacklist();
		// must have
		$blacklist[] = '/wpo_min/cache/';
		
		// is the url on our list and return
		$res = self::in_arrayi($url, $blacklist);
		if (true == $res) {
			return true;
		} else {
			return false;
		}
	}

	/**
	 * Download function with fallback
	 *
	 * @param string $url
	 * @return boolean
	 */
	public static function download_remote($url) {
		
		$args = array(
			// info (needed for google fonts woff files + hinted fonts) as well as to bypass some security filters
			'user-agent' => 'Mozilla/5.0 (Macintosh; Intel Mac OS X 11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.81 Safari/537.36',
			'timeout' => 7
		);

		// fetch via wordpress functions
		$response = wp_remote_get(
			$url,
			/**
			 * Filters the arguments passed to wp_remote_get when downloading the scripts.
			 *
			 * @param array  $args - The arguments filtered
			 * @param string $url  - The URL of the downloaded asset
			 * @return array
			 */
			apply_filters('wpo_minify_download_request_args', $args, $url)
		);

		$res_code = wp_remote_retrieve_response_code($response);
		if (200 == $res_code) {
			$data = wp_remote_retrieve_body($response);
			if (strlen($data) > 1) {
				return $data;
			}
		}
		
		return false;
	}

	/**
	 * Prepares the merged JavaScript
	 *
	 * @param string $script
	 * @param string $merged_url
	 * @return string
	 */
	public static function prepare_merged_js($script, $merged_url) {
		$enable_js_trycatch = wp_optimize_minify_config()->get('enable_js_trycatch');
		if ($enable_js_trycatch) {
			return 'try{'."\n".$script."\n".'}'."\n".'catch(e){console.error("WP-Optimize Minify: An error has occurred in the minified code. \n\n- Original script: '.esc_attr($merged_url).'\n- Error message: "+ e.message);}'."\n";
		}
		return $script;
	}

	/**
	 * Checks if an URL is a font-awesome resource (checks if it contains font-awesome or fontawesome)
	 *
	 * @param string $href
	 * @return boolean
	 */
	public static function is_font_awesome($href) {
		return (boolean) preg_match('/font[-_]?awesome/i', $href);
	}

	/**
	 * Checks if an URL is a google font resource
	 *
	 * @param string $href
	 * @return boolean
	 */
	public static function is_google_font($href) {
		return 'fonts.googleapis.com' === strtolower(wp_parse_url($href, PHP_URL_HOST));
	}

	/**
	 * Get the content of an asset, whether local or remote
	 *
	 * @param string $url
	 * @return int|false
	 */
	public static function get_file_size($url) {
		$original_url = $url;
		if (is_multisite()) {
			if (function_exists('get_main_site_id')) {
				$site_id = get_main_site_id();
			} else {
				$network = get_network();
				$site_id = $network->site_id;
			}
			switch_to_blog($site_id);
		}
		$upload_dir = wp_upload_dir();
		$uploads_url = trailingslashit($upload_dir['baseurl']);
		$uploads_dir = trailingslashit($upload_dir['basedir']);
		if (is_multisite()) {
			restore_current_blog();
		}
		$possible_urls = array(
			WP_CONTENT_URL => WP_CONTENT_DIR,
			WP_PLUGIN_URL => WP_PLUGIN_DIR,
			$uploads_url => $uploads_dir,
			get_template_directory_uri() => get_template_directory(),
			untrailingslashit(includes_url()) => ABSPATH . WPINC,
		);

		$file = false;
		foreach ($possible_urls as $possible_url => $path) {
			$pos = strpos($url, $possible_url);
			if (false !== $pos) {
				$file = substr_replace($url, $path, $pos, strlen($possible_url));
				break;
			}
		}
		if (is_string($file) && file_exists($file)) {
			return filesize($file);
		}

		return self::get_remote_file_size($original_url);
	}

	/**
	 * Get the file size of a file hosting in other servers
	 *
	 * @param string $url
	 * @return int|false
	 */
	public static function get_remote_file_size($url) {
		$args = array(
			// info (needed for google fonts woff files + hinted fonts) as well as to bypass some security filters
			'user-agent' => 'Mozilla/5.0 (Macintosh; Intel Mac OS X 11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.81 Safari/537.36',
			'timeout' => 7
		);

		// fetch via wordpress functions
		$response = wp_remote_get($url, $args);

		if (is_wp_error($response)) return false;

		if (!empty($response) && is_array($response) && isset($response['headers']['Content-Length'])) {
			return $response['headers']['Content-Length'];
		}

		return false;
	}

	/**
	 * Check if it is 'flatsome' handle
	 *
	 * @param string $handle Handle of enqueued css file
	 *
	 * @return bool
	 */
	public static function is_flatsome_handle($handle) {
		return 0 === strcmp('flatsome-googlefonts', $handle);
	}

	/**
	 * Fix google fonts url for 'flatsome' theme
	 *
	 * @param string $href Enqueued google fonts url
	 *
	 * @return string Fixed google fonts url
	 */
	public static function fix_flatsome_google_fonts_url($href) {
		// Get query from $href
		$query = wp_parse_url($href, PHP_URL_QUERY);
		$query_arr = explode('&', $query);

		// Separate 'family and display' arguments in query
		$family = str_replace('family=', '', $query_arr[0]);
		$display_type = $query_arr[1];
		
		// Remove empty fonts
		$font_families = explode('|', $family);
		$font_families = array_diff($font_families, array(':regular', 'initial', 'inherit', ''));
		
		$system_fonts = array('+apple+system', '-apple-system', 'BlinkMacSystemFont', 'Segoe+UI', 'Helvetica+Neue', 'sans+serif', 'sans-serif', 'Georgia', 'Times', 'Times+New+Roman', 'serif');
		$google_fonts = array();

		// URL may look like following, fix it
		// https://fonts.googleapis.com/css?family=-apple-system,+BlinkMacSystemFont,+%22Segoe+UI%22,+Roboto,+Oxygen-Sans,+Ubuntu,+Cantarell,+%22Helvetica+Neue%22,+sans-serif:regular,700,regular,700|Bebas+Neue:regular,regular&display=block
		// http://fonts.googleapis.com/css?family=Bellota:regular|:regular|Lato:regular|Creepster:regular&display=block
		// http://fonts.googleapis.com/css?family=Lora:regular,regular|initial|Lato:regular,regular|&display=swap

		foreach ($font_families as $font) {
			$font_variant = explode(':', $font);

			// Remove beginning '+'
			$font = str_replace(',+', ',', $font_variant[0]);

			// Replace '-' with '+
			$font = str_replace(array('-', ' '), '+', $font);

			// Remove '"' or '%22'
			$font = str_replace(array('%22', '"'), '', $font);
			$font_arr = explode(',', $font);
			$font_arr = array_diff($font_arr, $system_fonts);
			$variant = '';
			if (!empty($font_variant[1])) {
				$variant = implode(',', array_unique(explode(',', $font_variant[1])));
			}
			if (empty($variant)) {
				$variant = 'regular';
			}
			foreach ($font_arr as $font) {
				$google_fonts[] = $font . ':' . $variant;
			}
		}
		$protocol = is_ssl() ? 'https:' : 'http:';
		return $protocol . '//fonts.googleapis.com/css?family=' . implode('|', $google_fonts) . '&' . $display_type;
	}

	/**
	 * Get the file modification time
	 *
	 * @param string $asset_src
	 * @return string
	 */
	public static function get_modification_time($asset_src) {
		$hurl = self::get_hurl($asset_src);
		$abs_file_path = WP_Optimize_Utils::get_file_path($hurl);
		if (empty($abs_file_path)) return '';

		$modification_time = @filemtime($abs_file_path); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged -- Suppress E-Warning on failure
		return strval($modification_time);
	}

	/**
	 * When BOM removed code is null (due to unrecognised character encoding), logs error message
	 *
	 * @param string        $url      URL of the script/stylesheet
	 * @param string|false  $encoding Character encoding
	 * @param string|null   $code     Script/Stylesheet code
	 *
	 * @return void
	 */
	private static function maybe_log_error_message($url, $encoding, $code) {
		if (null === $code) {
			$message = "Minify: Could not process {$url}, it contains invalid characters. ";
			if (false === $encoding) {
				$message .= "Could not determine its character encoding.";
			}
			error_log($message); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_error_log -- Using for debugging purpose
		}
	}
}
������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������class-wp-optimize-minify.php������������������������������������������������������������������������0000644�����������������00000020620�15162435543�0012145 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������<?php
if (!defined('ABSPATH')) die('No direct access allowed');

define('WP_OPTIMIZE_MINIFY_VERSION', '2.6.5');
define('WP_OPTIMIZE_MINIFY_DIR', dirname(__FILE__));
if (!defined('WP_OPTIMIZE_SHOW_MINIFY_ADVANCED')) define('WP_OPTIMIZE_SHOW_MINIFY_ADVANCED', false);

class WP_Optimize_Minify {

	/**
	 * Minify commands object
	 *
	 * @var WP_Optimize_Minify_Commands
	 */
	public $minify_commands;

	/**
	 * @var bool
	 */
	private $enabled;

	/**
	 * Constructor - Initialize actions and filters
	 *
	 * @return void
	 */
	public function __construct() {

		$this->minify_commands = new WP_Optimize_Minify_Commands();

		if (!class_exists('WP_Optimize_Minify_Config')) {
			include WP_OPTIMIZE_MINIFY_DIR.'/class-wp-optimize-minify-config.php';
		}

		$this->enabled = wp_optimize_minify_config()->is_enabled();

		$this->load_admin();

		add_filter('wpo_cache_admin_bar_menu_items', array($this, 'admin_bar_menu'), 30, 1);
		
		if (WP_Optimize::is_premium()) {
			$this->load_premium();
		}

		/**
		 * Directory that stores the cache, including gzipped files and mobile specific cache
		 */
		if (!defined('WPO_CACHE_MIN_FILES_DIR')) define('WPO_CACHE_MIN_FILES_DIR', untrailingslashit(WP_CONTENT_DIR).'/cache/wpo-minify');
		if (!defined('WPO_CACHE_MIN_FILES_URL')) define('WPO_CACHE_MIN_FILES_URL', untrailingslashit(WP_CONTENT_URL).'/cache/wpo-minify');

		if (!class_exists('WP_Optimize_Minify_Cache_Functions')) {
			include WP_OPTIMIZE_MINIFY_DIR.'/class-wp-optimize-minify-cache-functions.php';
		}

		$this->load_frontend();

		// cron job to delete old wpo_min cache
		add_action('wpo_minify_purge_old_cache', array('WP_Optimize_Minify_Cache_Functions', 'purge_old'));
		
		add_action('init', array($this, 'schedule_or_unschedule_purge_old_cache_event'));

		// Handle minify cache purging.
		add_action('wp_loaded', array($this, 'handle_purge_minify_cache'));

	}

	/**
	 * Schedule or unschedule purge old cache event.
	 *
	 * @return void
	 */
	public function schedule_or_unschedule_purge_old_cache_event() {
		if ($this->enabled) {
			$this->schedule_purge_old_cache_event();
		} else {
			$this->unschedule_purge_old_cache_event();
		}
	}

	/**
	 * Returns singleton instance object
	 *
	 * @return WP_Optimize_Minify Returns `WP_Optimize_Minify` object
	 */
	public static function instance() {
		static $_instance = null;
		if (null === $_instance) {
			$_instance = new self();
		}
		return $_instance;
	}

	/**
	 * Admin toolbar processing
	 *
	 * @param array        $menu_items
	 * @return array
	 */
	public function admin_bar_menu($menu_items) {
		$wpo_minify_options = wp_optimize_minify_config()->get();

		if (!$wpo_minify_options['enabled'] || !current_user_can('manage_options') || !($wpo_minify_options['enable_css'] || $wpo_minify_options['enable_js'])) return $menu_items;
		
		$act_url = remove_query_arg('wpo_minify_cache_purged');
		$cache_path = WP_Optimize_Minify_Cache_Functions::cache_path();
		$cache_size_info = '<h4>'.__('Minify cache', 'wp-optimize').'</h4><span><span class="label">'.__('Cache size:', 'wp-optimize').'</span> <span class="stats">'.esc_html(WP_Optimize_Minify_Cache_Functions::get_cachestats($cache_path['cachedir'])).'</span></span>';

		$menu_items[] = array(
			'id'    => 'wpo_minify_cache_stats',
			'title' => $cache_size_info,
			'meta'  => array(
				'class' => 'wpo-cache-stats',
			),
			'parent' => 'wpo_purge_cache',
		);

		$menu_items[] = array(
			'parent' => 'wpo_purge_cache',
			'id' => 'purge_minify_cache',
			'title' => __('Purge minify cache', 'wp-optimize'),
			'href' => add_query_arg('_wpo_purge_minify_cache', wp_create_nonce('wpo_purge_minify_cache'), $act_url),
		);
		return $menu_items;
	}

	/**
	 * Check if purge single page action sent and purge cache.
	 */
	public function handle_purge_minify_cache() {
		$wpo_minify_options = wp_optimize_minify_config()->get();
		if (!$wpo_minify_options['enabled'] || !current_user_can('manage_options')) return;

		if (isset($_GET['wpo_minify_cache_purged'])) {
			if (is_admin()) {
				add_action('admin_notices', array($this, 'notice_purge_minify_cache_success'));
				return;
			} else {
				$message = __('Minify cache purged', 'wp-optimize');
				printf('<script>alert("%s");</script>', esc_html($message));
				return;
			}
		}

		if (!isset($_GET['_wpo_purge_minify_cache'])) return;
		
		if (wp_verify_nonce($_GET['_wpo_purge_minify_cache'], 'wpo_purge_minify_cache')) {
			$success = false;

			// Purge minify
			$results = $this->minify_commands->purge_minify_cache();
			if ("caches cleared" == $results['result']) $success = true;

			// remove nonce from url and reload page.
			wp_redirect(add_query_arg('wpo_minify_cache_purged', $success, remove_query_arg('_wpo_purge_minify_cache')));
			exit;

		}
	}

	/**
	 * Load the admin class
	 *
	 * @return void
	 */
	private function load_admin() {
		if (!is_admin()) return;
		new WP_Optimize_Minify_Admin();
	}

	/**
	 * Load the frontend class
	 *
	 * @return void
	 */
	private function load_frontend() {
		if ($this->enabled) {
			new WP_Optimize_Minify_Front_End();
		}
	}

	/**
	 * Load the premium class
	 *
	 * @return void
	 */
	private function load_premium() {
		new WP_Optimize_Minify_Premium();
	}

	/**
	 * Run during activation
	 * Increment cache first as it will save files to that dir
	 *
	 * @return void
	 */
	public function plugin_activate() {
		// increment cache time
		if (class_exists('WP_Optimize_Minify_Cache_Functions')) {
			WP_Optimize_Minify_Cache_Functions::cache_increment();
		}
	}

	/**
	 * If the WP cron event for scheduling purging of the minify cache does not exist, then create it
	 */
	private function schedule_purge_old_cache_event() {
		if (!wp_next_scheduled('wpo_minify_purge_old_cache')) {
			wp_schedule_event(time() + 43200, 'daily', 'wpo_minify_purge_old_cache');
		}
	}

	/**
	 * Unschedule purging of the minify cache
	 *
	 * @return void
	 */
	private function unschedule_purge_old_cache_event() {
		// old cache purge event cron
		wp_clear_scheduled_hook('wpo_minify_purge_old_cache');
	}
	
	/**
	 * Run during plugin deactivation
	 *
	 * @return void
	 */
	public function plugin_deactivate() {
		if (class_exists('WP_Optimize_Minify_Cache_Functions') && WP_Optimize()->get_page_cache()->should_purge) {
			WP_Optimize_Minify_Cache_Functions::purge_temp_files();
			WP_Optimize_Minify_Cache_Functions::purge_old();
			WP_Optimize_Minify_Cache_Functions::purge_others();
		}

		$this->unschedule_purge_old_cache_event();
	}

	/**
	 * Run during plugin uninstall
	 *
	 * @return void
	 */
	public function plugin_uninstall() {
		// remove options from DB
		if (!function_exists('wp_optimize_minify_config')) {
			include WP_OPTIMIZE_MINIFY_DIR.'/class-wp-optimize-minify-config.php';
		}
		wp_optimize_minify_config()->purge();
		// remove minified files
		if (class_exists('WP_Optimize_Minify_Cache_Functions')) {
			WP_Optimize_Minify_Cache_Functions::purge();
			WP_Optimize_Minify_Cache_Functions::purge_others();
		}
	}

	/**
	 * Shows success notice for purge minify cache
	 */
	public function notice_purge_minify_cache_success() {
		$this->show_notice(__('The minify cache was successfully purged.', 'wp-optimize'), 'success');
	}

	/**
	 * Show notification in WordPress admin.
	 *
	 * @param string $message HTML (no further escaping is performed)
	 * @param string $type    error, warning, success, or info
	 */
	public function show_notice($message, $type) {
		global $current_screen;
		
		if ($current_screen && is_callable(array($current_screen, 'is_block_editor')) && $current_screen->is_block_editor()) :
		?>
			<script>
				window.addEventListener('load', function() {
					(function(wp) {
						if (window.wp && wp.hasOwnProperty('data') && 'function' == typeof wp.data.dispatch) {
							wp.data.dispatch('core/notices').createNotice(
								'<?php echo esc_js($type); ?>',
								'<?php echo wp_kses_post($message); ?>',
								{
									isDismissible: true,
								}
							);
						}
					})(window.wp);
				});
			</script>
		<?php else : ?>
			<div class="notice wpo-notice notice-<?php echo esc_attr($type); ?> is-dismissible">
				<p><?php echo wp_kses_post($message); ?></p>
			</div>
		<?php
		endif;
	}

	/**
	 * Check if current user can purge cache.
	 *
	 * @return bool
	 */
	public function can_purge_cache() {
		$required_capability = is_multisite() ? 'manage_network_options' : 'manage_options';

		if (WP_Optimize::is_premium()) {
			return current_user_can($required_capability) || WP_Optimize_Premium()->can_purge_the_cache();
		} else {
			return current_user_can($required_capability);
		}
	}
}
����������������������������������������������������������������������������������������������������������������class-wp-optimize-minify-admin.php������������������������������������������������������������������0000644�����������������00000022745�15162435544�0013246 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������<?php
if (!defined('ABSPATH')) die('No direct access allowed');

class WP_Optimize_Minify_Admin {

	/**
	 * Initialize, add actions and filters
	 *
	 * @return void
	 */
	public function __construct() {
		// exclude processing for editors and administrators (fix editors)
		add_action('wp_optimize_admin_page_wpo_minify_status', array($this, 'check_permissions_admin_notices'));

		add_action('wp_optimize_admin_page_wpo_minify_status', array($this, 'admin_notices_activation_error'));

		add_action('admin_enqueue_scripts', array($this, 'admin_enqueue_scripts'));

