Cache Enabler – WordPress Cache

Version Description

Update cache clearing for theme, plugin, post, and upgrade actions (#215 and #216)
Update cache handling with cache keys (#211)
Update settings file deletion handling (#205)
Update output buffer handling (#203)
Update removing CSS and JavaScript comments during HTML minification (#202)
Update WebP URL conversion for installations in a subdirectory (#198)
Add CACHE_ENABLER_DIR as definable plugin directory constant (#195 @stevegrunwell)
Add explicit directory access permissions (#194 @stevegrunwell)
Add exclusive lock when writing files (#191 @nawawi)
Fix clear cache request handling (#212)
Fix getting wp-config.php (#210 @stevegrunwell)

Release Info

Developer	keycdn
Plugin	Cache Enabler – WordPress Cache
Version	1.7.0
Comparing to
See all releases

Code changes from version 1.6.2 to 1.7.0

Files changed (6) hide show

advanced-cache.php +20 -11
cache-enabler.php +22 -11
inc/cache_enabler.class.php +219 -225
inc/cache_enabler_disk.class.php +399 -323
inc/cache_enabler_engine.class.php +87 -50
readme.txt +19 -6

advanced-cache.php CHANGED Viewed

	@@ -3,29 +3,38 @@
3	* Cache Enabler advanced cache
4	*
5	* @since 1.2.0
6	- * @change 1.6.0
7	*/
8
9	if ( ! defined( 'ABSPATH' ) ) {
10	exit;
11	}
12
13	- ~~$ce_dir = ( ( defined( 'WP_PLUGIN_DIR' ) ) ? WP_PLUGIN_DIR : WP_CONTENT_DIR . '/plugins' ) . '/cache-enabler';~~
14	- ~~$ce_engine_file~~ = ~~$ce_dir~~ . ~~'/inc/cache_enabler_engine~~.~~class.~~php';
15	- ~~$ce_disk_file =~~ ~~$ce_dir~~ . '/~~inc~~/~~cache_enabler_disk.class.php';~~









16
17	- if ( file_exists( $~~ce_engine_file~~ ) && file_exists( $~~ce_disk_file~~ ) ) {
18	- require_once $~~ce_engine_file~~;
19	- require_once $~~ce_disk_file~~;
20	}
21
22	if ( class_exists( 'Cache_Enabler_Engine' ) ) {
23	- $~~ce_engine_started~~ = Cache_Enabler_Engine::start();
24
25	- if ( $~~ce_engine_started~~ ) {
26	- $~~ce_cache_delivered~~ = Cache_Enabler_Engine::deliver_cache();
27
28	- if ( ! $~~ce_cache_delivered~~ ) {
29	Cache_Enabler_Engine::start_buffering();
30	}
31	}


3	* Cache Enabler advanced cache
4	*
5	* @since 1.2.0
6	+ * @change 1.7.0
7	*/
8
9	if ( ! defined( 'ABSPATH' ) ) {
10	exit;
11	}
12
13	+ /**
14	+ * set the CACHE_ENABLER_DIR constant without trailing slash in your wp-config.php file if the plugin resides
15	+ * somewhere other than path/to/wp-content/plugins/cache-enabler
16	+ */
17	+ if ( defined( 'CACHE_ENABLER_DIR' ) ) {
18	+ $cache_enabler_dir = CACHE_ENABLER_DIR;
19	+ } else {
20	+ $cache_enabler_dir = ( ( defined( 'WP_PLUGIN_DIR' ) ) ? WP_PLUGIN_DIR : WP_CONTENT_DIR . '/plugins' ) . '/cache-enabler';
21	+ }
22	+
23	+ $cache_enabler_engine_file = $cache_enabler_dir . '/inc/cache_enabler_engine.class.php';
24	+ $cache_enabler_disk_file = $cache_enabler_dir . '/inc/cache_enabler_disk.class.php';
25
26	+ if ( file_exists( $cache_enabler_engine_file ) && file_exists( $cache_enabler_disk_file ) ) {
27	+ require_once $cache_enabler_engine_file;
28	+ require_once $cache_enabler_disk_file;
29	}
30
31	if ( class_exists( 'Cache_Enabler_Engine' ) ) {
32	+ $cache_enabler_engine_started = Cache_Enabler_Engine::start();
33
34	+ if ( $cache_enabler_engine_started ) {
35	+ $cache_enabler_cache_delivered = Cache_Enabler_Engine::deliver_cache();
36
37	+ if ( ! $cache_enabler_cache_delivered ) {
38	Cache_Enabler_Engine::start_buffering();
39	}
40	}

cache-enabler.php CHANGED Viewed

	@@ -6,11 +6,11 @@ Description: Simple and fast WordPress caching plugin.
6	Author: KeyCDN
7	Author URI: https://www.keycdn.com
8	License: GPLv2 or later
9	- Version: 1.6.2
10	*/
11
12	/*
13	- Copyright (C) ~~2020~~ KeyCDN
14
15	This program is free software; you can redistribute it and/or modify
16	it under the terms of the GNU General Public License as published by
	@@ -32,12 +32,23 @@ if ( ! defined( 'ABSPATH' ) ) {
32	}
33
34	// constants
35	- define( '~~CE_VERSION~~', '1.6.2' );
36	- define( '~~CE_MIN_PHP~~', '5.6' );
37	- define( '~~CE_MIN_WP~~', '5.1' );
38	- define( '~~CE_FILE~~', __FILE__ );
39	- define( '~~CE_BASE~~', plugin_basename( __FILE__ ) );
40	- ~~define( 'CE_DIR', __DIR__ );~~