		// This function runs when WordPress updates or installs/remove something. Forces new cache
		add_action('upgrader_process_complete', array('WP_Optimize_Minify_Cache_Functions', 'cache_increment'));
		// This function runs when an active theme or plugin is updated
		add_action('wpo_active_plugin_or_theme_updated', array('WP_Optimize_Minify_Cache_Functions', 'reset'));
		add_action('upgrader_overwrote_package', array('WP_Optimize_Minify_Cache_Functions', 'reset'));
		add_action('after_switch_theme', array('WP_Optimize_Minify_Cache_Functions', 'cache_increment'));
		add_action('updraftcentral_version_updated', array('WP_Optimize_Minify_Cache_Functions', 'reset'));
		add_action('elementor/editor/after_save', array('WP_Optimize_Minify_Cache_Functions', 'reset'));
		add_action('fusion_cache_reset_after', array('WP_Optimize_Minify_Cache_Functions', 'reset'));
		// Output asset preload placeholder, replaced by premium
		add_action('wpo_minify_settings_tabs', array($this, 'output_assets_preload_placeholder'), 10, 1);

		add_action('wp_optimize_register_admin_content', array($this, 'register_content'));
	}

	/**
	 * Register the content
	 *
	 * @return void
	 */
	public function register_content() {
		add_action('wp_optimize_admin_page_wpo_minify_status', array($this, 'output_status'), 20);
		add_action('wp_optimize_admin_page_wpo_minify_settings', array($this, 'output_settings'), 20);
		add_action('wp_optimize_admin_page_wpo_minify_advanced', array($this, 'output_advanced'), 20);
		add_action('wp_optimize_admin_page_wpo_minify_font', array($this, 'output_font_settings'), 20);
		add_action('wp_optimize_admin_page_wpo_minify_analytics', array($this, 'output_analytics_settings'), 20);
		add_action('wp_optimize_admin_page_wpo_minify_css', array($this, 'output_css_settings'), 20);
		add_action('wp_optimize_admin_page_wpo_minify_js', array($this, 'output_js_settings'), 20);
		add_action('wp_optimize_admin_page_wpo_minify_preload', array($this, 'output_preload_settings'), 20);
	}

	/**
	 * Load scripts for controlling the admin pages
	 *
	 * @param string $hook
	 * @return void
	 */
	public function admin_enqueue_scripts($hook) {
		$enqueue_version = WP_Optimize()->get_enqueue_version();
		$min_or_not_internal = WP_Optimize()->get_min_or_not_internal_string();
		if (preg_match('/wp\-optimize/i', $hook)) {
			wp_enqueue_script('wp-optimize-min-js', WPO_PLUGIN_URL.'js/minify' . $min_or_not_internal . '.js', array('jquery', 'wp-optimize-admin-js'), $enqueue_version, true);
		}
	}

	/**
	 * Conditionally runs upon the WP action admin_notices to display error
	 *
	 * @return void
	 */
	public function admin_notices_activation_error() {
		if (!extension_loaded('mbstring')) {
			echo '<div class="notice notice-error wpo-warning">';
			echo '<p>' . esc_html__('WP-Optimize Minify requires the PHP mbstring module to be installed on the server; please ask your web hosting company for advice on how to enable it on your server.', 'wp-optimize') . '</p>';
			echo '</div>';
		}
	}

	/**
	 * Display an admin notice if the user has inadequate filesystem permissions
	 *
	 * @return void
	 */
	public function check_permissions_admin_notices() {
		// get cache path
		$cache_path = WP_Optimize_Minify_Cache_Functions::cache_path();
		$cache_dir = $cache_path['cachedir'];
		if (is_dir($cache_dir) && !wp_is_writable($cache_dir)) {
			$chmod = substr(sprintf('%o', fileperms($cache_dir)), -4);
			?>
			<div class="notice notice-error wpo-warning">
				<p>
					<?php
						// translators: %s is a directory
						echo wp_kses_post(sprintf(__('WP-Optimize Minify needs write permissions on the folder %s.', 'wp-optimize'), "<strong>". esc_html($cache_dir)."</strong>"));
					?>
				</p>
			</div>
			<div class="notice notice-error wpo-warning">
				<p>
					<?php
						// translators: %s is a file permissions code
						echo wp_kses_post(sprintf(__('The current permissions for WP-Optimize Minify are chmod %s.', 'wp-optimize'), "<strong>" . esc_html($chmod) . "</strong>"));
					?>
				</p>
			</div>
			<div class="notice notice-error wpo-warning">
				<p>
					<?php
						// translators: %s is a file permissions code
						echo wp_kses_post(sprintf(__('If you need something more than %s for it to work, then your server is probably misconfigured.', 'wp-optimize'), '<strong>775</strong>'));
						echo " ";
						esc_html_e('Please contact your hosting provider.', 'wp-optimize');
					?>
				</p>
			</div>
			<?php
		}
	}

	/**
	 * Minify - Outputs the status tab
	 *
	 * @return void
	 */
	public function output_status() {
		$found_incompatible_plugins = WP_Optimize_Detect_Minify_Plugins::get_instance()->get_active_minify_plugins();
		$wpo_minify_options = wp_optimize_minify_config()->get();
		$cache_path = WP_Optimize_Minify_Cache_Functions::cache_path();
		WP_Optimize()->include_template(
			'minify/status-tab.php',
			false,
			array(
				'wpo_minify_options' => $wpo_minify_options,
				'show_information_notice' => !get_user_meta(get_current_user_id(), 'wpo-hide-minify-information-notice', true),
				'cache_dir' => $cache_path['cachedir'],
				'can_purge_the_cache' => WP_Optimize()->get_minify()->can_purge_cache(),
				'active_minify_plugins' => apply_filters('wpo_minify_found_incompatible_plugins', $found_incompatible_plugins),
			)
		);
	}

	/**
	 * Minify - Outputs the font settings tab
	 *
	 * @return void
	 */
	public function output_font_settings() {
		$wpo_minify_options = wp_optimize_minify_config()->get();
		WP_Optimize()->include_template(
			'minify/font-settings-tab.php',
			false,
			array(
				'wpo_minify_options' => $wpo_minify_options
			)
		);
	}
	
	/**
	 * Minify - Outputs the analytics settings tab
	 *
	 * @return void
	 */
	public function output_analytics_settings() {
		$config = wp_optimize_minify_config()->get();
		$id = isset($config['tracking_id']) ? $config['tracking_id'] : '';
		$method = isset($config['analytics_method']) ? $config['analytics_method'] : '';
		$is_enabled = isset($config['enable_analytics']) ? $config['enable_analytics'] : false;
	
		WP_Optimize()->include_template(
			'minify/analytics-settings-tab.php',
			false,
			array(
				'id' => $id,
				'method'=> $method,
				'is_enabled'=> $is_enabled
			)
		);
	}

	/**
	 * Minify - Outputs the CSS settings tab
	 *
	 * @return void
	 */
	public function output_css_settings() {
		$wpo_minify_options = wp_optimize_minify_config()->get();
		WP_Optimize()->include_template(
			'minify/css-settings-tab.php',
			false,
			array(
				'wpo_minify_options' => $wpo_minify_options
			)
		);
	}

	/**
	 * Minify - Outputs the JS settings tab
	 *
	 * @return void
	 */
	public function output_js_settings() {
		$wpo_minify_options = wp_optimize_minify_config()->get();
		WP_Optimize()->include_template(
			'minify/js-settings-tab.php',
			false,
			array(
				'wpo_minify_options' => $wpo_minify_options
			)
		);
	}

	/**
	 * Minify - Outputs the settings tab
	 *
	 * @return void
	 */
	public function output_settings() {
		$wpo_minify_options = wp_optimize_minify_config()->get();
		$url = wp_parse_url(get_home_url());
		WP_Optimize()->include_template(
			'minify/settings-tab.php',
			false,
			array(
				'wpo_minify_options' => $wpo_minify_options,
				'default_protocol' => $url['scheme']
			)
		);
	}

	/**
	 * Minify - Outputs the settings tab
	 *
	 * @return void
	 */
	public function output_assets_preload_placeholder($wpo_minify_options) {
		WP_Optimize()->include_template(
			'minify/asset-preload.php',
			false,
			array(
				'wpo_minify_options' => $wpo_minify_options
			)
		);
	}

	/**
	 * Minify - Outputs the preload tab
	 *
	 * @return void
	 */
	public function output_preload_settings() {
		$wpo_minify_preloader = WP_Optimize_Minify_Preloader::instance();
		$is_running = $wpo_minify_preloader->is_running();
		$status = $wpo_minify_preloader->get_status_info();
		$cache_config = WPO_Cache_Config::instance();
		WP_Optimize()->include_template(
			'minify/preload-tab.php',
			false,
			array(
				'is_cache_enabled' => $cache_config->get_option('enable_page_caching'),
				'is_running' => $is_running,
				'status_message' => isset($status['message']) ? $status['message'] : '',
			)
		);
	}

	/**
	 * Minify - Outputs the advanced tab
	 *
	 * @return void
	 */
	public function output_advanced() {
		$wpo_minify_options = wp_optimize_minify_config()->get();
		$files = false;
		if (apply_filters('wpo_minify_status_show_files_on_load', true)) {
			$files = WP_Optimize_Minify_Cache_Functions::get_cached_files();
		}

		// WP_Optimize_Minify_Functions is only loaded when Minify is active
		if (class_exists('WP_Optimize_Minify_Functions')) {
			$default_ignore = WP_Optimize_Minify_Functions::get_default_ignore();
			$default_ie_blacklist = WP_Optimize_Minify_Functions::get_default_ie_blacklist();
		} else {
			$default_ignore = array();
			$default_ie_blacklist = array();
		}

		WP_Optimize()->include_template(
			'minify/advanced-tab.php',
			false,
			array(
				'wpo_minify_options' => $wpo_minify_options,
				'files' => $files,
				'default_ignore' => $default_ignore,
				'default_ie_blacklist' => $default_ie_blacklist
			)
		);
	}
}
���������������������������class-wp-optimize-minify-front-end.php��������������������������������������������������������������0000644�����������������00000300421�15162435546�0014042 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������<?php

if (!defined('ABSPATH')) die('No direct access allowed');

class WP_Optimize_Minify_Front_End {

	private $collect_preload_js = array();
	
	private $collect_preload_css = array();

	private $collect_google_fonts = array();

	private $minify_cache_incremented = false;

	private $options = array();

	/**
	 * Initialize actions and filters
	 *
	 * @return void
	 */
	public function __construct() {
		$this->include_dependencies();
		$this->options = wp_optimize_minify_config()->get();

		// Main process
		add_action('wp', array($this, 'init'));
		
		// Beaver builder
		add_action('fl_builder_after_save_layout', array('WP_Optimize_Minify_Cache_Functions', 'reset'));

		// extra_preload_headers is currently not available to users
		// add_action('send_headers', array($this, 'extra_preload_headers'));

		if (!is_admin()) {
			add_action('wp_headers', array($this, 'add_caching_headers'));
		}
	}

	/**
	 * Fired on wp init
	 *
	 * @return void
	 */
	public function init() {
		/**
		 * Check whether Minify is run on the current page
		 */
		if (!$this->run_on_page()) return;

		if ($this->options['emoji_removal']) {
			$this->disable_emojis();
		}

		if ($this->options['clean_header_one']) {
			$this->remove_header_meta_info();
		}

		// Headers & Preload JS/CSS/Extra
		if ($this->options['enabled_css_preload'] || $this->options['enabled_js_preload']) {
			add_action('wp_footer', array($this, 'generate_preload_headers'), PHP_INT_MAX);
		}
		
		if ($this->options['enable_js']) {
			$this->process_js();
		}

		if ($this->options['enable_css']) {
			$this->process_css();
		}

		// Preload tags
		if (trim($this->options['hpreload'])) {
			add_action('wp_head', array($this, 'add_assets_preload'), 2);
		}

		if ($this->should_process_html()) {
			add_action('template_redirect', array('WP_Optimize_Minify_Functions', 'html_compression_start'));
		}

		if ($this->should_use_loadCSS()) {
			add_action('wp_footer', array('WP_Optimize_Minify_Print', 'add_load_css'), PHP_INT_MAX);
		}

		$this->remove_query_string_from_static_assets();
	}

	/**
	 * Detects whether cache preloading is running or not
	 *
	 * @return bool
	 */
	private function is_cache_preload() {
		return isset($_SERVER['HTTP_X_WP_OPTIMIZE_CACHE_PRELOAD']) && 0 === strcmp(sanitize_text_field(wp_unslash($_SERVER['HTTP_X_WP_OPTIMIZE_CACHE_PRELOAD'])), 'Yes');
	}

	/**
	 * Set initial values for the meta log object
	 *
	 * @param string $header - Info on time the log was processed
	 * @return array
	 */
	private function meta_log_initialization($header) {
		return array(
			'header' => $header,
			'invalidation_reason' => "",
			'files_that_changed' => array()
		);
	}

	/**
	 * Whether to run the feature on a page or not
	 *
	 * @param string $context - Optional, The context where the check is done
	 * @return boolean
	 */
	public function run_on_page($context = 'default') {
		/**
		 * Filters whether the functionality is ran on the current page.
		 *
		 * @param boolean $run_on_page
		 * @param string  $context - Optional, The feature where the check is done
		 */
		return apply_filters(
			'wpo_minify_run_on_page',
			!is_admin()
			&& (!defined('SCRIPT_DEBUG') || !SCRIPT_DEBUG)
			&& !is_preview()
			&& (!function_exists('is_customize_preview') || !is_customize_preview())
			&& !($this->options['disable_when_logged_in'] && is_user_logged_in())
			&& !(function_exists('is_amp_endpoint') && is_amp_endpoint())
			&& !WP_Optimize_Minify_Functions::exclude_contents(),
			$context
		);
	}

	/**
	 * Inline css in place, instead of inlining the large file
	 *
	 * @param String $html
	 * @param String $handle
	 * @param String $href
	 * @param String $media
	 *
	 * @return String
	 */
	public function inline_css($html, $handle, $href, $media) {
		$exclude_css = $this->get_excluded_css_list();
		$ignore_list = WP_Optimize_Minify_Functions::compile_ignore_list($exclude_css);
		$blacklist = WP_Optimize_Minify_Functions::get_ie_blacklist();
		$async_css = $this->get_async_css_list();
		$master_ignore = array_merge($ignore_list, $blacklist);

		// make sure href is complete
		$href = WP_Optimize_Minify_Functions::get_hurl($href);
		
		if ($this->options['debug']) {
			echo "<!-- wpo_min DEBUG: Inline CSS processing start ". esc_html($handle) . " / " . esc_html($href) . " -->\n";
		}
		

		// skip all this, if the async css option is enabled
		if ($this->options['loadcss']) return $html;
		// remove all css?
		if ($this->options['remove_css']) return false;
		// leave conditionals alone
		if (wp_styles()->get_data($handle, 'conditional')) return $html;
		
		// mediatype fix for some plugins + remove print mediatypes
		if ('screen' == $media
			|| 'screen, print' == $media
			|| empty($media)
			|| is_null($media)
			|| false == $media
		) {
			$media = 'all';
		}
		if (!empty($this->options['remove_print_mediatypes']) && 'print' == $media) {
			return false;
		}

		// Exclude specific CSS files from PageSpeedInsights?
		if (WP_Optimize_Minify_Functions::in_arrayi($href, $async_css)) {
			WP_Optimize_Minify_Print::exclude_style($href);
			return false;
		}

		// remove wpo_min from the ignore list
		$ignore_list = array_filter($ignore_list, array($this, 'check_wpo'));
		
		// return if in any ignore or black list
		if (count($master_ignore) > 0 && WP_Optimize_Minify_Functions::in_arrayi($href, $master_ignore)) {
			return $html;
		}

		// return if already minified
		if (WP_Optimize_Minify_Functions::is_minified_css_js_filename($href)) {
			return $html;
		}

		// check if working with a font awesom link
		if (WP_Optimize_Minify_Functions::is_font_awesome($href)) {
			// font awesome processing, async css
			if ('async' == $this->options['fawesome_method']) {
				WP_Optimize_Minify_Print::async_style($href, $media);
				return false;
			} elseif ('exclude' === $this->options['fawesome_method']) {
				// font awesome processing, async and exclude from PageSpeedIndex
				WP_Optimize_Minify_Print::exclude_style($href);
				return false;
			} elseif ('inline' == $this->options['fawesome_method']) {
				WP_Optimize_Minify_Print::inline_style($handle, $href);
				return false;
			}
		}

		// Check if working with google font url

		if ('fonts.googleapis.com' == wp_parse_url($href, PHP_URL_HOST)) {
			// if option disabled google fonts processing
			if ($this->options['disable_google_fonts_processing']) return $html;
			// check if google fonts should be removed
			if ($this->options['remove_googlefonts']) return false;
			// check if google fonts should be merged
			if ($this->options['merge_google_fonts']) {
				if (WP_Optimize_Minify_Functions::is_flatsome_handle($handle)) {
					$href = WP_Optimize_Minify_Functions::fix_flatsome_google_fonts_url($href);
					$this->collect_google_fonts[$handle] = $href;
				} else {
					$this->collect_google_fonts[$handle] = $href;
				}
				return false;
			} else {
				if ('inline' === $this->options['gfonts_method']) {
					if (WP_Optimize_Minify_Functions::is_flatsome_handle($handle)) {
						$href = WP_Optimize_Minify_Functions::fix_flatsome_google_fonts_url($href);
					}
					// download, minify, cache
					$tkey = 'css-'.hash('adler32', $handle.$href).'.css';
					$json = false;
					$json = WP_Optimize_Minify_Cache_Functions::get_transient($tkey);
					if (false === $json) {
						$json = WP_Optimize_Minify_Functions::download_and_minify($href, null, $this->options['enable_css_minification'], 'css', $handle);
						if ($this->options['debug']) {
							echo "<!-- wpo_min DEBUG: Uncached file processing now for " . esc_html($handle) . " / " . esc_html($href) . " -->\n";
						}
						WP_Optimize_Minify_Cache_Functions::set_transient($tkey, $json);
					}
					
					// decode
					$res = json_decode($json, true);

					// inline css or fail
					if (null !== $res && false != $res['status']) {
						// add font-display
						// https://developers.google.com/web/updates/2016/02/font-display
						$res['code'] = str_ireplace('font-style:normal;', 'font-display:block;font-style:normal;', $res['code']);

						echo '<style class="optimize_css_1" type="text/css" media="all">';
						echo $res['code']; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- This is already escaped
						echo '</style>' . "\n";
						return false;
					} else {
						if ($this->options['debug']) {
							echo "<!-- wpo_min DEBUG: Google fonts request failed for " . esc_html($href) . " -->\n";
						}
						return $html;
					}
				} elseif ('async' === $this->options['gfonts_method']) {
					WP_Optimize_Minify_Print::async_style($href);
					return false;
				} elseif ('exclude' === $this->options['gfonts_method']) {
					WP_Optimize_Minify_Print::exclude_style($href);
					return false;
				}
			}
		}

		// skip external scripts that are not specifically allowed
		if (false === WP_Optimize_Minify_Functions::internal_url($href, site_url()) || empty($href)) {
			if ($this->options['debug']) {
				echo "<!-- wpo_min DEBUG: Skipped the next external enqueued CSS -->\n";
			}
			return $html;
		}

		$file_size = WP_Optimize_Minify_Functions::get_file_size($href);

		// If we can't determine file size, then we still need to proceed with normal minify process
		if (apply_filters('wp_optimize_skip_inlining', false === $file_size || $file_size > 20480, $file_size, $href)) return $html;

		// download, minify, cache
		$tkey = 'css-'.hash('adler32', $handle.$href).'.css';
		$json = false;
		$json = WP_Optimize_Minify_Cache_Functions::get_transient($tkey);
		if (false === $json) {
			$json = WP_Optimize_Minify_Functions::download_and_minify($href, null, $this->options['enable_css_minification'], 'css', $handle);
			if ($this->options['debug']) {
				echo "<!-- wpo_min DEBUG: Uncached file processing now for " . esc_html($handle) . " / " . esc_html($href) . " -->" . "\n";
			}
			WP_Optimize_Minify_Cache_Functions::set_transient($tkey, $json);
		}
		
		// decode
		$res = json_decode($json, true);
		
		// inline it + other inlined children styles
		if (null !== $res && false != $res['status']) {
			echo '<style class="optimize_css_2" type="text/css" media="'.esc_attr($media).'">';
			echo $res['code'];  // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- This is already escaped
			echo '</style>' . "\n";
			
			// get inline_styles for this handle, minify and print
			$inline_styles = array();
			$inline_styles = wp_styles()->get_data($handle, 'after');
			if (false != $inline_styles) {

				// string type
				if (is_string($inline_styles)) {
					$code = WP_Optimize_Minify_Functions::get_css($href, $inline_styles, $this->options['enable_css_minification']);
					if (!empty($code) && false != $code) {
						echo '<style class="optimize_css_3" type="text/css" media="'.esc_attr($media).'">';
						echo $code; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- This is already escaped
						echo '</style>' . "\n";
					}
				}
				
				// array type
				if (is_array($inline_styles)) {
					foreach ($inline_styles as $st) {
						$code = WP_Optimize_Minify_Functions::get_css($href, $st, $this->options['enable_css_minification']);
						if (!empty($code) && false != $code) {
							echo '<style class="optimize_css_4" type="text/css" media="'.esc_attr($media).'">';
							echo $code; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- This is already escaped
							echo '</style>' . "\n";
						}
					}
				}
			}
			
			// prevent default
			return false;
		} else {
			if ($this->options['debug']) {
				echo "<!-- wpo_min DEBUG: " . esc_html($handle) . " / " . esc_html($href) . " returned an empty from minification -->" . "\n";
			}
			return $html;
		}
		echo "<!-- ERROR: WPO-Minify couldn't catch the CSS file below. Please report this on https://wordpress.org/support/plugin/wp-optimize/ -->\n";
		return $html;
	}
	
	/**
	 * Enable defer for JavaScript (WP 4.1 and above) and remove query strings for ignored files
	 *
	 * @param String $tag
	 * @param String $handle
	 * @param String $src
	 *
	 * @return String
	 */
	public function defer_js($tag, $handle, $src) {
		$wp_domain = trim(str_ireplace(array('http://', 'https://'), '', trim(site_url(), '/')));
		$exclude_js = $this->get_excluded_js_list();
		$ignore_list = WP_Optimize_Minify_Functions::compile_ignore_list($exclude_js);
		// Should this defer the Poly fills for IE?
		$blacklist = WP_Optimize_Minify_Functions::get_ie_blacklist();
		// no query strings
		if (false !== stripos($src, '?ver')) {
			$srcf = stristr($src, '?ver', true);
			$tag = str_ireplace($src, $srcf, $tag);
			$src = $srcf;
		}

		// return if defer option is set to individual
		if ('individual' === $this->options['enable_defer_js']) {
			return $tag;
		}

		// return the tag if it's a polyfill
		if (count($blacklist) > 0 && WP_Optimize_Minify_Functions::in_arrayi($src, $blacklist)) {
			return $tag;
		}

		// Skip deferring the jQuery library option, if the defer jQuery option is disabled
		if (!$this->options['defer_jquery']
			&& (false !== stripos($tag, '/jquery.js')
			|| false !== stripos($tag, '/jquery.min.js')
			|| (false !== stripos($tag, '/jquery-') && false !== stripos($tag, '.js')))
		) {
			return $tag;
		}

		// return if external script url https://www.chromestatus.com/feature/5718547946799104
		if (WP_Optimize_Minify_Functions::is_local_domain($src) !== true) {
			return $tag;
		}

		// bypass if already optimized
		if (false !== stripos($tag, 'navigator.userAgent.match')) {
			return $tag;
		}

		// should we exclude defer on the login page?
		if ($this->options['exclude_defer_login']
			&& isset($_SERVER['SCRIPT_NAME']) && false !== stripos(sanitize_text_field(wp_unslash($_SERVER["SCRIPT_NAME"])), strrchr(wp_login_url(), '/'))
		) {
			return $tag;
		}

		// add defer attribute, but only if not having async or defer already
		if (stripos($tag, 'defer') === false && stripos($tag, 'async') === false) {

			// add cdn for PageSpeedIndex
			if (!empty($this->options['cdn_url'])) {
				$cdn_url = trim(trim(str_ireplace(array('http://', 'https://'), '', trim($this->options['cdn_url'], '/'))), '/');
				$src = str_ireplace($wp_domain, $cdn_url, $src);
			}
			if ('async_using_js' === $this->options['defer_js_type']) {
				return WP_Optimize_Minify_Print::async_script($src, false);
			}

			// remove wpo_min from the ignore list
			$ignore_list = array_filter($ignore_list, array($this, 'check_wpo'));
			if (count($ignore_list) > 0 && WP_Optimize_Minify_Functions::in_arrayi($src, $ignore_list)) {
				return $tag;
			} else {
				/**
				 * Filters whether to use the defer attribute or async.
				 *
				 * @default string 'defer' (any other value will be set to async)
				 * @param string $value  - 'defer' or 'async'
				 * @param string $tag    - The <script> tag
				 * @param string $handle - The WP handle for the script
				 * @param string $src    - The SRC for the script
				 * @return string - 'defer' or 'async'
				 */
				$defer_or_async = apply_filters('wpo_minify_defer_or_async', 'defer', $tag, $handle, $src);
				if ('defer' === $defer_or_async) {
					return str_ireplace('<script ', '<script defer ', $tag);
				} else {
					return str_ireplace('<script ', '<script async ', $tag);
				}
			}
		}

		// fallback
		return $tag;
	}

	/**
	 * Add inline CSS code / Critical Path
	 *
	 * @return void
	 */
	public function add_critical_path() {
		if (is_front_page() && !empty($this->options['critical_path_css_is_front_page'])) {
			echo '<style id="critical-path-is-front-page" type="text/css" media="all">' . "\n";
			echo $this->options['critical_path_css_is_front_page'] . "\n"; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- This is already escaped
			echo '</style>' . "\n";
		} elseif (!empty($this->options['critical_path_css'])) {
			echo '<style id="critical-path-global" type="text/css" media="all">' . "\n";
			echo $this->options['critical_path_css'] . "\n"; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- This is already escaped
			echo '</style>' . "\n";
		}
	}

	/**
	 * Add critical assets preload
	 *
	 * @return void
	 */
	public function add_assets_preload() {
		$preload = json_decode($this->options['hpreload']);
		if (is_array($preload)) {
			foreach ($preload as $asset) {
				if (!empty($asset)) {
					echo '<link rel="preload" href="'.esc_url($asset->href).'" as="'.esc_attr($asset->type).'"'.($asset->crossorigin ? ' crossorigin' : '').'>';
				}
			}
		}
	}

	/**
	 * Process header CSS
	 *
	 * @return boolean
	 */
	public function process_header_css() {
		global $wp_styles;
		if (!is_object($wp_styles)) return false;

		$cache_path = WP_Optimize_Minify_Cache_Functions::cache_path();
		$cache_base_dir = $cache_path['cachebasedir'];
		$cache_dir = $cache_path['cachedir'];
		$cache_dir_url = $cache_path['cachedirurl'];
		$exclude_css = $this->get_excluded_css_list();
		$ignore_list = WP_Optimize_Minify_Functions::compile_ignore_list($exclude_css);
		$async_css = $this->get_async_css_list();

		$minify_css = $this->options['enable_css_minification'];
		$merge_css = $this->options['enable_merging_of_css'];
		$merge_inline_extra_css_js = $this->options['merge_inline_extra_css_js'];
		$process_css = $minify_css || $merge_css;
		$disable_google_fonts_processing = $this->options['disable_google_fonts_processing'];
		$styles = clone $wp_styles;
		$styles->all_deps($styles->queue);
		$done = $styles->done;
		$header = array();
		$google_fonts = array();
		$process = array();
		$inline_css = array();
		$log = '';

		// dequeue all styles
		if (isset($this->options['remove_css']) && $this->options['remove_css']) {
			foreach ($styles->to_do as $handle) {
				$done = array_merge($done, array($handle));
			}
			// remove from queue
			$wp_styles->done = $done;
			return false;
		}

		// get list of handles to process, dequeue duplicate css urls and keep empty source handles (for dependencies)
		$uniq = array();
		foreach ($styles->to_do as $handle) {
			
			// conditionals
			$conditional = null; if (isset($wp_styles->registered[$handle]->extra["conditional"])) {
				$conditional = $wp_styles->registered[$handle]->extra["conditional"]; // such as ie7, ie8, ie9, etc
			}
			
			// mediatype
			$mt = isset($wp_styles->registered[$handle]->args) ? $wp_styles->registered[$handle]->args : 'all';
			if ('screen' == $mt || 'screen, print' == $mt || empty($mt) || is_null($mt) || false == $mt) {
				$mt = 'all';
			}
			$mediatype = $mt;
			
			// full url or empty
			$href = WP_Optimize_Minify_Functions::get_hurl($wp_styles->registered[$handle]->src);
			$version = $wp_styles->registered[$handle]->ver;
			
			// inlined scripts without file
			if (empty($href)) continue;
			
			
			// mark duplicates as done and remove from the queue
			if (!empty($href)) {
				$version = is_array($version) ? '' : $version;
				$key = hash('adler32', $href . $version);
				if (isset($uniq[$key])) {
					$done = array_merge($done, array($handle));
					continue;
				} else {
					$uniq[$key] = $handle;
				}
			}
			// Exclude specific CSS files from PageSpeedIndex?
			if (WP_Optimize_Minify_Functions::in_arrayi($href, $async_css)) {
				WP_Optimize_Minify_Print::exclude_style($href);
				$done = array_merge($done, array($handle));
				continue;
			}
			// Fonts Awesome Processing
			if (WP_Optimize_Minify_Functions::is_font_awesome($href)) {
				if ('inline' === $this->options['fawesome_method']) {
					WP_Optimize_Minify_Print::inline_style($handle, $href);
					$done = array_merge($done, array($handle));
					continue;
				} elseif ('async' === $this->options['fawesome_method']) {
					WP_Optimize_Minify_Print::async_style($href, $mediatype);
					$done = array_merge($done, array($handle));
					continue;
				} elseif ('exclude' === $this->options['fawesome_method']) {
					WP_Optimize_Minify_Print::exclude_style($href);
					$done = array_merge($done, array($handle));
					continue;
				}
			}

			// Exclude Print mediatype
			if (!empty($this->options['remove_print_mediatypes']) && 'print' === $mediatype) {
				$done = array_merge($done, array($handle));
				continue;
			}

			// array of info to save
			$arr = array(
				'handle' => $handle,
				'url' => $href,
				'conditional' => $conditional,
				'mediatype' => $mediatype
			);

			// google fonts to the top (collect and skip process array)
			if (!$disable_google_fonts_processing && WP_Optimize_Minify_Functions::is_google_font($href)) {
				if ($this->options['remove_googlefonts']) {
					$done = array_merge($done, array($handle));
					continue;
				}
				if (WP_Optimize_Minify_Functions::is_flatsome_handle($handle)) {
					$href = WP_Optimize_Minify_Functions::fix_flatsome_google_fonts_url($href);
					$google_fonts[$handle] = $href;
				} else {
					$google_fonts[$handle] = $href;
				}
			}
			$process[$handle] = $arr;
		}
		
		// Process Google fonts
		if (count($google_fonts) > 0) {
			// merge google fonts if force inlining is enabled?
			$nfonts = array();
			if ($this->options['merge_google_fonts']) {
				$nfonts[] = WP_Optimize_Minify_Fonts::concatenate_google_fonts($google_fonts);
				// mark the google fonts as done so they don't get processed
				if ('inherit' !== $this->options['gfonts_method']) {
					$done = array_merge($done, array_keys($google_fonts));
				}
			} else {
				foreach ($google_fonts as $h => $a) {
					if (!empty($a)) {
						$nfonts[$h] = $a;
					}
				}
			}

			// foreach google font (will be one if merged is not disabled)
			foreach ($nfonts as $handle => $href) {
				if ('inline' === $this->options['gfonts_method']) {
					// download, minify, cache
					$tkey = 'css-'.hash('adler32', $href).'.css';
					// this returns false if the cache is empty! but it doesn't check for failed
					$json = WP_Optimize_Minify_Cache_Functions::get_transient($tkey);
					$json = json_decode($json, true);
					// check if the cache is empty or has no code
					if (null === $json || false === $json || empty($json['code'])) {
						$res = WP_Optimize_Minify_Functions::download_and_minify($href, null, $minify_css, 'css', null);
						if ($this->options['debug']) {
							echo "<!-- wpo_min DEBUG: Uncached file processing now for " . esc_html($href) . " -->\n";
						}
						WP_Optimize_Minify_Cache_Functions::set_transient($tkey, $res);
						// decode
						$json = json_decode($res, true);
					}
					
					// inline css or fail
					if (null !== $json && !empty($json['code'])) {
						// add font-display
						// https://developers.google.com/web/updates/2016/02/font-display
						$json['code'] = str_ireplace('font-style:normal;', 'font-display:block;font-style:normal;', $json['code']);
						echo '<style type="text/css" media="all">';
						echo $json['code']; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- This is already escaped
						echo '</style>' . "\n";
						$done = array_merge($done, array($handle));
					} else {
						echo "<!-- GOOGLE FONTS REQUEST FAILED for " . esc_html($href) . " -->"  . "\n";
						// inlining failed, so enqueue again
						wp_enqueue_style($handle, $href, array(), null);
					}
				} elseif ('async' === $this->options['gfonts_method']) {
					WP_Optimize_Minify_Print::async_style($href);
					$done = array_merge($done, array($handle));
				} elseif ('exclude' === $this->options['gfonts_method']) {
					// make a stylesheet, hide from PageSpeedIndex
					WP_Optimize_Minify_Print::exclude_style($href);
					$done = array_merge($done, array($handle));
				}
			}
		}

		// get groups of handles
		foreach ($styles->to_do as $handle) {
			// skip already processed google fonts and empty dependencies
			if (isset($google_fonts[$handle]) && 'inherit' !== $this->options['gfonts_method']) {
				continue;
			}
			if (empty($wp_styles->registered[$handle]->src)) {
				continue;
			}
			if (WP_Optimize_Minify_Functions::in_arrayi($handle, $done)) {
				continue;
			}
			if (!isset($process[$handle])) {
				continue;
			}

			// get full url
			$href = $process[$handle]['url'];
			$conditional = $process[$handle]['conditional'];
			$mediatype = $process[$handle]['mediatype'];
			
			// IE only files don't increment things
			$ieonly = WP_Optimize_Minify_Functions::is_url_in_ie_blacklist($href);
			if ($ieonly) {
				continue;
			}

			$file_size = WP_Optimize_Minify_Functions::get_file_size($href);

			// If we can't determine file size, then we still need to proceed with normal minify process
			if (!apply_filters('wp_optimize_skip_inlining', false === $file_size || $file_size > 20480 || !$this->options['inline_css'], $file_size, $href)) continue;

			// check if the current URL points to a minified file.
			$exclude_minified_css = WP_Optimize_Minify_Functions::is_minified_css_js_filename($href);
			$normal_processing = $exclude_minified_css && !$merge_css;
			// skip ignore list, conditional css, external css, font-awesome merge and already minified js
			if (($process_css && !$normal_processing && !WP_Optimize_Minify_Functions::in_arrayi($href, $ignore_list) && !isset($conditional) && WP_Optimize_Minify_Functions::internal_url($href, site_url()))
				|| empty($href)
				|| ($process_css && 'inherit' == $this->options['fawesome_method'] && WP_Optimize_Minify_Functions::is_font_awesome($href))
				|| ($process_css && !$disable_google_fonts_processing && 'inherit' == $this->options['gfonts_method'] && WP_Optimize_Minify_Functions::is_google_font($href))
			) {
				// collect inline css for this handle
				if (isset($wp_styles->registered[$handle]->extra['after']) && is_array($wp_styles->registered[$handle]->extra['after'])) {
					$inline_css[$handle] = WP_Optimize_Minify_Functions::minify_css_string(implode('', $wp_styles->registered[$handle]->extra['after'])); // save
					$wp_styles->registered[$handle]->extra['after'] = null; // dequeue
				}
			
				// process
				if (isset($header[count($header)-1]['handle']) || count($header) == 0 || $header[count($header)-1]['media'] != $mediatype || !$merge_css) {
					array_push($header, array('handles' => array(), 'media' => $mediatype, 'versions' => array()));
				}
			
				// push it to the array
				array_push($header[count($header)-1]['handles'], $handle);

				// We need this because some plugins/theme use empty array as version
				// https://plugins.trac.wordpress.org/browser/mailin/tags/3.1.54/sendinblue.php#L456
				$version_str = is_array($wp_styles->registered[$handle]->ver) ? $this->array_to_string_conversion($wp_styles->registered[$handle]->ver) : $wp_styles->registered[$handle]->ver;
				array_push($header[count($header)-1]['versions'], $version_str);