41
42	// hooks
43	add_action( 'plugins_loaded', array( 'Cache_Enabler', 'init' ) );
	@@ -51,10 +62,10 @@ spl_autoload_register( 'cache_enabler_autoload' );
51	// load required classes
52	function cache_enabler_autoload( $class_name ) {
53	// check if classes were loaded in advanced-cache.php
54	- if ( in_array( $class_name, array( 'Cache_Enabler', 'Cache_Enabler_Engine', 'Cache_Enabler_Disk' ) ) && ! class_exists( $class_name ) ) {
55	require_once sprintf(
56	'%s/inc/%s.class.php',
57	- ~~CE_DIR~~,
58	strtolower( $class_name )
59	);
60	}
	@@ -62,5 +73,5 @@ function cache_enabler_autoload( $class_name ) {
62
63	// load WP-CLI command
64	if ( defined( 'WP_CLI' ) && WP_CLI && class_exists( 'WP_CLI' ) ) {
65	- require_once ~~CE_DIR~~ . '/inc/cache_enabler_cli.class.php';
66	}


6	Author: KeyCDN
7	Author URI: https://www.keycdn.com
8	License: GPLv2 or later
9	+ Version: 1.7.0
10	*/
11
12	/*
13	+ Copyright (C) 2021 KeyCDN
14
15	This program is free software; you can redistribute it and/or modify
16	it under the terms of the GNU General Public License as published by

32	}
33
34	// constants
35	+ define( 'CACHE_ENABLER_VERSION', '1.7.0' );
36	+ define( 'CACHE_ENABLER_MIN_PHP', '5.6' );
37	+ define( 'CACHE_ENABLER_MIN_WP', '5.1' );
38	+ define( 'CACHE_ENABLER_FILE', __FILE__ );
39	+ define( 'CACHE_ENABLER_BASE', plugin_basename( __FILE__ ) );
40	+
41	+ if ( ! defined( 'CACHE_ENABLER_DIR' ) ) {
42	+ define( 'CACHE_ENABLER_DIR', __DIR__ );
43	+ }
44	+
45	+ // deprecated constants (1.7.0)
46	+ define( 'CE_VERSION', CACHE_ENABLER_VERSION );
47	+ define( 'CE_MIN_PHP', CACHE_ENABLER_MIN_PHP );
48	+ define( 'CE_MIN_WP', CACHE_ENABLER_MIN_WP );
49	+ define( 'CE_FILE', CACHE_ENABLER_FILE );
50	+ define( 'CE_BASE', CACHE_ENABLER_BASE );
51	+ define( 'CE_DIR', CACHE_ENABLER_DIR );
52
53	// hooks
54	add_action( 'plugins_loaded', array( 'Cache_Enabler', 'init' ) );

62	// load required classes
63	function cache_enabler_autoload( $class_name ) {
64	// check if classes were loaded in advanced-cache.php
65	+ if ( in_array( $class_name, array( 'Cache_Enabler', 'Cache_Enabler_Engine', 'Cache_Enabler_Disk' ), true ) && ! class_exists( $class_name ) ) {
66	require_once sprintf(
67	'%s/inc/%s.class.php',
68	+ CACHE_ENABLER_DIR,
69	strtolower( $class_name )
70	);
71	}

73
74	// load WP-CLI command
75	if ( defined( 'WP_CLI' ) && WP_CLI && class_exists( 'WP_CLI' ) ) {
76	+ require_once CACHE_ENABLER_DIR . '/inc/cache_enabler_cli.class.php';
77	}