				$header[count($header) - 1]['last_modified'][] = WP_Optimize_Minify_Functions::get_modification_time($wp_styles->registered[$handle]->src);

				// external and ignored css
			} else {
				// normal enqueuing
				array_push($header, array('handle' => $handle));
			}
		}

		/**
		 * Filters the array of stylesheets before processing them
		 *
		 * @param array  $list     - The list of items filtered
		 * @param string $location - The location of the list (footer or header)
		 * @return array
		 */
		$header = apply_filters('wpo_minify_stylesheets', $header, 'header');

		// loop through header css and merge
		for ($i=0,$l=count($header); $i<$l; $i++) {

			if (!isset($header[$i]['handle'])) {

				$handle_str = is_array($header[$i]['handles']) ? $this->array_to_string_conversion($header[$i]['handles']) : strval($header[$i]['handles']);
				$last_modified_str = empty($header[$i]['last_modified']) ? '' : (is_array($header[$i]['last_modified']) ? $this->array_to_string_conversion($header[$i]['last_modified']) : strval($header[$i]['last_modified']));

				if ($merge_css) {
					// get hash for the inline css in this group
					$inline_css_group = array();

					if (is_array($header[$i]['handles'])) {
						foreach ($header[$i]['handles'] as $h) {
							if (!empty($inline_css) && isset($inline_css[$h]) && !empty($inline_css[$h])) {
								$inline_css_group[] = $inline_css[$h];
							}
						}
					}
					$inline_css_hash = md5(implode('', $inline_css_group));
					$hash = hash('adler32', $handle_str . $inline_css_hash . $last_modified_str);
				} else {
					$hash = $handle_str . $last_modified_str;
				}

				// static cache file info
				$file_name = 'wpo-minify-header-'.$hash.($minify_css ? '.min' : '');

				// create cache files and urls
				$file = $cache_dir.'/'.$file_name.'.css';
				$meta_json_file = $cache_base_dir.'/'.'meta.json';
				$file_url = WP_Optimize_Minify_Functions::get_protocol("$cache_dir_url/$file_name.css");
				
				// generate a new cache file
				clearstatcache();
				if (!file_exists($file)) {
					
					// code and log initialization
					$log_header = "PROCESSED on ".gmdate('r')." from ".home_url(add_query_arg(null, null));
					$log = array(
						'header' => $log_header,
						'files' => array()
					);
					$meta_log = $this->meta_log_initialization($log_header);
					$code = '';

					// minify and write to file
					foreach ($header[$i]['handles'] as $handle) {
						if (!empty($wp_styles->registered[$handle]->src)) {
							
							// get href per handle
							$handle_src = $wp_styles->registered[$handle]->src;
							$href = WP_Optimize_Minify_Functions::get_hurl($handle_src);
							$version = $wp_styles->registered[$handle]->ver;
							$last_modified = WP_Optimize_Minify_Functions::get_modification_time($handle_src);
							
							// inlined scripts without file
							if (empty($href)) continue;
							
							// download, minify, cache
							$tkey = 'css-'.hash('adler32', $handle . $href).'.css';
							$json = false;
							$json = WP_Optimize_Minify_Cache_Functions::get_transient($tkey);
							if (false === $json) {
								$enable_minification = $this->options['enable_css_minification'] && !WP_Optimize_Minify_Functions::is_minified_css_js_filename($href);
								$json = WP_Optimize_Minify_Functions::download_and_minify($href, null, $enable_minification, 'css', $handle, $version);
								if ($this->options['debug']) {
									echo "<!-- wpo_min DEBUG: Uncached file processing now for " . esc_html($handle) . " / " . esc_html($href) . " / " . esc_html($version) . " -->" . "\n";
								}
								WP_Optimize_Minify_Cache_Functions::set_transient($tkey, $json);
							}
							
							// decode
							$res = json_decode($json, true);

							if (null === $res) continue;

							if ($this->should_reset_minify_assets($res, $href, 'css', $handle, $version)) {
								WP_Optimize_Minify_Cache_Functions::reset();
								$this->minify_cache_incremented = true;
								$meta_log['invalidation_reason'] = 'Checksum Mismatch and version changed from ' . $res['request']['version'] . ' to ' . $version;
								$meta_log['files_that_changed'][$handle] = $res['log'];
							}

							// response has failed
							if (true != $res['status']) {
								$log['files'][$handle] = $res['log'];
								$log['files'][$handle]['version'] = $version;
								$log['files'][$handle]['last_modified'] = $last_modified;
								continue;
							}

							// Only add the $handle to $done if it was successfully downloaded
							$done[] = $handle;
							// append code to merged file
							$code .= isset($res['code']) ? $res['code'] : '';
							$log['files'][$handle] = $res['log'];
							$log['files'][$handle]['version'] = $version;
							$log['files'][$handle]['last_modified'] = $last_modified;
							
							// append inlined styles
							if ($merge_inline_extra_css_js && isset($inline_css[$handle]) && !empty($inline_css[$handle])) {
								$code.= $inline_css[$handle];
							}

							// consider dependencies on handles with an empty src
						} else {
							wp_dequeue_script($handle);
							wp_enqueue_script($handle);
						}
					};

					// generate cache, write log
					if (!empty($code)) {
						// Only generate meta.json file if cache is reset
						if (!empty($meta_log['invalidation_reason'])) {
							file_put_contents($meta_json_file, wp_json_encode($meta_log));
						}
						WP_Optimize_Minify_Print::write_combined_asset($file, $code, $log);
					}
				} else {
					$log_file = $file.'.json';
					if (file_exists($log_file)) {
						$saved_log = json_decode(file_get_contents($log_file));
						if (is_object($saved_log) && property_exists($saved_log, 'files')) {
							$files = (array) $saved_log->files;
							foreach ($header[$i]['handles'] as $handle) {
								$handle = is_array($handle) ? '' : $handle;
								if (isset($files[$handle]) && $files[$handle]->success) {
									$done[] = $handle;
								}
							}
						} else {
							// The merged file already exists, so add all files to $done.
							$done = array_merge($done, $header[$i]['handles']);
						}
					} else {
						// The merged file already exists, so add all files to $done.
						$done = array_merge($done, $header[$i]['handles']);
					}
				}
			
				// the developers tab, takes precedence
				// Async CSS with loadCSS ?
				if ($this->options['loadcss'] && empty($this->options['remove_css'])) {
					$mt = $header[$i]['media'];
					WP_Optimize_Minify_Print::async_style($file_url, $mt);
					// enqueue file, if not empty
				} else {
					if (file_exists($file) && filesize($file) > 0) {
						// enqueue it
						wp_enqueue_style("wpo_min-header-$i", $file_url, array(), 'mycoolversion', $header[$i]['media']);
						foreach ($header[$i]['handles'] as $h) {
							if (!$merge_inline_extra_css_js && isset($inline_css[$h]) && !empty($inline_css[$h])) {
								wp_add_inline_style("wpo_min-header-$i", $inline_css[$h]);
							}
						}
					} else {
						// file could not be generated, output something meaningful
						echo "<!-- ERROR: WP-Optimize Minify was not allowed to save its cache on - ".esc_html(str_replace(ABSPATH, '', $file))." -->";
						echo "<!-- Please check if the path above is correct and ensure your server has write permission there! -->";
					}
				}
			// other css need to be requeued for the order of files to be kept
			} else {
				wp_dequeue_style($header[$i]['handle']);
				wp_enqueue_style($header[$i]['handle']);
			}
		}

		// remove from queue
		$wp_styles->done = $done;
		return true;
	}
	
	/**
	 * Process JS in the footer
	 *
	 * @return void
	 */
	public function process_footer_scripts() {
		global $wp_scripts;
		if (!is_object($wp_scripts)) {
			return;
		}
		$cache_path = WP_Optimize_Minify_Cache_Functions::cache_path();
		$cache_base_dir = $cache_path['cachebasedir'];
		$cache_dir = $cache_path['cachedir'];
		$cache_dir_url = $cache_path['cachedirurl'];

		
		$exclude_js = $this->get_excluded_js_list();
		$ignore_list = WP_Optimize_Minify_Functions::compile_ignore_list($exclude_js);
		$async_js = $this->get_async_js_list();
		$scripts = clone $wp_scripts;
		$scripts->all_deps($scripts->queue);
		$footer = array();
		$minify_js = $this->options['enable_js_minification'];
		$merge_js = $this->options['enable_merging_of_js'];
		$process_js = $minify_js || $merge_js;
		$merge_inline_extra_css_js = $this->options['merge_inline_extra_css_js'];

		// mark as done (as we go)
		$done = $scripts->done;

		$previous_load_strategy = null;

		// get groups of handles
		foreach ($scripts->to_do as $handle) :

			// get full url
			$href = WP_Optimize_Minify_Functions::get_hurl($wp_scripts->registered[$handle]->src);

			// inlined scripts without file
			if (empty($href)) {
				continue;
			}
			
			// Exclude JS files from PageSpeedIndex (Async) takes priority over the ignore list
			if (false != $async_js || is_array($async_js)) {
				
				// check for string match
				$skipjs = false;
				foreach ($async_js as $l) {
					if (stripos($href, $l) !== false) {
						// print code if there are no linebreaks, or return
						WP_Optimize_Minify_Print::async_script($href);
						$skipjs = true;
						$done = array_merge($done, array($handle));
						break;
					}
				}
				if (false != $skipjs) {
					continue;
				}
			}
			
			// IE only files don't increment things
			$ieonly = WP_Optimize_Minify_Functions::is_url_in_ie_blacklist($href);
			if ($ieonly) {
				continue;
			}

			// check if the current URL points to a minified file.
			$exclude_minified_js = WP_Optimize_Minify_Functions::is_minified_css_js_filename($href);
			$normal_processing = $exclude_minified_js && !$merge_js;

			// skip ignore list, scripts with conditionals, external scripts
			if (($process_js && !$normal_processing && !WP_Optimize_Minify_Functions::in_arrayi($href, $ignore_list) && !isset($wp_scripts->registered[$handle]->extra["conditional"]) && WP_Optimize_Minify_Functions::internal_url($href, site_url()))
				|| empty($href)
			) {
					
				// process
				if (isset($footer[count($footer)-1]['handle'])
					|| !count($footer)
					|| !$merge_js
					|| (isset($scripts->registered[$handle]->extra['strategy']) && $previous_load_strategy != $scripts->registered[$handle]->extra['strategy'])
					|| (!isset($scripts->registered[$handle]->extra['strategy']) && null != $previous_load_strategy)
				) {
					array_push($footer, array('handles' => array(), 'versions' => array()));
				}
				
				if (isset($wp_scripts->registered[$handle]->extra['before'])) {
					if (!empty($footer[count($footer)-1]['handles'])) {
						array_push($footer, array('handles' => array(), 'versions' => array()));
					}
				}

				// push it to the array
				array_push($footer[count($footer)-1]['handles'], $handle);
				array_push($footer[count($footer)-1]['versions'], $wp_scripts->registered[$handle]->ver);

				// Register strategy if it is used
				if (isset($scripts->registered[$handle]->extra['strategy'])) $footer[count($footer)-1]['strategy'] = $scripts->registered[$handle]->extra['strategy'];

				$footer[count($footer) - 1]['last_modified'][] = WP_Optimize_Minify_Functions::get_modification_time($wp_scripts->registered[$handle]->src);
				// external and ignored scripts

				if (isset($scripts->registered[$handle]->extra['strategy'])) {
					$previous_load_strategy = $scripts->registered[$handle]->extra['strategy'];
				} else {
					$previous_load_strategy = null;
				}
					
			} else {
				array_push($footer, array('handle' => $handle));
			}
		endforeach;

		// loop through footer scripts and merge
		for ($i=0,$l=count($footer); $i<$l; $i++) {

			if (!isset($footer[$i]['handle'])) {

				$handles_str = is_array($footer[$i]['handles']) ? $this->array_to_string_conversion($footer[$i]['handles']) : strval($footer[$i]['handles']);
				$last_modified_str = empty($footer[$i]['last_modified']) ? '' : (is_array($footer[$i]['last_modified']) ? $this->array_to_string_conversion($footer[$i]['last_modified']) : strval($footer[$i]['last_modified']));

				if ($merge_js) {
					// Change the hash based on last modified timestamp
					$hash = hash('adler32', $handles_str . $last_modified_str);
				} else {
					$hash = $handles_str . $last_modified_str;
				}
								
				// static cache file info
				$file_name = 'wpo-minify-footer-'.$hash.($minify_js ? '.min' : '');
				
				// create cache files and urls
				$file = $cache_dir.'/'.$file_name.'.js';
				$meta_json_file = $cache_base_dir.'/'.'meta.json';
				$file_url = WP_Optimize_Minify_Functions::get_protocol($cache_dir_url.'/'.$file_name.'.js');
			
				// generate a new cache file
				clearstatcache();
				if (!file_exists($file)) {
					
					// code and log initialization
					$log_header = "PROCESSED on ".gmdate('r')." from ".home_url(add_query_arg(null, null));
					$log = array(
						'header' => $log_header,
						'files' => array()
					);
					$meta_log = $this->meta_log_initialization($log_header);
					$before_code = '';
					$code = '';
					$after_code = '';
				
					// minify and write to file
					foreach ($footer[$i]['handles'] as $handle) :
						if (!empty($wp_scripts->registered[$handle]->src)) {
							// only add minified scripts once to the bundle
							if (in_array($handle, $done)) continue;
							
							// get href per handle
							$handle_src = $wp_scripts->registered[$handle]->src;
							$href = WP_Optimize_Minify_Functions::get_hurl($handle_src);
							$version = $wp_scripts->registered[$handle]->ver;
							$last_modified = WP_Optimize_Minify_Functions::get_modification_time($handle_src);
							// inlined scripts without file
							if (empty($href)) {
								continue;
							}
							// download, minify, cache
							$tkey = 'js-'.hash('adler32', $handle . $href).'.js';
							$json = false;
							$json = WP_Optimize_Minify_Cache_Functions::get_transient($tkey);
							if (false === $json) {
								$enable_minification = $minify_js && !WP_Optimize_Minify_Functions::is_minified_css_js_filename($href);
								$json = WP_Optimize_Minify_Functions::download_and_minify($href, null, $enable_minification, 'js', $handle, $version);
								if ($this->options['debug']) {
									echo "<!-- wpo_min DEBUG: Uncached file processing now for " . esc_html($handle) . " / " . esc_html($href) . " / " . esc_html($version) . " -->\n";
								}
								WP_Optimize_Minify_Cache_Functions::set_transient($tkey, $json);
							}
							
							// decode
							$res = json_decode($json, true);

							if (null === $res) continue;

							if ($this->should_reset_minify_assets($res, $href, 'js', $handle, $version)) {
								WP_Optimize_Minify_Cache_Functions::reset();
								$this->minify_cache_incremented = true;
								$meta_log['invalidation_reason'] = 'Checksum Mismatch and version changed from ' . $res['request']['version'] . ' to ' . $version;
								$meta_log['files_that_changed'][$handle] = $res['log'];
							}
							
							// response has failed
							if (true != $res['status']) {
								$log['files'][$handle] = $res['log'];
								$log['files'][$handle]['uses_loading_strategy'] = isset($footer[$i]['strategy']);
								$log['files'][$handle]['version'] = $version;
								$log['files'][$handle]['last_modified'] = $last_modified;
								continue;
							}

							$done[] = $handle;
							// Add extra data from wp_add_inline_script before
							if (!empty($wp_scripts->registered[$handle]->extra)) {
								if (!empty($wp_scripts->registered[$handle]->extra['before']) && is_array($wp_scripts->registered[$handle]->extra['before'])) {
									if ($merge_inline_extra_css_js) {
										$before_code .= "\n" . implode("\n", array_filter($wp_scripts->registered[$handle]->extra['before']));
									}
								}
							}

							// Add translation
							if (!empty($wp_scripts->registered[$handle]->textdomain)) {
								$code .= "\n" . $wp_scripts->print_translations($handle, false);
							}
							
							// Add extra data from wp_add_inline_script after
							if (!empty($wp_scripts->registered[$handle]->extra)) {
								if (!empty($wp_scripts->registered[$handle]->extra['after']) && is_array($wp_scripts->registered[$handle]->extra['after'])) {
									if ($merge_inline_extra_css_js) {
										$after_code .= "\n" . implode("\n", array_filter($wp_scripts->registered[$handle]->extra['after']));
									}
								}
							}
							
							// append code to merged file
							$code .= $before_code . "\n";
							$code .= isset($res['code']) ? $res['code'] : '';
							$code .= "\n" . $after_code . "\n";
							$code = WP_Optimize_Minify_Functions::prepare_merged_js($code, $href);
							$log['files'][$handle] = $res['log'];
							$log['files'][$handle]['uses_loading_strategy'] = isset($footer[$i]['strategy']);
							$log['files'][$handle]['version'] = $version;
							$log['files'][$handle]['last_modified'] = $last_modified;
							
							// consider dependencies on handles with an empty src
						} else {
							wp_dequeue_script($handle);
							wp_enqueue_script($handle);
						}
					endforeach;

					// generate cache, write log
					if (!empty($code)) {
						// Only generate meta.json file if cache is reset
						if (!empty($meta_log['invalidation_reason'])) {
							file_put_contents($meta_json_file, wp_json_encode($meta_log));
						}
						WP_Optimize_Minify_Print::write_combined_asset($file, $code, $log);
					}
				} else {
					$log_file = $file.'.json';
					if (file_exists($log_file)) {
						$saved_log = json_decode(file_get_contents($log_file));
						if (is_object($saved_log) && property_exists($saved_log, 'files')) {
							$files = (array) $saved_log->files;
							foreach ($footer[$i]['handles'] as $handle) {
								if (isset($files[$handle]) && $files[$handle]->success) {
									$done[] = $handle;
								}
							}
						} else {
							// The merged file already exists, so add all files to $done.
							$done = array_merge($done, $footer[$i]['handles']);
						}
					} else {
						// The merged file already exists, so add all files to $done.
						$done = array_merge($done, $footer[$i]['handles']);
					}
				}
				
				// register minified file
				wp_register_script("wpo_min-footer-$i", $file_url, array(), null, false);
				
				// add all extra data from wp_localize_script
				$before_code = '';
				$data = array();
				$after_code = '';

				foreach ($footer[$i]['handles'] as $handle) {
					if (isset($wp_scripts->registered[$handle]->extra['data'])) {
						$data[] = $wp_scripts->registered[$handle]->extra['data'];
					}
					// Add extra data from wp_add_inline_script before
					if (!empty($wp_scripts->registered[$handle]->extra)) {
						if (!empty($wp_scripts->registered[$handle]->extra['before']) && is_array($wp_scripts->registered[$handle]->extra['before'])) {
							if (!$merge_inline_extra_css_js) {
								$before_code.= "\n" . implode("\n", array_filter($wp_scripts->registered[$handle]->extra['before'])) . "\n";
							}
						}
						if (!empty($wp_scripts->registered[$handle]->extra['after']) && is_array($wp_scripts->registered[$handle]->extra['after'])) {
							if (!$merge_inline_extra_css_js) {
								$after_code.= "\n" . implode("\n", array_filter($wp_scripts->registered[$handle]->extra['after'])) . "\n";
							}
						}
					}
				}
				if (count($data) > 0) {
					$wp_scripts->registered["wpo_min-footer-$i"]->extra['data'] = implode("\n", $data);
				}
				
				// enqueue file, if not empty
				if (file_exists($file) && (filesize($file) > 0 || count($data) > 0)) {
					if (!empty($before_code)) {
						wp_add_inline_script("wpo_min-footer-$i", $before_code, 'before');
					}
					wp_enqueue_script("wpo_min-footer-$i");
					if (!empty($after_code)) {
						wp_add_inline_script("wpo_min-footer-$i", $after_code, 'after');
					}

					if (isset($footer[$i]['strategy'])) {
						// Backward compatible way of doing this
						wp_script_add_data( "wpo_min-footer-$i", 'strategy', $footer[$i]['strategy']);
					}
				} else {
					// file could not be generated, output something meaningful
					echo "<!-- ERROR: WP-Optimize Minify was not allowed to save its cache on - ".esc_html(str_replace(ABSPATH, '', $file))." -->";
					echo "<!-- Please check if the path above is correct and ensure your server has write permission there! -->";
				}
				
				// other scripts need to be requeued for the order of files to be kept
			} else {
				wp_dequeue_script($footer[$i]['handle']);
				wp_enqueue_script($footer[$i]['handle']);
			}
		}

		// remove from queue
		$wp_scripts->done = $done;
	}

	/**
	 * Process header JavaScript
	 * Dependant on 'enable_js' option
	 *
	 * @return void
	 */
	public function process_header_scripts() {
		global $wp_scripts;
		if (!is_object($wp_scripts)) return;
		$cache_path = WP_Optimize_Minify_Cache_Functions::cache_path();
		$cache_base_dir = $cache_path['cachebasedir'];
		$cache_dir = $cache_path['cachedir'];
		$cache_dir_url = $cache_path['cachedirurl'];
		$exclude_js = $this->get_excluded_js_list();
		$ignore_list = WP_Optimize_Minify_Functions::compile_ignore_list($exclude_js);
		$async_js = $this->get_async_js_list();
		$scripts = clone $wp_scripts;
		$scripts->all_deps($scripts->queue);
		$minify_js = $this->options['enable_js_minification'];
		$merge_js = $this->options['enable_merging_of_js'];
		$process_js = $minify_js || $merge_js;
		$merge_inline_extra_css_js = $this->options['merge_inline_extra_css_js'];
		$header = array();
		// mark as done (as we go)
		$done = $scripts->done;
		$excluded_dependencies = array();

		$previous_load_strategy = null;

		// Prepare and separate assets (get groups of handles)
		foreach ($scripts->to_do as $handle) {
			// get full url
			$href = WP_Optimize_Minify_Functions::get_hurl($wp_scripts->registered[$handle]->src);
			// inlined scripts without file
			if (empty($href)) {
				wp_enqueue_script($handle, false);
				continue;
			}

			// Only go through items without a group
			if (!$scripts->groups[$handle]) {
				// Exclude JS files from PageSpeedIndex (Async) takes priority over the ignore list
				// check for string match
				$skipjs = false;
				foreach ($async_js as $l) {
					if (stripos($href, $l) !== false) {
						WP_Optimize_Minify_Print::async_script($href);
						$skipjs = true;
						$done = array_merge($done, array($handle));
						break;
					}
				}
				// IE only files don't increment things
				if ($skipjs
					|| WP_Optimize_Minify_Functions::is_url_in_ie_blacklist($href)
				) {
					continue;
				}

				// Skip jQuery from the merged files if deferring is ENABLED and defer_jquery is DISABLED
				if ('all' === $this->options['enable_defer_js']
					&& !$this->options['defer_jquery']
					&& (false !== stripos($href, '/jquery.js')
					|| false !== stripos($href, '/jquery.min.js')
					|| (false !== stripos($href, '/jquery-') && false !== stripos($href, '.js')))
				) {
					continue;
				}

				// check if the current URL points to a minified file.
				$exclude_minified_js = WP_Optimize_Minify_Functions::is_minified_css_js_filename($href);
				$normal_processing = $exclude_minified_js && !$merge_js;

				// Group handles - skip ignore list, scripts with conditionals, external scripts
				if (($process_js && !$normal_processing && !WP_Optimize_Minify_Functions::in_arrayi($href, $ignore_list) && !isset($wp_scripts->registered[$handle]->extra["conditional"]) && WP_Optimize_Minify_Functions::internal_url($href, site_url()))
					|| empty($href)
				) {
					// process
					if (isset($header[count($header)-1]['handle'])
						|| !count($header)
						|| !$merge_js
						|| (isset($scripts->registered[$handle]->extra['strategy']) && $previous_load_strategy != $scripts->registered[$handle]->extra['strategy'])
						|| (!isset($scripts->registered[$handle]->extra['strategy']) && null != $previous_load_strategy)
					) {
						array_push($header, array('handles' => array(), 'versions' => array()));
					}

					// Force loading of dependencies
					foreach ($wp_scripts->registered[$handle]->deps as $dep) {
						// If the handle is not present in $done yet, or excluded, enqueue it.
						$dep_href = WP_Optimize_Minify_Functions::get_hurl($wp_scripts->registered[$dep]->src);
						if (!in_array($dep, $done) && !WP_Optimize_Minify_Functions::in_arrayi($dep_href, $ignore_list)) {
							// Include any dependency
							array_push($header[count($header)-1]['handles'], $dep);
							array_push($header[count($header)-1]['versions'], $wp_scripts->registered[$dep]->ver);
						} elseif (!in_array($dep, $done) && WP_Optimize_Minify_Functions::in_arrayi($dep_href, $ignore_list)) {
							// The dependency is in the exclude list
							array_push($header, array('handle' => $dep));
							// Record dependency to be added to the minified script as dependency array
							if (isset($excluded_dependencies[count($header)])) {
								$excluded_dependencies[count($header)][] = $dep;
							} else {
								$excluded_dependencies[count($header)] = array($dep);
							}
							// Adds the 'handles' record for the main script
							array_push($header, array('handles' => array(), 'versions' => array()));
						}
					}

					if (isset($wp_scripts->registered[$handle]->extra['before'])) {
						if (!empty($header[count($header)-1]['handles'])) {
							array_push($header, array('handles' => array(), 'versions' => array()));
						}
					}

					// push it to the array
					array_push($header[count($header)-1]['handles'], $handle);
					array_push($header[count($header)-1]['versions'], $scripts->registered[$handle]->ver);
					$header[count($header) - 1]['last_modified'][] = WP_Optimize_Minify_Functions::get_modification_time($wp_scripts->registered[$handle]->src);

					// Register strategy if it is used
					if (isset($scripts->registered[$handle]->extra['strategy'])) $header[count($header)-1]['strategy'] = $scripts->registered[$handle]->extra['strategy'];

					if (isset($scripts->registered[$handle]->extra['strategy'])) {
						$previous_load_strategy = $scripts->registered[$handle]->extra['strategy'];
					} else {
						$previous_load_strategy = null;
					}
					

					// external and ignored scripts
				} else {
					// add the ignored assets
					array_push($header, array('handle' => $handle));
				}

				// make sure that the scripts skipped here, show up in the footer
			} else {
				wp_enqueue_script($handle, $href, array(), null, true);
			}
		}

		// loop through header scripts and merge
		for ($i=0,$l=count($header); $i < $l; $i++) {

			if (!isset($header[$i]['handle'])) {

				$handles_str = is_array($header[$i]['handles']) ? $this->array_to_string_conversion($header[$i]['handles']) : strval($header[$i]['handles']);
				$last_modified_str = empty($header[$i]['last_modified']) ? '' : (is_array($header[$i]['last_modified']) ? $this->array_to_string_conversion($header[$i]['last_modified']) : strval($header[$i]['last_modified']));

				if ($merge_js) {
					$hash = hash('adler32', $handles_str . $last_modified_str);
				} else {
					$hash = $handles_str . $last_modified_str;
				}

				// static cache file info
				$file_name = 'wpo-minify-header-'.$hash.($minify_js ? '.min' : '');
				// create cache files and urls
				$file = $cache_dir.'/'.$file_name.'.js';
				$meta_json_file = $cache_base_dir.'/'.'meta.json';
				$file_url = WP_Optimize_Minify_Functions::get_protocol($cache_dir_url.'/'.$file_name.'.js');
				
				// generate a new cache file
				clearstatcache();
				if (!file_exists($file)) {
					
					// code and log initialization
					$log_header = "PROCESSED on ".gmdate('r')." from ".home_url(add_query_arg(null, null));
					$log = array(
						'header' => $log_header,
						'files' => array()
					);
					$meta_log = $this->meta_log_initialization($log_header);
					$before_code = '';
					$code = '';
					$after_code = '';

					// minify and write to file
					foreach ($header[$i]['handles'] as $handle) {
						if (!empty($wp_scripts->registered[$handle]->src)) {
							// only add minified scripts once to the bundle
							if (in_array($handle, $done)) continue;

							// get href per handle
							$handle_src = $wp_scripts->registered[$handle]->src;
							$href = WP_Optimize_Minify_Functions::get_hurl($handle_src);
							$version = $wp_scripts->registered[$handle]->ver;
							$last_modified = WP_Optimize_Minify_Functions::get_modification_time($handle_src);
							if (empty($href)) continue;
							// download, minify, cache
							$tkey = 'js-'.hash('adler32', $handle . $href).'.js';
							$json = false;
							$json = WP_Optimize_Minify_Cache_Functions::get_transient($tkey);
							if (false === $json) {
								$enable_minification = $minify_js && !WP_Optimize_Minify_Functions::is_minified_css_js_filename($href);
								$json = WP_Optimize_Minify_Functions::download_and_minify($href, null, $enable_minification, 'js', $handle, $version);
								if ($this->options['debug']) {
									echo "<!-- wpo_min DEBUG: Uncached file processing now for " . esc_html($handle) . " / " . esc_html($href) . " / " . esc_html($version) . " -->" . "\n";
								}
								WP_Optimize_Minify_Cache_Functions::set_transient($tkey, $json);
							}
							
							// decode
							$res = json_decode($json, true);

							if (null === $res) continue;
							
							if ($this->should_reset_minify_assets($res, $href, 'js', $handle, $version)) {
								WP_Optimize_Minify_Cache_Functions::reset();
								$this->minify_cache_incremented = true;
								$meta_log['invalidation_reason'] = 'Checksum Mismatch and version changed from ' . $res['request']['version'] . ' to ' . $version;
								$meta_log['files_that_changed'][$handle] = $res['log'];
							}

							// response has failed
							if (true != $res['status']) {
								$log['files'][$handle] = $res['log'];
								$log['files'][$handle]['uses_loading_strategy'] = isset($header[$i]['strategy']);
								$log['files'][$handle]['version'] = $version;
								$log['files'][$handle]['last_modified'] = $last_modified;
								continue;
							}

							// Add extra data from wp_add_inline_script before
							if (!empty($wp_scripts->registered[$handle]->extra)) {
								if (!empty($wp_scripts->registered[$handle]->extra['before']) && is_array($wp_scripts->registered[$handle]->extra['before'])) {
									if ($merge_inline_extra_css_js) {
										$before_code .= "\n" . implode("\n", array_filter($wp_scripts->registered[$handle]->extra['before']));
									}
								}
							}

							// Only add the $handle to $done if it was successfully downloaded
							$done[] = $handle;

							// Add translations
							if (!empty($wp_scripts->registered[$handle]->textdomain)) {
								$code .= "\n" . $wp_scripts->print_translations($handle, false);
							}

							// Add extra data from wp_add_inline_script after
							if (!empty($wp_scripts->registered[$handle]->extra)) {
								if (!empty($wp_scripts->registered[$handle]->extra['after']) && is_array($wp_scripts->registered[$handle]->extra['after'])) {
									if ($merge_inline_extra_css_js) {
										$after_code.= "\n" . implode("\n", array_filter($wp_scripts->registered[$handle]->extra['after']));
									}
								}
							}
							
							// append code to merged file
							$code .= $before_code . "\n";
							$code .= isset($res['code']) ? $res['code'] : '';
							$code .= "\n" . $after_code . "\n";
							$code = WP_Optimize_Minify_Functions::prepare_merged_js($code, $href);
							$log['files'][$handle] = $res['log'];
							$log['files'][$handle]['uses_loading_strategy'] = isset($header[$i]['strategy']);
							$log['files'][$handle]['version'] = $version;
							$log['files'][$handle]['last_modified'] = $last_modified;
							
							// consider dependencies on handles with an empty src
						} else {
							wp_dequeue_script($handle);
							wp_enqueue_script($handle);
						}
					}

					// generate cache, write log
					if (!empty($code)) {
						// Only generate meta.json file if cache is reset
						if (!empty($meta_log['invalidation_reason'])) {
							file_put_contents($meta_json_file, wp_json_encode($meta_log));
						}
						WP_Optimize_Minify_Print::write_combined_asset($file, $code, $log);
					}
				} else {
					$log_file = $file.'.json';
					if (file_exists($log_file)) {
						$saved_log = json_decode(file_get_contents($log_file));
						if (is_object($saved_log) && property_exists($saved_log, 'files')) {
							$files = (array) $saved_log->files;
							foreach ($header[$i]['handles'] as $handle) {
								$handle = is_array($handle) ? '' : $handle;
								if (isset($files[$handle]) && $files[$handle]->success) {
									$done[] = $handle;
								}
							}
						} else {
							// The merged file already exists, so add all files to $done.
							$done = array_merge($done, $header[$i]['handles']);
						}
					} else {
						// The merged file already exists, so add all files to $done.
						$done = array_merge($done, $header[$i]['handles']);
					}
				}

				// register minified file
				$dependencies = isset($excluded_dependencies[$i]) ? $excluded_dependencies[$i] : array();
				wp_register_script("wpo_min-header-$i", $file_url, $dependencies, null, false);

				// add all extra data from wp_localize_script
				$before_code = '';
				$data = array();
				$after_code = '';

				foreach ($header[$i]['handles'] as $handle) {
					if (isset($wp_scripts->registered[$handle]->extra['data'])) {
						$data[] = $wp_scripts->registered[$handle]->extra['data'];
					}

					// Add extra data from wp_add_inline_script before
					if (!empty($wp_scripts->registered[$handle]->extra)) {
						if (!empty($wp_scripts->registered[$handle]->extra['before']) && is_array($wp_scripts->registered[$handle]->extra['before'])) {
							if (!$merge_inline_extra_css_js) {
								$before_code.= "\n" . implode("\n", array_filter($wp_scripts->registered[$handle]->extra['before'])) . "\n";
							}
						}
						if (!empty($wp_scripts->registered[$handle]->extra['after']) && is_array($wp_scripts->registered[$handle]->extra['after'])) {
							if (!$merge_inline_extra_css_js) {
								$after_code.= "\n" . implode("\n", array_filter($wp_scripts->registered[$handle]->extra['after'])) . "\n";
							}
						}
					}
				}
				if (count($data) > 0) {
					$wp_scripts->registered["wpo_min-header-$i"]->extra['data'] = implode("\n", $data);
				}
				
				// enqueue file, if not empty
				if (file_exists($file) && (filesize($file) > 0 || count($data) > 0)) {
					if (!empty($before_code)) {
						wp_add_inline_script("wpo_min-header-$i", $before_code, 'before');
					}
					wp_enqueue_script("wpo_min-header-$i");
					if (!empty($after_code)) {
						wp_add_inline_script("wpo_min-header-$i", $after_code, 'after');
					}

					if (isset($header[$i]['strategy'])) {
						// Backward compatible way of doing this
						wp_script_add_data( "wpo_min-header-$i", 'strategy', $header[$i]['strategy']);
					}
				} else {
					// file could not be generated, output something meaningful
					echo "<!-- ERROR: WP-Optimize minify was not allowed to save its cache on - ".esc_html(str_replace(ABSPATH, '', $file))." -->";
					echo "<!-- Please check if the path above is correct and ensure your server has write permission there! -->";
					echo "<!-- If you found a bug, please report this on https://wordpress.org/support/plugin/wp-optimize/ -->";
				}
			
				// other scripts need to be requeued for the order of files to be kept
			} else {
				wp_dequeue_script($header[$i]['handle']);
				wp_enqueue_script($header[$i]['handle']);
			}
		}

		// remove from queue
		$wp_scripts->done = $done;
	}
	
	/**
	 * Process CSS in the footer
	 *
	 * @return void
	 */
	public function process_footer_css() {
		global $wp_styles;
		if (!is_object($wp_styles)) return;
		$cache_path = WP_Optimize_Minify_Cache_Functions::cache_path();
		$cache_base_dir = $cache_path['cachebasedir'];
		$cache_dir = $cache_path['cachedir'];
		$cache_dir_url = $cache_path['cachedirurl'];
		$exclude_css = $this->get_excluded_css_list();
		$ignore_list = WP_Optimize_Minify_Functions::compile_ignore_list($exclude_css);
		$async_css = $this->get_async_css_list();
		$minify_css = $this->options['enable_css_minification'];
		$merge_css = $this->options['enable_merging_of_css'];
		$process_css = $minify_css || $merge_css;
		$disable_google_fonts_processing = $this->options['disable_google_fonts_processing'];
		$log = "";
		$code = "";
		$styles = clone $wp_styles;
		$styles->all_deps($styles->queue);
		$done = $styles->done;
		$footer = array();
		$google_fonts = array();
		$inline_css = array();

		// dequeue all styles
		if (isset($this->options['remove_css']) && $this->options['remove_css']) {
			foreach ($styles->to_do as $handle) :
				$done = array_merge($done, array($handle));
			endforeach;
			