inc/cache_enabler.class.php CHANGED Viewed

	@@ -50,7 +50,7 @@ final class Cache_Enabler {
50	* constructor
51	*
52	* @since 1.0.0
53	- * @change 1.6.1
54	*/
55
56	public function __construct() {
	@@ -72,14 +72,13 @@ final class Cache_Enabler {
72	// system clear cache hooks
73	add_action( '_core_updated_successfully', array( __CLASS__, 'clear_complete_cache' ) );
74	add_action( 'upgrader_process_complete', array( __CLASS__, 'on_upgrade' ), 10, 2 );
75	- add_action( 'switch_theme', array( __CLASS__, '~~clear_complete_cache~~' ) );
76	add_action( 'permalink_structure_changed', array( __CLASS__, 'clear_site_cache' ) );
77	add_action( 'activated_plugin', array( __CLASS__, 'on_plugin_activation_deactivation' ), 10, 2 );
78	add_action( 'deactivated_plugin', array( __CLASS__, 'on_plugin_activation_deactivation' ), 10, 2 );
79	- add_action( 'save_post', array( __CLASS__, '~~on_save_post~~' ) );
80	- add_action( '~~post_updated~~', array( __CLASS__, '~~on_post_updated~~' ), ~~10, 3~~ );
81	- add_action( '~~wp_trash_post~~', array( __CLASS__, '~~on_trash_post~~' ) );
82	- add_action( 'transition_post_status', array( __CLASS__, 'on_transition_post_status' ), 10, 3 );
83	add_action( 'comment_post', array( __CLASS__, 'on_comment_post' ), 99, 2 );
84	add_action( 'edit_comment', array( __CLASS__, 'on_edit_comment' ), 10, 2 );
85	add_action( 'transition_comment_status', array( __CLASS__, 'on_transition_comment_status' ), 10, 3 );
	@@ -111,7 +110,7 @@ final class Cache_Enabler {
111	add_action( 'admin_enqueue_scripts', array( __CLASS__, 'add_admin_resources' ) );
112	// dashboard
113	add_filter( 'dashboard_glance_items', array( __CLASS__, 'add_dashboard_cache_size' ) );
114	- add_filter( 'plugin_action_links_' . ~~CE_BASE~~, array( __CLASS__, 'add_plugin_action_links' ) );
115	add_filter( 'plugin_row_meta', array( __CLASS__, 'add_plugin_row_meta' ), 10, 2 );
116	// notices
117	add_action( 'admin_notices', array( __CLASS__, 'requirements_check' ) );
	@@ -144,7 +143,7 @@ final class Cache_Enabler {
144	* upgrade hook
145	*
146	* @since 1.2.3
147	- * @change 1.6.0
148	*
149	* @param WP_Upgrader $obj upgrade instance
150	* @param array $data update data
	@@ -152,16 +151,48 @@ final class Cache_Enabler {
152
153	public static function on_upgrade( $obj, $data ) {
154
155	- // if ~~setting~~ ~~enabled~~ ~~clear~~ ~~site~~ ~~cache~~ ~~on any plugin update~~
156	- ~~if ( Cache_Enabler_Engine::$settings['clear_site_cache_on_changed_plugin'] ) {~~
157	- ~~self::clear_site_cache();~~













158	}
159
160	- // ~~check~~ ~~if Cache Enabler has been updated~~
161	- if ( $data['~~action'] === 'update' && $data['~~type'] === 'plugin' && ~~array_key_exists~~( 'plugins', ~~$data~~ ) ) {
162	- ~~foreach~~ ( (array) $data['plugins'] ~~as $plugin_file ) {~~
163	- ~~if ( $plugin_file === CE_BASE ) {~~
164	- ~~self::on_ce_update();~~



















165	}
166	}
167	}
	@@ -172,10 +203,10 @@ final class Cache_Enabler {
172	* Cache Enabler update actions
173	*
174	* @since 1.4.0
175	- * @change 1.6.0
176	*/
177
178	- public static function ~~on_ce_update~~() {
179
180	// clean system files
181	self::each_site( is_multisite(), 'Cache_Enabler_Disk::clean' );
	@@ -225,7 +256,7 @@ final class Cache_Enabler {
225	* install on new site in multisite network
226	*
227	* @since 1.0.0
228	- * @change 1.6.0
229	*
230	* @param WP_Site $new_site new site instance
231	*/
	@@ -233,7 +264,7 @@ final class Cache_Enabler {
233	public static function install_later( $new_site ) {
234
235	// check if network activated
236	- if ( ! is_plugin_active_for_network( ~~CE_BASE~~ ) ) {
237	return;
238	}
239
	@@ -252,9 +283,9 @@ final class Cache_Enabler {
252	* add or update backend requirements
253	*
254	* @since 1.5.0
255	- * @change 1.6.0
256	*
257	- * @return $new_option_value new or current database option value
258	*/
259
260	public static function update_backend() {
	@@ -281,6 +312,9 @@ final class Cache_Enabler {
281	// merge defined settings into default settings
282	$new_option_value = wp_parse_args( $old_option_value, self::get_default_settings() );
283



284	// add or update database option
285	update_option( 'cache_enabler', $new_option_value );
286
	@@ -348,7 +382,7 @@ final class Cache_Enabler {
348	* enter each site
349	*
350	* @since 1.5.0
351	- * @change 1.5.0
352	*
353	* @param boolean $network whether or not each site in network
354	* @param string $callback callback function
	@@ -362,14 +396,16 @@ final class Cache_Enabler {
362
363	if ( $network ) {
364	$blog_ids = self::get_blog_ids();

365	// switch to each site in network
366	foreach ( $blog_ids as $blog_id ) {
367	switch_to_blog( $blog_id );
368	- $callback_return[] = ~~(int)~~ call_user_func_array( $callback, $callback_params );
369	restore_current_blog();
370	}
371	} else {
372	- $~~callback_return[]~~ = ~~(int) call_user_func_array( $callback, $callback_params )~~;

373	}
374
375	return $callback_return;
	@@ -396,7 +432,7 @@ final class Cache_Enabler {
396	* get settings from database
397	*
398	* @since 1.0.0
399	- * @change 1.5.0
400	*
401	* @return array $settings current settings from database
402	*/
	@@ -407,7 +443,7 @@ final class Cache_Enabler {
407	$settings = get_option( 'cache_enabler' );
408
409	// if database option does not exist or settings are outdated
410	- if ( $settings === false \|\| isset( $settings['version'] ) && $settings['version'] !== ~~CE_VERSION~~ ) {
411	$settings = self::update_backend();
412	}
413
	@@ -419,18 +455,19 @@ final class Cache_Enabler {
419	* get blog IDs
420	*
421	* @since 1.0.0
422	- * @change 1.6.0
423	*
424	* @return array $blog_ids blog IDs
425	*/
426
427	private static function get_blog_ids() {
428
429	- $blog_ids = array( '1' );
430
431	if ( is_multisite() ) {
432	global $wpdb;
433	- ~~$blog_ids = $wpdb->get_col( "SELECT blog_id FROM $wpdb->blogs" );~~