			// remove from queue
			$wp_styles->done = $done;
			return;
		}

		// dequeue and get a list of google fonts, or requeue external
		foreach ($styles->to_do as $handle) {
			$href = WP_Optimize_Minify_Functions::get_hurl($wp_styles->registered[$handle]->src);
			// inlined scripts without file
			if (empty($href)) continue;
			
			if (!$disable_google_fonts_processing && WP_Optimize_Minify_Functions::is_google_font($href)) {
				wp_dequeue_style($handle);
				if ($this->options['remove_googlefonts']) {
					$done = array_merge($done, array($handle));
					continue;
				}
				// mark as done if to be removed
				if ($this->options['merge_google_fonts']
					|| 'inline' === $this->options['gfonts_method']
				) {
					if (WP_Optimize_Minify_Functions::is_flatsome_handle($handle)) {
						$href = WP_Optimize_Minify_Functions::fix_flatsome_google_fonts_url($href);
						$google_fonts[$handle] = $href;
					} else {
						$google_fonts[$handle] = $href;
					}
				} else {
					// skip google fonts optimization?
					wp_enqueue_style($handle);
				}
			} else {
				// failsafe
				wp_dequeue_style($handle);
				wp_enqueue_style($handle);
			}
			
		}

		// concat google fonts, if enabled
		if ($this->options['merge_google_fonts']
			&& count($google_fonts) > 0
			|| ('inline' === $this->options['gfonts_method'] && count($google_fonts) > 0)
		) {
		
			// merge google fonts if force inlining is enabled?
			$nfonts = array();
			if ($this->options['merge_google_fonts']) {
				$nfonts[] = WP_Optimize_Minify_Fonts::concatenate_google_fonts($google_fonts);
			} else {
				foreach ($google_fonts as $h => $a) {
					if (!empty($a)) {
						$nfonts[$h] = $a;
					}
				}
			}

			// foreach google font (will be one if merged is not disabled)
			if (count($nfonts) > 0) {
				foreach ($nfonts as $handle => $href) {
					// hide from PageSpeedIndex, async, inline, or default
					if ('exclude' === $this->options['gfonts_method']) {
						WP_Optimize_Minify_Print::exclude_style($href);
						$done = array_merge($done, array($handle));
					} elseif ('async' === $this->options['gfonts_method']) {
						// async CSS
						WP_Optimize_Minify_Print::async_style($href);
						$done = array_merge($done, array($handle));
					} elseif ('inline' === $this->options['gfonts_method']) {
						// inline css
						WP_Optimize_Minify_Print::inline_style($handle, $href);
						$done = array_merge($done, array($handle));
					} else {
						// fallback, enqueue google fonts
						wp_enqueue_style($handle, $href, array(), null, 'all');
					}
				}
			}
		}


		// get groups of handles
		$uniq = array();
		foreach ($styles->to_do as $handle) {

			// skip already processed google fonts
			if (isset($google_fonts[$handle])) {
				continue;
			}
			
			// conditionals
			$conditional = null; if (isset($wp_styles->registered[$handle]->extra["conditional"])) {
				$conditional = $wp_styles->registered[$handle]->extra["conditional"]; // such as ie7, ie8, ie9, etc
			}
			
			// mediatype
			$mt = isset($wp_styles->registered[$handle]->args) ? $wp_styles->registered[$handle]->args : 'all';
			if ('screen' == $mt || 'screen, print' == $mt || empty($mt) || is_null($mt) || false == $mt) {
				$mt = 'all';
			}
			$mediatype = $mt;
			
			// get full url
			$href = WP_Optimize_Minify_Functions::get_hurl($wp_styles->registered[$handle]->src);
			$version = $wp_styles->registered[$handle]->ver;
			
			// inlined scripts without file
			if (empty($href)) {
				continue;
			}
			
			// mark duplicates as done and remove from the queue
			if (!empty($href)) {
				$version = is_array($version) ? '' : $version;
				$key = hash('adler32', $href . $version);
				if (isset($uniq[$key])) {
					$done = array_merge($done, array($handle));
					continue;
				} else {
					$uniq[$key] = $handle;
				}
			}
			
			// IE only files don't increment things
			$ieonly = WP_Optimize_Minify_Functions::is_url_in_ie_blacklist($href);
			if ($ieonly) {
				continue;
			}

			// Exclude specific CSS files from PageSpeedIndex?
			if (false != $async_css && is_array($async_css) && WP_Optimize_Minify_Functions::in_arrayi($href, $async_css)) {
				WP_Optimize_Minify_Print::exclude_style($href);
				$done = array_merge($done, array($handle));
				continue;
			}

			if (WP_Optimize_Minify_Functions::is_font_awesome($href)) {
				if ('inline' === $this->options['fawesome_method']) {
					WP_Optimize_Minify_Print::inline_style($handle, $href);
					$done = array_merge($done, array($handle));
					continue;
				} elseif ('async' === $this->options['fawesome_method']) {
					WP_Optimize_Minify_Print::async_style($href, $mediatype);
					$done = array_merge($done, array($handle));
					continue;
				} elseif ('exclude' === $this->options['fawesome_method']) {
					WP_Optimize_Minify_Print::exclude_style($href);
					$done = array_merge($done, array($handle));
					continue;
				}
			}

			// Exclude Print mediatype
			if ($this->options['remove_print_mediatypes'] && 'print' === $mediatype) {
				$done = array_merge($done, array($handle));
				continue;
			}
			
			// check if the current URL points to a minified file.
			$exclude_minified_css = WP_Optimize_Minify_Functions::is_minified_css_js_filename($href);
			$normal_processing = $exclude_minified_css && !$merge_css;
			// skip ignore list, conditional css, external css, font-awesome merge and already minified css
			if (($process_css && !$normal_processing && !WP_Optimize_Minify_Functions::in_arrayi($href, $ignore_list) && !isset($conditional) && WP_Optimize_Minify_Functions::internal_url($href, site_url()))
				|| empty($href)
			) {
					
				// collect inline css for this handle
				if (isset($wp_styles->registered[$handle]->extra['after']) && is_array($wp_styles->registered[$handle]->extra['after'])) {
					$inline_css[$handle] = WP_Optimize_Minify_Functions::minify_css_string(implode('', $wp_styles->registered[$handle]->extra['after'])); // save
					$wp_styles->registered[$handle]->extra['after'] = null; // dequeue
				}

				// process
				if (isset($footer[count($footer)-1]['handle']) || !count($footer) || $footer[count($footer)-1]['media'] != $wp_styles->registered[$handle]->args || !$merge_css) {
					array_push($footer, array('handles' => array(), 'media' => $mediatype, 'versions' => array()));
				}
			
				// push it to the array get latest modified time
				array_push($footer[count($footer)-1]['handles'], $handle);
				array_push($footer[count($footer)-1]['versions'], $version);
				$footer[count($footer) - 1]['last_modified'][] = WP_Optimize_Minify_Functions::get_modification_time($wp_styles->registered[$handle]->src);
				
				// external and ignored css
			} else {
				
				// normal enqueueing
				array_push($footer, array('handle' => $handle));
			}
		}

		/**
		 * Filters the array of stylesheets before processing them
		 *
		 * @param array  $list     - The list of items filtered
		 * @param string $location - The location of the list (footer or header)
		 * @return array
		 */
		$footer = apply_filters('wpo_minify_stylesheets', $footer, 'footer');

		// loop through footer css and merge
		for ($i=0,$l=count($footer); $i<$l; $i++) {

			if (!isset($footer[$i]['handle'])) {

				$handles_str = is_array($footer[$i]['handles']) ? $this->array_to_string_conversion($footer[$i]['handles']) : strval($footer[$i]['handles']);
				$last_modified_str = empty($footer[$i]['last_modified']) ? '' : (is_array($footer[$i]['last_modified']) ? $this->array_to_string_conversion($footer[$i]['last_modified']) : strval($footer[$i]['last_modified']));

				if ($merge_css) {
					// get hash for the inline css in this group
					$inline_css_group = array();
					if (is_array($footer[$i]['handles'])) {
						foreach ($footer[$i]['handles'] as $h) {
							if (isset($inline_css[$h]) && !empty($inline_css[$h])) {
								$inline_css_group[] = $inline_css[$h];
							}
						}
					}
					$inline_css_hash = md5(implode('', $inline_css_group));
					$hash = hash('adler32', $handles_str . $inline_css_hash . $last_modified_str);
				} else {
					$hash = $handles_str . $last_modified_str;
				}

				// static cache file info
				$file_name = 'wpo-minify-footer-'.$hash.($minify_css ? '.min' : '');

				// create cache files and urls
				$file = $cache_dir.'/'.$file_name.'.css';
				$meta_json_file = $cache_base_dir.'/'.'meta.json';
				$file_url = WP_Optimize_Minify_Functions::get_protocol($cache_dir_url.'/'.$file_name.'.css');
				
				// generate a new cache file
				clearstatcache();
				if (!file_exists($file)) {

					// code and log initialization
					$log_header = "PROCESSED on ".gmdate('r')." from ".home_url(add_query_arg(null, null));
					$log = array(
						'header' => $log_header,
						'files' => array()
					);
					$meta_log = $this->meta_log_initialization($log_header);
					$code = '';

					// minify and write to file
					foreach ($footer[$i]['handles'] as $handle) {
						if (!empty($wp_styles->registered[$handle]->src)) {

							// get href per handle
							$handle_src = $wp_styles->registered[$handle]->src;
							$href = WP_Optimize_Minify_Functions::get_hurl($handle_src);
							$version = $wp_styles->registered[$handle]->ver;
							$last_modified = WP_Optimize_Minify_Functions::get_modification_time($handle_src);
							// inlined scripts without hreffile
							if (empty($href)) continue;

							// download, minify, cache
							$tkey = 'css-'.hash('adler32', $handle . $href).'.css';
							$json = false;
							$json = WP_Optimize_Minify_Cache_Functions::get_transient($tkey);
							if (false === $json) {
								$enable_minification = $minify_css && !WP_Optimize_Minify_Functions::is_minified_css_js_filename($href);
								$json = WP_Optimize_Minify_Functions::download_and_minify($href, null, $enable_minification, 'css', $handle, $version);
								if ($this->options['debug']) {
									echo "<!-- wpo_min DEBUG: Uncached file processing now for " . esc_html($handle) . " / " . esc_html($href) . " / " . esc_html($version) . " -->" . "\n";
								}
								WP_Optimize_Minify_Cache_Functions::set_transient($tkey, $json);
							}
							
							// decode
							$res = json_decode($json, true);

							if (null === $res) continue;

							if ($this->should_reset_minify_assets($res, $href, 'css', $handle, $version)) {
								WP_Optimize_Minify_Cache_Functions::reset();
								$this->minify_cache_incremented = true;
								$meta_log['invalidation_reason'] = 'Checksum Mismatch and version changed from ' . $res['request']['version'] . ' to ' . $version;
								$meta_log['files_that_changed'][$handle] = $res['log'];
							}
							
							// response has failed
							if (true != $res['status']) {
								$log['files'][$handle] = $res['log'];
								$log['files'][$handle]['version'] = $version;
								$log['files'][$handle]['last_modified'] = $last_modified;
								continue;
							}

							$done[] = $handle;

							// append code to merged file
							$code .= isset($res['code']) ? $res['code'] : '';
							$log['files'][$handle] = $res['log'];
							$log['files'][$handle]['version'] = $version;
							$log['files'][$handle]['last_modified'] = $last_modified;

							// append inlined styles
							if (isset($inline_css[$handle]) && !empty($inline_css[$handle])) {
								$code.= $inline_css[$handle];
							}

							// consider dependencies on handles with an empty src
						} else {
							wp_dequeue_script($handle);
							wp_enqueue_script($handle);
						}
					};

					// generate cache, add inline css, write log
					if (!empty($code)) {
						// Only generate meta.json file if cache is reset
						if (!empty($meta_log['invalidation_reason'])) {
							file_put_contents($meta_json_file, wp_json_encode($meta_log));
						}
						WP_Optimize_Minify_Print::write_combined_asset($file, $code, $log);
					}
				} else {
					$log_file = $file.'.json';
					if (file_exists($log_file)) {
						$saved_log = json_decode(file_get_contents($log_file));
						if (is_object($saved_log) && property_exists($saved_log, 'files')) {
							$files = (array) $saved_log->files;
							foreach ($footer[$i]['handles'] as $handle) {
								if (isset($files[$handle]) && $files[$handle]->success) {
									$done[] = $handle;
								}
							}
						} else {
							// The merged file already exists, so add all files to $done.
							$done = array_merge($done, $footer[$i]['handles']);
						}
					} else {
						// The merged file already exists, so add all files to $done.
						$done = array_merge($done, $footer[$i]['handles']);
					}
				}

				// Async CSS with loadCSS ?
				if ($this->options['loadcss'] && !$this->options['remove_css']) {
					$mt = $footer[$i]['media'];
					WP_Optimize_Minify_Print::async_style($file_url, $mt);
					// enqueue file, if not empty
				} else {
					if (file_exists($file) && filesize($file) > 0) {

						// inline if the file is smaller than 20KB or option has been enabled
						if (filesize($file) < 20000 && $this->options['inline_css']) {
							$this->inline_css(file_get_contents($file), $handle, $file_url, $footer[$i]['media']);
						} else {
							// enqueue it
							wp_enqueue_style("wpo_min-footer-$i", $file_url, array(), null, $footer[$i]['media']);
						}
					} else {
						// file could not be generated, output something meaningful
						echo "<!-- ERROR: WP-Optimize Minify was not allowed to save its cache on - ".esc_html(str_replace(ABSPATH, '', $file))." -->";
						echo "<!-- Please check if the path above is correct and ensure your server has write permission there! -->";
					}
				}

				// other css need to be requeued for the order of files to be kept
			} else {
				wp_dequeue_style($footer[$i]['handle']);
				wp_enqueue_style($footer[$i]['handle']);
			}
		}

		// remove from queue
		$wp_styles->done = $done;
	}

	/**
	 * Process JS Scripts of type module
	 *
	 * @param String $buffer Page HTML.
	 *
	 * @return String
	 */
	public function process_script_modules($buffer) {

		if ('' === $buffer) return '';

		if (!WP_Optimize_Utils::is_valid_html($buffer)) return $buffer;

		$minify_js = $this->options['enable_js_minification'];
		$cache_path = WP_Optimize_Minify_Cache_Functions::cache_path();
		$cache_dir = $cache_path['cachedir'];
		$cache_dir_url = $cache_path['cachedirurl'];
		$cache_base_dir = $cache_path['cachebasedir'];

		$scripts = $this->get_scripts($buffer);
		if (empty($scripts)) return $buffer;

		foreach ($scripts as $script) {
			if ("module" !== $script['type']) continue;

			$href = WP_Optimize_Minify_Functions::get_hurl($script['url']);
			if (WP_Optimize_Minify_Functions::is_minified_css_js_filename($href)) continue;

			$last_modified = WP_Optimize_Minify_Functions::get_modification_time($script['url']);
			$handle = $script['handle'];
			$version = $script['version'];

			// Module script handles use slashes and @ symbols,
			// replace them with '-' and empty string, break if handle is still ''
			if (!empty($handle)) {
				$handle_no_slash = str_replace(array('/', '@'), array('-', ''), $handle);
			} else {
				continue;
			}

			// code and log initialization
			$log_header = "PROCESSED on ".gmdate('r')." from ".home_url(add_query_arg(null, null));
			$log = array(
				'header' => $log_header,
				'files' => array()
			);
			$meta_log = $this->meta_log_initialization($log_header);
			$code = '';

			// create cache files and urls
			$file_name = 'wpo-minify-'.$handle_no_slash.($minify_js ? '.min' : '');
			$file = $cache_dir.'/'.$file_name.'.js';
			$meta_json_file = $cache_base_dir.'/'.'meta.json';
			$file_url = WP_Optimize_Minify_Functions::get_protocol($cache_dir_url.'/'.$file_name.'.js');

			// download, minify, cache
			$tkey = 'js-'.hash('adler32', $handle_no_slash . $href).'.js';
			$json = WP_Optimize_Minify_Cache_Functions::get_transient($tkey);
			if (false === $json) {
				$enable_minification = $minify_js && !WP_Optimize_Minify_Functions::is_minified_css_js_filename($href);
				$json = WP_Optimize_Minify_Functions::download_and_minify($href, null, $enable_minification, 'js', $handle_no_slash, $version);
				if ($this->options['debug']) {
					echo "<!-- wpo_min DEBUG: Uncached file processing now for " . esc_html($handle) . " / " . esc_html($href) . " / " . esc_html($version) . " -->\n";
				}
				WP_Optimize_Minify_Cache_Functions::set_transient($tkey, $json);
			}

			// decode
			$res = json_decode($json, true);

			if (null === $res) continue;

			// Reset minified script module
			if ($this->should_reset_minify_assets($res, $href, 'js', $handle, $version)) {
				WP_Optimize_Minify_Cache_Functions::reset();
				$this->minify_cache_incremented = true;
				$meta_log['invalidation_reason'] = 'Checksum Mismatch and version changed from ' . $res['request']['version'] . ' to ' . $version;
				$meta_log['files_that_changed'][$handle] = $res['log'];
			}

			if (!$res['status']) continue;

			$code .= isset($res['code']) ? $res['code'] : '';
			$code = WP_Optimize_Minify_Functions::prepare_merged_js($code, $href);
			$log['files'][$handle] = $res['log'];
			$log['files'][$handle]['version'] = $version;
			$log['files'][$handle]['last_modified'] = $last_modified;

			// If code is empty (nothing to minify) break loop
			if (empty($code)) continue;

			// Only generate meta.json file if cache is reset
			if (!empty($meta_log['invalidation_reason'])) {
				file_put_contents($meta_json_file, wp_json_encode($meta_log));
			}
			WP_Optimize_Minify_Print::write_combined_asset($file, $code, $log);

			// Extract importmap script tag
			$json_map = $this->get_script_module_importmap($buffer);
			$json_map_update = $json_map;

			// Update module source file and importmap with new file url (if necessary)
			$buffer = str_replace($script['url'], $file_url, $buffer);
			if (!empty($json_map) && isset($json_map['imports'][$handle])) {
				$json_map_update['imports'][$handle] = $file_url;
				$buffer = str_replace(wp_json_encode($json_map), wp_json_encode($json_map_update), $buffer);
			}
		}

		return $buffer;
	}

	/**
	 * Orders the CSS per media type
	 *
	 * @param array $list - The list of assets
	 * @return array
	 */
	public function order_stylesheets_per_media_type($list) {
		// get unique mediatypes
		$allmedia = array();
		foreach ($list as $array) {
			if (isset($array['media'])) {
				$allmedia[$array['media']] = '';
			}
		}

		// extract handles by mediatype
		$grouphandles = array();
		foreach ($allmedia as $md => $var) {
			foreach ($list as $array) {
				if (isset($array['media']) && $array['media'] === $md) {
					foreach ($array['handles'] as $h) {
						$grouphandles[$md][] = $h;
					}
				}
			}
		}

		// reset and reorder list by mediatypes
		$newlist = array();
		foreach ($allmedia as $md => $var) {
			$newlist[] = array('handles' => $grouphandles[$md], 'media' => $md);
		}
		if (count($newlist) > 0) {
			$list = $newlist;
		}

		return $list;
	}

	/**
	 * Merged google font
	 *
	 * @return void;
	 */
	public function add_google_fonts_merged() {
		// must have something to do
		if (count($this->collect_google_fonts) == 0) return;