434	}
435
436	return $blog_ids;
	@@ -513,10 +550,10 @@ final class Cache_Enabler {
513
514
515	/**
516	- * get cache size
517	*
518	* @since 1.0.0
519	- * @change 1.5.0
520	*
521	* @return integer $cache_size cache size in bytes
522	*/
	@@ -526,7 +563,7 @@ final class Cache_Enabler {
526	$cache_size = get_transient( self::get_cache_size_transient_name() );
527
528	if ( ! $cache_size ) {
529	- $cache_size = Cache_Enabler_Disk::~~cache_size~~();
530	set_transient( self::get_cache_size_transient_name(), $cache_size, MINUTE_IN_SECONDS * 15 );
531	}
532
	@@ -572,7 +609,7 @@ final class Cache_Enabler {
572	* get default settings
573	*
574	* @since 1.0.0
575	- * @change 1.6.1
576	*
577	* @param string $settings_type default `system` settings
578	* @return array $system_default_settings\|$default_settings only default system settings or all default settings
	@@ -581,7 +618,7 @@ final class Cache_Enabler {
581	private static function get_default_settings( $settings_type = null ) {
582
583	$system_default_settings = array(
584	- 'version' => (string) ~~CE_VERSION~~,
585	'permalink_structure' => (string) self::get_permalink_structure(),
586	);
587
	@@ -595,14 +632,15 @@ final class Cache_Enabler {
595	'clear_site_cache_on_saved_post' => 0,
596	'clear_site_cache_on_saved_comment' => 0,
597	'clear_site_cache_on_changed_plugin' => 0,
598	- 'compress_cache' => 0,
599	'convert_image_urls_to_webp' => 0,




600	'excluded_post_ids' => '',
601	'excluded_page_paths' => '',
602	'excluded_query_strings' => '',
603	'excluded_cookies' => '',
604	- 'minify_html' => 0,
605	- 'minify_inline_css_js' => 0,
606	);
607
608	// merge default settings
	@@ -650,8 +688,8 @@ final class Cache_Enabler {
650	'update_product_stock' => '', // deprecated
651	'new_comment' => 'clear_site_cache_on_saved_comment',
652	'clear_on_upgrade' => 'clear_site_cache_on_changed_plugin',
653	- 'compress' => 'compress_cache',
654	'webp' => 'convert_image_urls_to_webp',

655	'excl_ids' => 'excluded_post_ids',
656	'excl_paths' => 'excluded_page_paths',
657	'excl_cookies' => 'excluded_cookies',
	@@ -671,6 +709,7 @@ final class Cache_Enabler {
671	if ( ! empty( $new_name ) ) {
672	$settings[ $new_name ] = $settings[ $old_name ];
673	}

674	unset( $settings[ $old_name ] );
675	}
676	}
	@@ -683,7 +722,7 @@ final class Cache_Enabler {
683	* add plugin action links in the plugins list table
684	*
685	* @since 1.0.0
686	- * @change 1.5.0
687	*
688	* @param array $action_links action links
689	* @return array $action_links updated action links if applicable, unchanged otherwise
	@@ -696,17 +735,12 @@ final class Cache_Enabler {
696	return $action_links;
697	}
698
699	- // ~~append~~ action link
700	- $action_links ~~= wp_parse_args~~(
701	- ~~array(~~
702	- ~~sprintf~~(
703	- '<a ~~href="%s">%s</a>~~',
704	- ~~admin_url(~~ ~~'options-general.php?page=cache-enabler'~~ ),
705	- esc_html__( 'Settings', 'cache-enabler' )
706	- )
707	- ),
708	- $action_links
709	- );
710
711	return $action_links;
712	}
	@@ -716,7 +750,7 @@ final class Cache_Enabler {
716	* add plugin metadata in the plugins list table
717	*
718	* @since 1.0.0
719	- * @change 1.5.0
720	*
721	* @param array $plugin_meta plugin metadata, including the version, author, author URI, and plugin URI
722	* @param string $plugin_file path to the plugin file relative to the plugins directory
	@@ -726,7 +760,7 @@ final class Cache_Enabler {
726	public static function add_plugin_row_meta( $plugin_meta, $plugin_file ) {
727
728	// check if Cache Enabler row
729	- if ( $plugin_file !== ~~CE_BASE~~ ) {
730	return $plugin_meta;
731	}
732
	@@ -783,7 +817,7 @@ final class Cache_Enabler {
783	* @since 1.0.0
784	* @change 1.6.0
785	*
786	- * @param object menu properties
787	*/
788
789	public static function add_admin_bar_items( $wp_admin_bar ) {
	@@ -832,14 +866,14 @@ final class Cache_Enabler {
832	* enqueue styles and scripts
833	*
834	* @since 1.0.0
835	- * @change 1.5.0
836	*/
837
838	public static function add_admin_resources( $hook ) {
839
840	// settings page
841	if ( $hook === 'settings_page_cache-enabler' ) {
842	- wp_enqueue_style( 'cache-enabler-settings', plugins_url( 'css/settings.min.css', ~~CE_FILE~~ ), array(), ~~CE_VERSION~~ );
843	}
844	}
845
	@@ -890,7 +924,7 @@ final class Cache_Enabler {
890	* process clear cache request
891	*
892	* @since 1.0.0
893	- * @change 1.6.0
894	*/
895
896	public static function process_clear_cache_request() {
	@@ -912,8 +946,7 @@ final class Cache_Enabler {
912
913	// clear page cache
914	if ( $_GET['_action'] === 'clearurl' ) {
915	- // ~~set~~ ~~clear~~ ~~URL~~ ~~without~~ ~~query~~ ~~string~~
916	- $clear_url = parse_url( home_url(), PHP_URL_SCHEME ) . '://' . parse_url( home_url(), PHP_URL_HOST ) . preg_replace( '/\?.*/', '', $_SERVER['REQUEST_URI'] );
917	self::clear_page_cache_by_url( $clear_url );
918	// clear site(s) cache
919	} elseif ( $_GET['_action'] === 'clear' ) {
	@@ -921,7 +954,7 @@ final class Cache_Enabler {
921	}
922
923	// redirect to same page
924	- wp_safe_redirect( ~~wp_get_referer~~() );
925
926	// set transient for clear notice
927	if ( is_admin() ) {
	@@ -937,7 +970,7 @@ final class Cache_Enabler {
937	* admin notice after cache has been cleared
938	*
939	* @since 1.0.0
940	- * @change 1.6.0
941	*/
942
943	public static function cache_cleared_notice() {
	@@ -948,7 +981,7 @@ final class Cache_Enabler {
948	}
949
950	if ( get_transient( self::get_cache_cleared_transient_name() ) ) {
951	- ~~echo sprintf~~(
952	'<div class="notice notice-success is-dismissible"><p><strong>%s</strong></p></div>',
953	( is_multisite() && is_network_admin() ) ? esc_html__( 'Network cache cleared.', 'cache-enabler' ) : esc_html__( 'Site cache cleared.', 'cache-enabler' )
954	);
	@@ -959,81 +992,43 @@ final class Cache_Enabler {
959
960
961	/**
962	- * save post hook
963	*
964	* @since 1.5.0
965	- * @change 1.5.0
966	*
967	* @param integer $post_id post ID
968	*/
969
970	- public static function ~~on_save_post~~( $post_id ) {
971	-
972	- // if any published post type is created or updated
973	- if ( get_post_status( $post_id ) === 'publish' ) {
974	- self::clear_cache_on_post_save( $post_id );
975	- }
976	- }
977	-
978	-
979	- /**
980	- * post updated hook
981	- *
982	- * @since 1.5.0
983	- * @change 1.5.0
984	- *
985	- * @param integer $post_id post ID
986	- * @param WP_Post $post_after post instance following the update
987	- * @param WP_Post $post_before post instance before the update
988	- */
989
990	- ~~public~~ ~~static~~ ~~function on_post_updated~~( $post_id, ~~$post_after, $post_before~~ ) {
991
992	- // if ~~setting disabled and~~ any published post type ~~author~~ ~~changes~~
993	- if ( $~~post_before->post_author~~ ~~!==~~ ~~$post_after->post_author~~ ) {
994	- if ( ! ~~Cache_Enabler_Engine::$settings['clear_site_cache_on_saved_post']~~ ) {
995	- // clear before the update author archives
996	- self::clear_author_archives_cache_by_user_id( $post_before->post_author );
997	- }
998	}
999	}
1000
1001
1002	/**
1003	- * ~~trash~~ post hook
1004	*
1005	- * @since 1.4.0
1006	- * @change 1.5.0
1007	*
1008	- * @param integer $post_id post ID

1009	*/
1010
1011	- public static function ~~on_trash_post~~( $post_id ) {
1012	-
1013	- // if any published post type is trashed
1014	- if ( get_post_status( $post_id ) === 'publish' ) {
1015	- $trashed = true;
1016	- self::clear_cache_on_post_save( $post_id, $trashed );
1017	- }
1018	- }
1019	-
1020	-
1021	- /**
1022	- * transition post status hook
1023	- *
1024	- * @since 1.5.0
1025	- * @change 1.5.0
1026	- *
1027	- * @param string $new_status new post status
1028	- * @param string $old_status old post status
1029	- * @param WP_Post $post post instance
1030	- */
1031
1032	- ~~public~~ ~~static~~ ~~function on_transition_post_status~~( $~~new_status,~~ ~~$old_status, $post~~ ) {

1033
1034	- // if any published post type ~~status~~ ~~has~~ ~~changed~~
1035	- if ( $~~old_status~~ === 'publish' && ~~in_array(~~ $~~new_status,~~ ~~array(~~ '~~future~~', ~~'draft', 'pending', 'private'~~ ) ~~) )~~ {
1036	- self::clear_cache_on_post_save( $~~post->ID~~ );
1037	}
1038	}
1039
	@@ -1221,8 +1216,8 @@ final class Cache_Enabler {
1221	// get post type archives URL
1222	$post_type_archives_url = get_post_type_archive_link( $post_type );
1223