		// merge google fonts
		$href = WP_Optimize_Minify_Fonts::concatenate_google_fonts($this->collect_google_fonts);
		if (empty($href)) {
			return;
		}
		
		// hide google fonts from PageSpeedIndex
		if ('exclude' === $this->options['gfonts_method']) {
			// make a stylesheet, hide from PageSpeedIndex
			WP_Optimize_Minify_Print::exclude_style($href);
		} elseif ('async' === $this->options['gfonts_method']) {
			// load google fonts async
			WP_Optimize_Minify_Print::async_style($href);
		} else {
			// fallback to normal inline
			WP_Optimize_Minify_Print::style($href);
		}

		// unset per hook
		foreach ($this->collect_google_fonts as $k => $v) {
			unset($this->collect_google_fonts[$k]);
		}
	}

	/**
	 *  Check if the string given contains 'wpo-minify'
	 *
	 * @param string $var
	 *
	 * @return boolean
	 */
	public function check_wpo($var) {
		return (false === strpos($var, 'assets/wpo-minify'));
	}

	/**
	 * Generate preload headers file
	 *
	 * @return boolean
	 */
	public function generate_preload_headers() {

		// always false for admin pages
		if (is_admin()) return false;

		// get host with multisite support and query strings
		$host = isset($_SERVER['SERVER_NAME']) ? sanitize_text_field(wp_unslash($_SERVER['SERVER_NAME'])) : '';
		if (empty($host)) {
			$host = isset($_SERVER['HTTP_HOST']) ? sanitize_text_field(wp_unslash($_SERVER['HTTP_HOST'])) : '';
		}

		$request_query = '';
		$request_uri = isset($_SERVER['REQUEST_URI']) ? esc_url_raw(wp_unslash($_SERVER['REQUEST_URI'])) : '';
		if (!empty($request_uri)) {
			$request_query = wp_parse_url($request_uri, PHP_URL_QUERY);
			$request_uri = wp_parse_url($request_uri, PHP_URL_PATH);
		}
		
		// initialize headers
		$headers = array();

		// css headers
		if ($this->options['enabled_css_preload']
			&& count($this->collect_preload_css) > 0
		) {
			foreach ($this->collect_preload_css as $u) {
				// filter out footer footer files, because they are not in the critical path
				if (strpos($u, '/assets/wpo-minify-footer-') !== false) {
					continue;
				}
				
				// add headers
				$headers[] = "Link: <$u>; rel=preload; as=style";
			}
		}
		
		// js headers
		if ($this->options['enabled_js_preload']
			&& count($this->collect_preload_js) > 0
		) {
			foreach ($this->collect_preload_js as $u) {

				// filter out footer footer files, because they are not in the critical path
				if (false !== strpos($u, '/assets/wpo-minify-footer-')) {
					continue;
				}
				
				// add headers
				$headers[] = "Link: <$u>; rel=preload; as=script";
			}
		}
		
		// must have something
		if (count($headers) == 0) {
			return false;
		} else {
			$headers = implode("\n", $headers);
		}
		
		// get cache path
		$cache_path = WP_Optimize_Minify_Cache_Functions::cache_path();
		$header_dir = $cache_path['headerdir'];
		
		// possible cache file locations
		$b = $header_dir . '/' . md5($host.'-'.$request_uri) . '.header';
		$a = $header_dir . '/' . md5($host.'-'.$request_uri . $request_query).'.header';

		// reset file cache
		clearstatcache();
		
		// if there are no query strings
		if ($b == $a) {
			if (!file_exists($a)) {
				WP_Optimize_Minify_Print::write_header($a, $headers);
			}
			return false;
		} elseif (!file_exists($b)) {
			WP_Optimize_Minify_Print::write_header($b, $headers);
		}
		
		return false;
	}

	/**
	 * Collect all wpo_min JS files and save them to a headers file
	 *
	 * @param String $html
	 * @param String $handle
	 * @param String $src
	 *
	 * @return String
	 */
	public function collect_js_preload_headers($html, $handle, $src) {
		if (false !== strpos($src, 'assets/wpo-minify')) {
			if (!in_array($src, $this->collect_preload_js)) {
				$this->collect_preload_js[] = $src;
			}
		}
		return $html . "\n";
	}

	/**
	 * Collect all wpo_min CSS files and save them to a headers file
	 * this function intercepts the styles that are enqueued
	 * take note that if the css is loaded ASYNC, it's not enqueued
	 *
	 * @param string $html   - Html string
	 * @param string $handle - Handle
	 * @param string $src    - The CSS file path
	 *
	 * @return string
	 */
	public function collect_css_preload_headers($html, $handle, $src) {
		if (false !== strpos($src, 'assets/wpo-minify')) {
			if (!in_array($src, $this->collect_preload_css)) {
				$this->collect_preload_css[] = $src;
			}
		}
		return $html . "\n";
	}

	/**
	 * Get current headers file for the url
	 *
	 * @return bool|string
	 */
	private function get_preload_headers() {

		// always false for admin pages
		if (is_admin()) return false;

		$enabled_css_preload = $this->options['enabled_css_preload'];
		$enabled_js_preload = $this->options['enabled_js_preload'];

		if (!$enabled_css_preload && !$enabled_js_preload) {
			return false;
		}

		// get host with multisite support and query strings
		$host = isset($_SERVER['SERVER_NAME']) ? sanitize_text_field(wp_unslash($_SERVER['SERVER_NAME'])) : '';
		if (empty($host)) {
			$host = isset($_SERVER['HTTP_HOST']) ? sanitize_text_field(wp_unslash($_SERVER['HTTP_HOST'])) : '';
		}
		$request_query = '';
		$request_uri = isset($_SERVER['REQUEST_URI']) ? esc_url_raw(wp_unslash($_SERVER['REQUEST_URI'])) : '';
		if (!empty($request_uri)) {
			$request_query = wp_parse_url($request_uri, PHP_URL_QUERY);
			$request_uri = wp_parse_url($request_uri, PHP_URL_PATH);
		}
		
		// get cache path
		$cache_path = WP_Optimize_Minify_Cache_Functions::cache_path();
		$header_dir = $cache_path['headerdir'];
		$cache_file_base = $header_dir . '/';
		
		// possible cache file locations
		$b = $cache_file_base . md5("$host-$request_uri").'.header';
		$a = $cache_file_base . md5("$host-$request_uri$request_query").'.header';
		
		// reset file cache
		clearstatcache();
		
		// return header files or fallback
		if ($b == $a && file_exists($a)) {
			return file_get_contents($a);
		}
		if ($b != $a && file_exists($b)) {
			return file_get_contents($b);
		}
		
		return false;
	}
	
	/**
	 * Add pre-connect and pre-load headers
	 *
	 * @return void
	 */
	public function extra_preload_headers() {
		if (!$this->run_on_page('extra_preload_headers')) return;

		// fetch headers
		$pre_connect = $this->get_pre_connect_list();

		// preload
		if (is_array($pre_connect) && count($pre_connect) > 0) {
			foreach ($pre_connect as $url) {
				if (!empty($url) && filter_var($url, FILTER_VALIDATE_URL)) {
					header("Link: <$url>; rel=preconnect", false);
				}
			}
		}

		$headers = $this->get_preload_headers();
		if (false != $headers) {
			$nh = array_map('trim', explode("\n", $headers));
			foreach ($nh as $h) {
				if (!empty($h)) {
					header($h, false);
				}
			}
		}
	}

	/**
	 * Add caching headers
	 *
	 * @param array $headers An array of headers
	 *
	 * @return array An array of modified headers
	 */
	public function add_caching_headers($headers) {
		$cache = WP_Optimize()->get_page_cache();
		if ($cache->is_enabled()) return $headers;

		if (!isset($headers['Cache-Control'])) {
			$headers['Cache-Control'] = 'must-revalidate';
		}

		if (!isset($headers['Last-Modified'])) {
			$headers['Last-Modified'] =  gmdate('D, d M Y H:i:s', time()) . ' GMT';
		}

		return $headers;
	}

	/**
	 * Includes dependency files
	 */
	private function include_dependencies() {
		if (!class_exists('WP_Optimize_Minify_Functions')) {
			include WP_OPTIMIZE_MINIFY_DIR.'/class-wp-optimize-minify-functions.php';
		}
		
		if (!class_exists('WP_Optimize_Minify_Print')) {
			include WP_OPTIMIZE_MINIFY_DIR.'/class-wp-optimize-minify-print.php';
		}
		
		if (!class_exists('WP_Optimize_Minify_Fonts')) {
			include WP_OPTIMIZE_MINIFY_DIR.'/class-wp-optimize-minify-fonts.php';
		}
	}

	/**
	 * Handles emoji removal
	 */
	private function disable_emojis() {
		WP_Optimize_Minify_Functions::disable_wp_emojicons();
		add_filter('tiny_mce_plugins', array('WP_Optimize_Minify_Functions', 'disable_emojis_tinymce' ));
	}

	/**
	 * Handles header meta information removal
	 */
	private function remove_header_meta_info() {
		// no resource hints, generator tag, shortlinks, manifest link, etc
		remove_action('wp_head', 'wp_resource_hints', 2);
		remove_action('wp_head', 'wp_generator');
		remove_action('template_redirect', 'wp_shortlink_header', 11);
		remove_action('wp_head', 'wlwmanifest_link');
		remove_action('wp_head', 'rsd_link');
		remove_action('wp_head', 'adjacent_posts_rel_link_wp_head', 10, 0);
		remove_action('wp_head', 'feed_links', 2);
		remove_action('wp_head', 'feed_links_extra', 3);
		WP_Optimize_Minify_Functions::remove_redundant_shortlink();
	}

	/**
	 * Handles javascript processing
	 */
	private function process_js() {
		add_action('wp_print_scripts', array($this, 'process_header_scripts'), PHP_INT_MAX);
		add_action('wp_print_footer_scripts', array($this, 'process_footer_scripts'), 9);
		
		// Defer JS
		add_filter('script_loader_tag', array($this, 'defer_js'), 10, 3);

		// Preloading
		if ($this->options['enabled_js_preload']) {
			add_filter('script_loader_tag', array($this, 'collect_js_preload_headers'), PHP_INT_MAX, 3);
		}

		// add the LoadAsync JavaScript function
		$async_js = $this->get_async_js_list();
		if (count($async_js) > 0
			|| ( 'all' === $this->options['enable_defer_js'] && 'async_using_js' === $this->options['defer_js_type'] )
		) {
			add_action('wp_head', array('WP_Optimize_Minify_Print', 'add_load_async'), 0);
		}

		// Process script module from generated html
		ob_start(array($this, "process_script_modules"));
	}

	/**
	 * Extract scripts tags from html buffer using regex
	 *
	 * @param string $html - HTML document as string
	 * @return array
	 */
	private function get_scripts($html) {

		preg_match_all('/<script([^>]*)>/Umi', $html, $script_matches, PREG_SET_ORDER);

		$modified_script_matches = array();
		foreach ($script_matches as $script) {
			$script['url'] = '';
			$script['handle'] = '';
			$script['version'] = '';
			$script['type'] = '';
			$attributes = WP_Optimize_Utils::parse_attributes($script[1]);

			if (isset($attributes['src'])) {
				$script['url'] = $attributes['src'];
				$url_query = wp_parse_url($script['url'], PHP_URL_QUERY);
				$output = array();
				wp_parse_str($url_query, $output);
				if (isset($output['ver'])) $script['version'] = $output['ver'];
			}

			// Extract the id/handle from attribute's array if present
			if (isset($attributes['id'])) $script['handle'] = $attributes['id'];

			// Extract the type from attribute's array if present
			if (isset($attributes['type'])) $script['type'] = $attributes['type'];

			$modified_script_matches[] = $script;
		}

		return $modified_script_matches;
	}

	/**
	 * Extract `importmap` json object from html buffer using regex
	 *
	 * @param string $html - HTML document as string
	 * @return array
	 */
	private function get_script_module_importmap($html) {
		preg_match('/<script\s+type\s*=\s*[\'"]importmap.*>(?<importmap>.*)<\/script>/Umsi', $html, $match);
		if (!empty($match) && isset($match['importmap'])) return json_decode($match['importmap'], true);

		return array();
	}

	/**
	 * Handles css processing
	 */
	private function process_css() {
		add_action('wp_head', array($this, 'add_critical_path'), 2);

		// merge, if inline is selected but prevent optimization for these locations
		if ($this->options['inline_css']) {
			// this prints the styles (not fonts) and checks the 'colllect google fonts'
			add_filter('style_loader_tag', array($this, 'inline_css'), PHP_INT_MAX, 4);
			// this prints the google fonts
			add_action('wp_print_styles', array($this, 'add_google_fonts_merged'), PHP_INT_MAX);
			add_action('wp_print_footer_scripts', array($this, 'add_google_fonts_merged'), PHP_INT_MAX);
		}
		// Preloading
		if ($this->options['enabled_css_preload']) {
			add_filter('style_loader_tag', array($this, 'collect_css_preload_headers'), PHP_INT_MAX, 3);
		}
		// Optimize the css and collect the google fonts for merging
		add_action('wp_print_styles', array($this, 'process_header_css'), PHP_INT_MAX);
		add_action('wp_print_footer_scripts', array($this, 'process_footer_css'), 9);

		/**
		 * Filters whether or not to ignore the order of the CSS files, and group them by media type
		 *
		 * @param boolean $maintain_css_order
		 * @return boolean
		 * @default true
		 */
		if (!apply_filters('wpo_minify_maintain_css_order', true)) {
			// Reorder stylesheets
			add_filter('wpo_minify_stylesheets', array($this, 'order_stylesheets_per_media_type'), 10);
		}
	}

	/**
	 * Determines whether we should minify html or not
	 */
	private function should_process_html() {
		return $this->options['html_minification'] && !is_admin() && $this->is_cache_preload();
	}

	/**
	 * Determines whether to use loadCSS polyfill or not
	 */
	private function should_use_loadCSS() {
		return $this->options['loadcss']
			|| 'async' === $this->options['fawesome_method']
			|| 'async' === $this->options['gfonts_method'];
	}

	/**
	 * Removes query string from static assets
	 */
	private function remove_query_string_from_static_assets() {
		add_filter('style_loader_src', array('WP_Optimize_Minify_Functions', 'remove_cssjs_ver'), 10, 2);
		add_filter('script_loader_src', array('WP_Optimize_Minify_Functions', 'remove_cssjs_ver'), 10, 2);
	}

	/**
	 * Converts the lines in a textarea option value into an array
	 *
	 * @param string $option
	 * @return array
	 */
	private function convert_option_to_array($option) {
		return trim($option) ? array_map('trim', explode("\n", trim($option))) : array();
	}

	/**
	 * Retrieves excluded css URLs as an array
	 *
	 * @return array
	 */
	private function get_excluded_css_list() {
		$excluded_css = $this->options['exclude_css'];
		return $this->convert_option_to_array($excluded_css);
	}

	/**
	 * Retrieves async css URLs as an array
	 *
	 * @return array
	 */
	private function get_async_css_list() {
		$async_css = $this->options['async_css'];
		return $this->convert_option_to_array($async_css);
	}

	/**
	 * Retrieves excluded javascript URLs as an array
	 *
	 * @return array
	 */
	private function get_excluded_js_list() {
		$excluded_js = $this->options['exclude_js'];
		return $this->convert_option_to_array($excluded_js);
	}

	/**
	 * Retrieves async javascript URLs as an array
	 *
	 * @return array
	 */
	private function get_async_js_list() {
		$async_js = $this->options['async_js'];
		return $this->convert_option_to_array($async_js);
	}

	/**
	 * Retrieves pre connect headers as an array
	 *
	 * @return array
	 */
	private function get_pre_connect_list() {
		$pre_connect = $this->options['hpreconnect'];
		return $this->convert_option_to_array($pre_connect);
	}

	/**
	 * Array to string conversion
	 *
	 * @param array $arr
	 * @return string
	 */
	private function array_to_string_conversion($arr) {
		$str = '';
		// implode won't work, because element can be an array
		foreach ($arr as $value) {
			$str .= is_array($value) ? '' : $value;
		}
		return $str;
	}

	/**
	 * Decides whether minify cache should be incremented or not
	 *
	 * @param string $res
	 * @param string $href
	 * @param string $type
	 * @param string $handle
	 * @param string $version
	 *
	 * @return bool true when cache is invalid, false otherwise
	 */
	private function should_reset_minify_assets($res, $href, $type, $handle, $version) {
		if (isset($res['request']['version']) && $res['request']['version'] != $version && !$this->minify_cache_incremented) {
			$enable_minification = $this->options['enable_'.$type.'_minification'] && !WP_Optimize_Minify_Functions::is_minified_css_js_filename($href);
			$new_json = WP_Optimize_Minify_Functions::download_and_minify($href, null, $enable_minification, $type, $handle, $version);
			$new_res = json_decode($new_json, true);

			/**
			 * In case `download_and_minify` fails because of
			 * Network issues, Syntax errors in updated code,
			 * Wrong use of `wpo_minify_get_js` and `wpo_minify_get_css` filters
			 * We don't want to invalidate current assets, so bail out
			 */
			if (null === $new_res) return false;

			$hash = hash('sha256', $res['code']);
			$new_hash = hash('sha256', $new_res['code']);
			return strcmp($hash, $new_hash);
		}
	}
}
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if (!defined('ABSPATH')) die('No direct access allowed');

if (!defined('WP_OPTIMIZE_MINIFY_DIR')) {
	die('No direct access.');
}

if (!function_exists('wpo_delete_files')) {
	include WPO_PLUGIN_MAIN_PATH.'cache/file-based-page-cache-functions.php';
}

class WP_Optimize_Minify_Cache_Functions {

	/**
	 * Fix the permission bits on generated files
	 *
	 * @param String $file - full path to a file
	 */
	public static function fix_permission_bits($file) {
		if (function_exists('stat')) {
			if ($stat = stat(dirname($file))) {
				$perms = $stat['mode'] & 0007777;
				chmod($file, $perms); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_chmod -- N/A
				clearstatcache();
				return true;
			}
		}
				
		// Get permissions from parent directory
		$perms = 0777;
		if (function_exists('stat')) {
			if ($stat = stat(dirname($file))) {
				$perms = $stat['mode'] & 0007777;
			}
		}
				
		if (file_exists($file)) {
			if (($perms & ~umask() != $perms)) {
				$folder_parts = explode('/', substr($file, strlen(dirname($file)) + 1));
				for ($i = 1, $c = count($folder_parts); $i <= $c; $i++) {
					chmod(dirname($file) . '/' . implode('/', array_slice($folder_parts, 0, $i)), $perms); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_chmod -- N/A
				}
			}
		}
		return true;
	}