1224	if ( ! empty( $post_type_archives_url ) ) {
1225	- // clear post type archives page and its pagination page(s) cache
1226	self::clear_page_cache_by_url( $post_type_archives_url, 'pagination' );
1227	}
1228	}
	@@ -1232,7 +1227,7 @@ final class Cache_Enabler {
1232	* clear taxonomies archives pages cache by post ID
1233	*
1234	* @since 1.5.0
1235	- * @change 1.5.0
1236	*
1237	* @param integer $post_id post ID
1238	*/
	@@ -1246,11 +1241,13 @@ final class Cache_Enabler {
1246	if ( wp_count_terms( $taxonomy ) > 0 ) {
1247	// get terms attached to post
1248	$term_ids = wp_get_post_terms( $post_id, $taxonomy, array( 'fields' => 'ids' ) );

1249	foreach ( $term_ids as $term_id ) {

1250	$term_archives_url = get_term_link( (int) $term_id, $taxonomy );
1251	- ~~// validate URL and ensure it does not have a query string~~
1252	- if ( ~~filter_var(~~ ~~$term_archives_url,~~ ~~FILTER_VALIDATE_URL~~ ) && ! ~~filter_var(~~ ~~$term_archives_url,~~ ~~FILTER_VALIDATE_URL,~~ ~~FILTER_FLAG_QUERY_REQUIRED~~ ) ) {
1253	- // ~~clear~~ ~~taxonomy~~ ~~archives~~ ~~page~~ ~~and~~ ~~its~~ ~~pagination~~ ~~page(s~~) ~~cache~~
1254	self::clear_page_cache_by_url( $term_archives_url, 'pagination' );
1255	}
1256	}
	@@ -1312,7 +1309,7 @@ final class Cache_Enabler {
1312	* clear page cache by post ID
1313	*
1314	* @since 1.0.0
1315	- * @change 1.5.0
1316	*
1317	* @param integer\|string $post_id post ID
1318	* @param string $clear_type clear the `pagination` cache or all `subpages` cache instead of only the `page` cache
	@@ -1321,17 +1318,15 @@ final class Cache_Enabler {
1321	public static function clear_page_cache_by_post_id( $post_id, $clear_type = 'page' ) {
1322
1323	// validate integer
1324	- if ( ~~! is_int~~( $post_id ~~) ) {~~
1325	- // if string try to convert to integer
1326	- $post_id = (int) $post_id;
1327	- // conversion failed
1328	- if ( ! $post_id ) {
1329	- return;
1330	- }
1331	- }
1332
1333	- // ~~clear~~ page ~~cache~~
1334	- ~~self::clear_page_cache_by_url~~( get_permalink( $post_id ), ~~$clear_type~~ );





1335	}
1336
1337
	@@ -1355,7 +1350,7 @@ final class Cache_Enabler {
1355	* clear site cache by blog ID
1356	*
1357	* @since 1.4.0
1358	- * @change 1.6.1
1359	*
1360	* @param integer\|string $blog_id blog ID
1361	* @param boolean $delete_cache_size_transient whether or not the cache size transient should be deleted
	@@ -1364,17 +1359,10 @@ final class Cache_Enabler {
1364	public static function clear_site_cache_by_blog_id( $blog_id, $delete_cache_size_transient = true ) {
1365
1366	// validate integer
1367	- if ( ~~! is_int~~( $blog_id ~~) ) {~~
1368	- // if string try to convert to integer
1369	- $blog_id = (int) $blog_id;
1370	- // conversion failed
1371	- if ( ! $blog_id ) {
1372	- return;
1373	- }
1374	- }
1375
1376	// check if blog ID exists
1377	- if ( ! in_array( $blog_id, self::get_blog_ids() ) ) {
1378	return;
1379	}
1380
	@@ -1413,31 +1401,33 @@ final class Cache_Enabler {
1413
1414
1415	/**
1416	- * clear cache when any post type is created or ~~updated~~
1417	*
1418	* @since 1.5.0
1419	- * @change 1.5.0
1420	*
1421	- * @param integer $~~post_id~~ post ID
1422	- * @param boolean $trashed whether this is an existing post being trashed
1423	*/
1424
1425	- public static function clear_cache_on_post_save( $~~post_id,~~ ~~$trashed = false~~ ) {




1426
1427	- // ~~get~~ post ~~data~~
1428	- ~~$post = get_post( $post_id )~~;




1429
1430	// if setting enabled clear site cache
1431	if ( Cache_Enabler_Engine::$settings['clear_site_cache_on_saved_post'] ) {
1432	self::clear_site_cache();
1433	// clear page and/or associated cache otherwise
1434	} else {
1435	- // if ~~updated or trashed clear page cache~~
1436	- if ( strtotime( $post->post_modified_gmt ) > strtotime( $post->post_date_gmt ) \|\| $trashed ) {
1437	- self::clear_page_cache_by_post_id( $post_id );
1438	- }
1439	-
1440	- // clear associated cache
1441	self::clear_associated_cache( $post );
1442	}
1443	}
	@@ -1447,7 +1437,7 @@ final class Cache_Enabler {
1447	* check plugin requirements
1448	*
1449	* @since 1.1.0
1450	- * @change 1.6.1
1451	*/
1452
1453	public static function requirements_check() {
	@@ -1458,34 +1448,34 @@ final class Cache_Enabler {
1458	}
1459
1460	// check PHP version
1461	- if ( version_compare( PHP_VERSION, ~~CE_MIN_PHP~~, '<' ) ) {
1462	- ~~echo sprintf~~(
1463	'<div class="notice notice-error"><p>%s</p></div>',
1464	sprintf(
1465	// translators: 1. Cache Enabler 2. PHP version (e.g. 5.6)
1466	esc_html__( '%1$s requires PHP %2$s or higher to function properly. Please update PHP or disable the plugin.', 'cache-enabler' ),
1467	'<strong>Cache Enabler</strong>',
1468	- ~~CE_MIN_PHP~~
1469	)
1470	);
1471	}
1472
1473	// check WordPress version
1474	- if ( version_compare( $GLOBALS['wp_version'], ~~CE_MIN_WP~~ . 'alpha', '<' ) ) {
1475	- ~~echo sprintf~~(
1476	'<div class="notice notice-error"><p>%s</p></div>',
1477	sprintf(
1478	// translators: 1. Cache Enabler 2. WordPress version (e.g. 5.1)
1479	esc_html__( '%1$s requires WordPress %2$s or higher to function properly. Please update WordPress or disable the plugin.', 'cache-enabler' ),
1480	'<strong>Cache Enabler</strong>',
1481	- ~~CE_MIN_WP~~
1482	)
1483	);
1484	}
1485
1486	// check advanced-cache.php drop-in
1487	if ( ! file_exists( WP_CONTENT_DIR . '/advanced-cache.php' ) ) {
1488	- ~~echo sprintf~~(
1489	'<div class="notice notice-warning"><p>%s</p></div>',
1490	sprintf(
1491	// translators: 1. Cache Enabler 2. advanced-cache.php 3. wp-content/plugins/cache-enabler 4. wp-content
	@@ -1500,7 +1490,7 @@ final class Cache_Enabler {
1500
1501	// check permalink structure
1502	if ( Cache_Enabler_Engine::$settings['permalink_structure'] === 'plain' && current_user_can( 'manage_options' ) ) {
1503	- ~~echo sprintf~~(
1504	'<div class="notice notice-warning"><p>%s</p></div>',
1505	sprintf(
1506	// translators: 1. Cache Enabler 2. Permalink Settings
	@@ -1517,7 +1507,7 @@ final class Cache_Enabler {
1517
1518	// check file permissions
1519	if ( file_exists( dirname( Cache_Enabler_Disk::$cache_dir ) ) && ! is_writable( dirname( Cache_Enabler_Disk::$cache_dir ) ) ) {
1520	- ~~echo sprintf~~(
1521	'<div class="notice notice-warning"><p>%s</p></div>',
1522	sprintf(
1523	// translators: 1. Cache Enabler 2. 755 3. wp-content/cache 4. file permissions
	@@ -1536,7 +1526,7 @@ final class Cache_Enabler {
1536
1537	// check Autoptimize HTML optimization
1538	if ( defined( 'AUTOPTIMIZE_PLUGIN_DIR' ) && Cache_Enabler_Engine::$settings['minify_html'] && get_option( 'autoptimize_html', '' ) !== '' ) {
1539	- ~~echo sprintf~~(
1540	'<div class="notice notice-warning"><p>%s</p></div>',
1541	sprintf(
1542	// translators: 1. Autoptimize 2. Cache Enabler Settings
	@@ -1614,7 +1604,7 @@ final class Cache_Enabler {
1614	* validate settings
1615	*
1616	* @since 1.0.0
1617	- * @change 1.6.1
1618	*
1619	* @param array $settings user defined settings
1620	* @return array $validated_settings validated settings
	@@ -1622,25 +1612,21 @@ final class Cache_Enabler {
1622
1623	public static function validate_settings( $settings ) {
1624
1625	- // validate array
1626	- if ( ! is_array( $settings ) ) {
1627	- return;
1628	- }
1629	-
1630	$validated_settings = array(
1631	'cache_expires' => (int) ( ! empty( $settings['cache_expires'] ) ),
1632	- 'cache_expiry_time' => (int) @$settings['cache_expiry_time'],
1633	'clear_site_cache_on_saved_post' => (int) ( ! empty( $settings['clear_site_cache_on_saved_post'] ) ),
1634	'clear_site_cache_on_saved_comment' => (int) ( ! empty( $settings['clear_site_cache_on_saved_comment'] ) ),
1635	'clear_site_cache_on_changed_plugin' => (int) ( ! empty( $settings['clear_site_cache_on_changed_plugin'] ) ),
1636	- 'compress_cache' => (int) ( ! empty( $settings['compress_cache'] ) ),
1637	'convert_image_urls_to_webp' => (int) ( ! empty( $settings['convert_image_urls_to_webp'] ) ),
1638	- '~~excluded_post_ids~~' => (~~string~~) ~~sanitize_text_field~~( @$settings['~~excluded_post_ids~~'] ),
1639	- '~~excluded_page_paths~~' => (~~string~~) ~~self::validate_regex~~( @$settings['~~excluded_page_paths~~'] ),
1640	- 'excluded_query_strings' => (string) self::validate_regex( @$settings['excluded_query_strings'] ),
1641	- 'excluded_cookies' => (string) self::validate_regex( @$settings['excluded_cookies'] ),
1642	'minify_html' => (int) ( ! empty( $settings['minify_html'] ) ),
1643	'minify_inline_css_js' => (int) ( ! empty( $settings['minify_inline_css_js'] ) ),