	/**
	 * Get cache directories and urls
	 *
	 * @return Array
	 */
	public static function cache_path() {
		// get latest time stamp
		$cache_time = wp_optimize_minify_config()->get('last-cache-update');

		$cache_base_dir = WPO_CACHE_MIN_FILES_DIR . "/$cache_time";
		$cache_dir_url = WPO_CACHE_MIN_FILES_URL . "/$cache_time/assets";
		$tmp_dir      = WPO_CACHE_MIN_FILES_DIR . "/tmp";
		$header_dir   = WPO_CACHE_MIN_FILES_DIR . "/$cache_time/header";
		$cache_dir    = WPO_CACHE_MIN_FILES_DIR . "/$cache_time/assets";

		// Create directories
		$dirs = array($cache_dir, $tmp_dir, $header_dir);
		foreach ($dirs as $target) {
			$enabled = wp_optimize_minify_config()->get('enabled');
			if (false === $enabled) break;

			if (!is_dir($target) && !wp_mkdir_p($target)) {
				error_log('WP_Optimize_Minify_Cache_Functions::cache_path(): The folder "'.$target.'" could not be created.'); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_error_log -- Used for debugging
			}
		}
		return array(
			'tmpdir' => $tmp_dir,
			'cachedir' => $cache_dir,
			'cachedirurl' => $cache_dir_url,
			'headerdir' => $header_dir,
			'cachebasedir' => $cache_base_dir
		);
	}

	/**
	 * Increment file names
	 */
	public static function cache_increment() {
		$stamp = time();
		wp_optimize_minify_config()->update(array(
			'last-cache-update' => $stamp
		));
		return $stamp;
	}

	/**
	 * Reset the cache (Increment + purge temp files)
	 */
	public static function reset() {
		self::cache_increment();
		self::purge_temp_files();
	}

	/**
	 * Will delete temporary intermediate stuff but leave final css/js alone for compatibility
	 *
	 * @return array
	 */
	public static function purge_temp_files() {
		// get cache directories and urls
		$cache_path = self::cache_path();
		$tmp_dir = $cache_path['tmpdir'];
		$header_dir = $cache_path['headerdir'];

		// delete temporary directories only
		if (is_dir($tmp_dir)) {
			wpo_delete_files($tmp_dir, true);
		}
		if (is_dir($header_dir)) {
			wpo_delete_files($header_dir, true);
		}
		
		/**
		 * Action triggered after purging temporary files
		 */
		do_action('wpo_min_after_purge_temp_files');
		return array(
			'tmpdir' => $tmp_dir,
			'headerdir' => $header_dir,
		);
	}

	/**
	 * Purge supported hosting and plugins
	 *
	 * @return array An array of caches purged message
	 */
	public static function purge_others() {
		/**
		 * Action triggered before purging other plugins cache
		 */
		do_action('wpo_min_before_purge_others');

		// WordPress default cache
		if (function_exists('wp_cache_flush')) {
			wp_cache_flush();
		}

		// Purge WP-Optimize
		$is_cache_purged = WP_Optimize()->get_page_cache()->purge();
		if ($is_cache_purged) WP_Optimize()->get_page_cache()->file_log("Full Cache Purge triggered by: ". __METHOD__);
		
		// Store the messages of purged cache if it was successful
		$result = array();

		// When plugins have a simple method, add them to the array ('Plugin Name' => 'method_name')
		$others = array(
			'WP Super Cache' => 'wp_cache_clear_cache',
			'W3 Total Cache' => 'w3tc_pgcache_flush',
			'WP Fastest Cache' => 'wpfc_clear_all_cache',
			'WP Rocket' => 'rocket_clean_domain',
			'Cachify' => 'cachify_flush_cache',
			'Comet Cache' => array('comet_cache', 'clear'),
			'SG Optimizer' => 'sg_cachepress_purge_cache',
			'Pantheon' => 'pantheon_wp_clear_edge_all',
			'Zen Cache' => array('zencache', 'clear'),
			'Breeze' => array('Breeze_PurgeCache', 'breeze_cache_flush'),
			'Swift Performance' => array('Swift_Performance_Cache', 'clear_all_cache'),
		);

		foreach ($others as $plugin => $method) {
			if (is_callable($method)) {
				call_user_func($method);

				$result[] = self::get_caches_purged_message($plugin);
			}
		}

		// Purge LiteSpeed Cache
		if (is_callable(array('LiteSpeed_Cache_Tags', 'add_purge_tag'))) {
			LiteSpeed_Cache_Tags::add_purge_tag('*');

			$result[] = self::get_caches_purged_message('LiteSpeed Cache');
		}

		// Purge Hyper Cache
		if (class_exists('HyperCache')) {
			do_action('autoptimize_action_cachepurged');

			$result[] = self::get_caches_purged_message('Hyper Cache');
		}

		// Purge Godaddy Managed WordPress Hosting (Varnish + APC)
		if (class_exists('WPaaS\Plugin')) {
			self::godaddy_request('BAN');
			// translators: %s is a remote cache system name `Go Daddy Varnish`
			$result[] = sprintf(__('A cache purge request has been sent to %s.', 'wp-optimize'), '<strong>Go Daddy Varnish</strong>') . ' ' . __('Please note that it may not work every time, due to cache rate limiting by your host.', 'wp-optimize');
		}

		// purge cache enabler
		if (has_action('ce_clear_cache')) {
			do_action('ce_clear_cache');

			$result[] = self::get_caches_purged_message('Cache Enabler');
		}

		// Purge WP Engine
		if (class_exists("WpeCommon")) {
			if (method_exists('WpeCommon', 'purge_memcached')) {
				WpeCommon::purge_memcached();
			}
			if (method_exists('WpeCommon', 'clear_maxcdn_cache')) {
				WpeCommon::clear_maxcdn_cache();
			}
			if (method_exists('WpeCommon', 'purge_varnish_cache')) {
				WpeCommon::purge_varnish_cache();
			}

			if (method_exists('WpeCommon', 'purge_memcached') || method_exists('WpeCommon', 'clear_maxcdn_cache') || method_exists('WpeCommon', 'purge_varnish_cache')) {
				// translators: %s is a remote cache system name `WP Engine`
				$result[] = sprintf(__('A cache purge request has been sent to %s.', 'wp-optimize'), '<strong>WP Engine</strong>') . ' ' . __('Please note that it may not work every time, due to cache rate limiting by your host.', 'wp-optimize');
			}
		}

		// Purge Kinsta
		global $kinsta_cache;
		if (isset($kinsta_cache) && class_exists('\\Kinsta\\CDN_Enabler')) {
			if (!empty($kinsta_cache->kinsta_cache_purge) && is_callable(array($kinsta_cache->kinsta_cache_purge, 'purge_complete_caches'))) {
				$kinsta_cache->kinsta_cache_purge->purge_complete_caches();

				$result[] = self::get_remote_caches_purged_message('Kinsta');
			}
		}

		// Purge Pagely
		if (class_exists('PagelyCachePurge')) {
			$purge_pagely = new PagelyCachePurge();
			if (is_callable(array($purge_pagely, 'purgeAll'))) {
				$purge_pagely->purgeAll();

				$result[] = self::get_remote_caches_purged_message('Pagely');
			}
		}

		// Purge Pressidum
		if (defined('WP_NINUKIS_WP_NAME') && class_exists('Ninukis_Plugin') && is_callable(array('Ninukis_Plugin', 'get_instance'))) {
			$purge_pressidum = Ninukis_Plugin::get_instance();
			if (is_callable(array($purge_pressidum, 'purgeAllCaches'))) {
				$purge_pressidum->purgeAllCaches();

				$result[] = self::get_remote_caches_purged_message('Pressidium');
			}
		}

		// Purge Savvii
		if (defined('\Savvii\CacheFlusherPlugin::NAME_DOMAINFLUSH_NOW')) {
			$purge_savvii = new \Savvii\CacheFlusherPlugin();
			if (is_callable(array($purge_savvii, 'domainflush'))) {
				$purge_savvii->domainflush();

				$result[] = self::get_remote_caches_purged_message('Savvii');
			}
		}

		/**
		 * Action triggered when purging other plugins cache, and nothing was triggered
		 */
		do_action('wpo_min_after_purge_others');

		return $result;
	}

	/**
	 * Returns the purged cache message for the given plugin name
	 *
	 * @param string $plugin_name Name of the plugin
	 *
	 * @return string
	 */
	public static function get_caches_purged_message($plugin_name) {
		$message = sprintf(
			// translators: %s is a plugin name
			__('All caches from %s have also been purged.', 'wp-optimize'),
			'<strong>' . esc_html($plugin_name) . '</strong>'
		);

		return $message;
	}

	/**
	 * Returns remote purged cache message for given host name
	 *
	 * @param string $host_name
	 *
	 * @return string
	 */
	public static function get_remote_caches_purged_message($host_name) {
		$message = sprintf(
			// translators: %s is a remote cache system name
			__('A cache purge request has been sent to %s.', 'wp-optimize'),
			'<strong>' . esc_html($host_name) . '</strong>'
		);

		return $message;
	}

	/**
	 * Purge all public files on uninstallation
	 * This will break cached pages that ref minified JS/CSS
	 *
	 * @return Boolean
	 */
	public static function purge() {
		$log = '';
		if (is_dir(WPO_CACHE_MIN_FILES_DIR)) {
			if (wpo_delete_files(WPO_CACHE_MIN_FILES_DIR, true)) {
				$log = "[Minify] files and folders are deleted recursively";
			} else {
				$log = "[Minify] recursive files and folders deletion unsuccessful";
			}
			if (wp_optimize_minify_config()->get('debug')) {
				error_log($log); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_error_log -- Used for debugging
			}
		}
		return true;
	}

	/**
	 * Purge cache files older than 30 days
	 *
	 * @return array
	 */
	public static function purge_old() {
		if (!class_exists('WP_Optimize_Minify_Config')) {
			include_once WPO_PLUGIN_MAIN_PATH . 'minify/class-wp-optimize-minify-config.php';
		}
		$cache_time = wp_optimize_minify_config()->get('last-cache-update');
		$cache_lifespan = wp_optimize_minify_config()->get('cache_lifespan');

		/**
		 * Minify cache lifespan
		 *
		 * @param int The minify cache expiry timestamp
		 */
		$expires = apply_filters('wp_optimize_minify_cache_expiry_time', time() - 86400 * $cache_lifespan);
		$log = array();

		// get all directories that are a direct child of current directory
		if (is_dir(WPO_CACHE_MIN_FILES_DIR) && wp_is_writable(dirname(WPO_CACHE_MIN_FILES_DIR))) {
			if ($handle = opendir(WPO_CACHE_MIN_FILES_DIR)) {
				while (false !== ($d = readdir($handle))) {
					if (strcmp($d, '.')==0 || strcmp($d, '..')==0) {
						continue;
					}
					$log[] = "cache expiration time - $expires";
					$log[] = "checking if cache has expired - $d";
					if ($d != $cache_time && (is_numeric($d) && $d <= $expires)) {
						$dir = WPO_CACHE_MIN_FILES_DIR.'/'.$d;
						if (is_dir($dir)) {
							$log[] = "deleting cache in $dir";
							if (wpo_delete_files($dir, true)) {
								$log[] = "files and folders are deleted recursively - $dir";
							} else {
								$log[] = "recursive files and folders deletion unsuccessful - $dir";
							}
							if (file_exists($dir)) {
								if (rmdir($dir)) { // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_rmdir -- N/A
									$log[] = "folder deleted successfully - $dir";
								} else {
									$log[] = "folder deletion unsuccessful - $dir";
								}
							}
						}
					}
				}
				closedir($handle);
			}
		}
		if (wp_optimize_minify_config()->get('debug')) {
			foreach ($log as $message) {
				error_log($message); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_error_log -- Used for debugging
			}
		}

		return $log;
	}

	/**
	 * Get transients from the disk
	 *
	 * @return String|Boolean
	 */
	public static function get_transient($key) {
		$cache_path = self::cache_path();
		$tmp_dir = $cache_path['tmpdir'];
		$f = $tmp_dir.'/'.$key.'.transient';
		clearstatcache();
		if (file_exists($f)) {
			return file_get_contents($f);
		} else {
			return false;
		}
	}

	/**
	 * Set cache on disk
	 *
	 * @param String $key
	 * @param Mixed  $code
	 *
	 * @return Boolean
	 */
	public static function set_transient($key, $code) {
		if (is_null($code) || empty($code)) {
			return false;
		}
		$cache_path = self::cache_path();
		$tmp_dir = $cache_path['tmpdir'];
		$f = $tmp_dir.'/'.$key.'.transient';
		file_put_contents($f, $code);
		self::fix_permission_bits($f);
		return true;
	}

	/**
	 * Get the cache size and count
	 *
	 * @param string $folder
	 * @return String
	 */
	public static function get_cachestats($folder) {
		clearstatcache();
		if (is_dir($folder)) {
			$dir = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($folder, FilesystemIterator::SKIP_DOTS));
			$size = 0;
			$file_count = 0;
			foreach ($dir as $file) {
				$size += $file->getSize();
				$file_count++;
			}
			return WP_Optimize()->format_size($size) . ' ('.$file_count.' files)';
		} else {
			// translators: %s is a folder path
			return sprintf(__('Error: %s is not a directory!', 'wp-optimize'), $folder);
		}
	}

	/**
	 * Purge GoDaddy Managed WordPress Hosting (Varnish)
	 *
	 * Source: https://github.com/wp-media/wp-rocket/blob/master/inc/3rd-party/hosting/godaddy.php
	 *
	 * @param String      $method
	 * @param String|Null $url
	 */
	public static function godaddy_request($method, $url = null) {
		$url  = empty($url) ? home_url() : $url;
		$host = wp_parse_url($url, PHP_URL_HOST);
		$url  = set_url_scheme(str_replace($host, WPaas\Plugin::vip(), $url), 'http');
		wp_cache_flush();
		update_option('gd_system_last_cache_flush', time()); // purge apc
		wp_remote_request(esc_url_raw($url), array('method' => $method, 'blocking' => false, 'headers' => array('Host' => $host)));
	}

	/**
	 * List all cache files
	 *
	 * @param integer $stamp     A timestamp
	 * @param boolean $use_cache If true, do not use transient value
	 * @return array
	 */
	public static function get_cached_files($stamp = 0, $use_cache = true) {
		if ($use_cache && $files = get_transient('wpo_minify_get_cached_files')) {
			return $files;
		}
		$cache_path = self::cache_path();
		$cache_dir = $cache_path['cachedir'];
		$size = self::get_cachestats($cache_dir);
		$total_size = self::get_cachestats(WPO_CACHE_MIN_FILES_DIR);
		$o = wp_optimize_minify_config()->get();
		$cache_time = (0 == $o['last-cache-update']) ? __('Never.', 'wp-optimize') : self::format_date_time($o['last-cache-update']);
		$return = array(
			'js' => array(),
			'css' => array(),
			'stamp' => $stamp,
			'cachesize' => esc_html($size),
			'total_cache_size' => esc_html($total_size),
			'cacheTime' => $cache_time,
			'cachePath' => $cache_path['cachedir']
		);
		
		// Inspect directory with opendir, since glob might not be available in some systems
		clearstatcache();
		if (is_dir($cache_dir.'/') && $handle = opendir($cache_dir.'/')) {
			while (false !== ($file = readdir($handle))) {
				$file = $cache_dir.'/'.$file;
				$ext = pathinfo($file, PATHINFO_EXTENSION);
				if (in_array($ext, array('js', 'css'))) {
					$log = self::generate_log($file.'.json' );
					$min_css = substr($file, 0, -4).'.min.css';
					$minjs = substr($file, 0, -3).'.min.js';
					$file_name = basename($file);
					$file_url = trailingslashit($cache_path['cachedirurl']).$file_name;
					if ('css' == $ext && file_exists($min_css)) {
						$file_name = basename($min_css);
					}
					if ('js' == $ext && file_exists($minjs)) {
						$file_name = basename($minjs);
					}
					$file_size = WP_Optimize()->format_size(filesize($file));
					$uid = hash('adler32', $file_name);
					array_push($return[$ext], array('uid' => $uid, 'filename' => $file_name, 'file_url' => $file_url, 'log' => $log, 'fsize' => $file_size));
				}
			}
			closedir($handle);
		}
		set_transient('wpo_minify_get_cached_files', $return, DAY_IN_SECONDS);
		return $return;
	}

	/**
	 * Generate log information from a json file.
	 *
	 * @param string $file Full path of log file.
	 *
	 * @return object Could be either a 'json_decode' object upon successful parsing of the JSON file, or a stdClass object
	 *                upon failure. In the case of stdClass object, $obj->error will contain the error message.
	 */
	public static function generate_log($file) {
		$error_log = new stdClass();

		$cache_path = self::cache_path();
		$file_name = basename($file);
		$file_url = trailingslashit($cache_path['cachedirurl']) . $file_name;
		$file_link_html = '<a href="' . esc_url($file_url) . '" target="_blank">' . $file_name . '</a>';

		if (!file_exists($file)) {
			// translators: %s is a log file link
			$error_log->error = sprintf(__('Log file %s is missing', 'wp-optimize'), $file_link_html);
			return $error_log;
		}

		$log = json_decode(file_get_contents($file));

		$is_valid_json = json_last_error() === JSON_ERROR_NONE ? true : false;

		if (!$is_valid_json) {
			// translators: %1$s is a log file link, %2$s is the error message
			$error_log->error = sprintf(__('JSON error in file %1$s | Error details: %2$s', 'wp-optimize'), $file_link_html, json_last_error_msg());
			return $error_log;
		}

		if (!isset($log->header) || !isset($log->files)) {
			// translators: %s is a log file link
			$error_log->error = sprintf(__('Some data is missing in the log file %s', 'wp-optimize'), $file_link_html);
			return $error_log;
		}

		return $log;
	}

	/**
	 * Format a timestamp using WP's date_format and time_format
	 *
	 * @param integer $timestamp - The timestamp
	 * @return string
	 */
	public static function format_date_time($timestamp) {
		return WP_Optimize()->format_date_time($timestamp);
	}

	/**
	 * Format the log created when merging assets. Called via array_map
	 *
	 * @param array $files The files array, containing the 'log' object or array.
	 * @return array
	 */
	public static function format_file_logs($files) {
		$files['log'] = WP_Optimize()->include_template(
			'minify/cached-file-log.php',
			true,
			array(
				'log' => $files['log'],
				'minify_config' => wp_optimize_minify_config()->get(),
			)
		);
		return $files;
	}
}
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