1644	);
1645
1646	// add default system settings
	@@ -1660,7 +1646,7 @@ final class Cache_Enabler {
1660	* settings page
1661	*
1662	* @since 1.0.0
1663	- * @change 1.6.1
1664	*/
1665
1666	public static function settings_page() {
	@@ -1668,9 +1654,7 @@ final class Cache_Enabler {
1668	?>
1669
1670	<div id="cache_enabler_settings" class="wrap">
1671	- <h2>
1672	- <?php esc_html_e( 'Cache Enabler Settings', 'cache-enabler' ); ?>
1673	- </h2>
1674
1675	<?php
1676	if ( defined( 'WP_CACHE' ) && ! WP_CACHE ) {
	@@ -1690,13 +1674,13 @@ final class Cache_Enabler {
1690
1691	<div class="notice notice-info">
1692	<p>
1693	- <?php
1694	- printf(
1695	- // translators: %s: KeyCDN
1696	- esc_html__( 'Combine %s with ~~Cache~~ ~~Enabler~~ for even better WordPress performance and achieve the next level of caching with a CDN.', 'cache-enabler' ),
1697	- '<strong><a href="https://www.keycdn.com?utm_source=wp-admin&utm_medium=plugins&utm_campaign=cache-enabler">KeyCDN</a></strong>'
1698	- );
1699	- ?>
1700	</p>
1701	</div>
1702
	@@ -1710,15 +1694,15 @@ final class Cache_Enabler {
1710	<td>
1711	<fieldset>
1712	<p class="subheading"><?php esc_html_e( 'Expiration', 'cache-enabler' ); ?></p>
1713	- <label for="~~cache_expires~~" class="checkbox--form-control">
1714	- <input name="cache_enabler[cache_expires]" type="checkbox" id="~~cache_expires~~" value="1" <?php checked( '1', Cache_Enabler_Engine::$settings['cache_expires'] ); ?> />
1715	</label>
1716	- <label for="~~cache_expiry_time~~">
1717	<?php
1718	printf(
1719	- // translators: %s: ~~Number~~ of hours.
1720	esc_html__( 'Cached pages expire %s hours after being created.', 'cache-enabler' ),
1721	- '<input name="cache_enabler[cache_expiry_time]" type="number" id="~~cache_expiry_time~~" value="' . Cache_Enabler_Engine::$settings['cache_expiry_time'] . '" class="small-text">'
1722	);
1723	?>
1724	</label>
	@@ -1726,30 +1710,30 @@ final class Cache_Enabler {
1726	<br />
1727
1728	<p class="subheading"><?php esc_html_e( 'Clearing', 'cache-enabler' ); ?></p>
1729	- <label for="~~clear_site_cache_on_saved_post~~">
1730	- <input name="cache_enabler[clear_site_cache_on_saved_post]" type="checkbox" id="~~clear_site_cache_on_saved_post~~" value="1" <?php checked( '1', Cache_Enabler_Engine::$settings['clear_site_cache_on_saved_post'] ); ?> />
1731	<?php esc_html_e( 'Clear the site cache if any post type has been published, updated, or trashed (instead of only the page and/or associated cache).', 'cache-enabler' ); ?>
1732	</label>
1733
1734	<br />
1735
1736	- <label for="~~clear_site_cache_on_saved_comment~~">
1737	- <input name="cache_enabler[clear_site_cache_on_saved_comment]" type="checkbox" id="~~clear_site_cache_on_saved_comment~~" value="1" <?php checked( '1', Cache_Enabler_Engine::$settings['clear_site_cache_on_saved_comment'] ); ?> />
1738	<?php esc_html_e( 'Clear the site cache if a comment has been posted, updated, spammed, or trashed (instead of only the page cache).', 'cache-enabler' ); ?>
1739	</label>
1740
1741	<br />
1742
1743	- <label for="~~clear_site_cache_on_changed_plugin~~">
1744	- <input name="cache_enabler[clear_site_cache_on_changed_plugin]" type="checkbox" id="~~clear_site_cache_on_changed_plugin~~" value="1" <?php checked( '1', Cache_Enabler_Engine::$settings['clear_site_cache_on_changed_plugin'] ); ?> />
1745	- <?php esc_html_e( 'Clear the site cache if a plugin has been activated, ~~updated,~~ or deactivated.', 'cache-enabler' ); ?>
1746	</label>
1747
1748	<br />
1749
1750	<p class="subheading"><?php esc_html_e( 'Variants', 'cache-enabler' ); ?></p>
1751	- <label for="~~convert_image_urls_to_webp~~">
1752	- <input name="cache_enabler[convert_image_urls_to_webp]" type="checkbox" id="~~convert_image_urls_to_webp~~" value="1" <?php checked( '1', Cache_Enabler_Engine::$settings['convert_image_urls_to_webp'] ); ?> />
1753	<?php
1754	printf(
1755	// translators: %s: Optimus
	@@ -1761,24 +1745,31 @@ final class Cache_Enabler {
1761
1762	<br />
1763
1764	- <label for="~~compress_cache~~">
1765	- <input name="cache_enabler[~~compress_cache~~]" type="checkbox" id="~~compress_cache~~" value="1" <?php checked( '1', Cache_Enabler_Engine::$settings['~~compress_cache~~'] ); ?> />







1766	<?php esc_html_e( 'Pre-compress cached pages with Gzip.', 'cache-enabler' ); ?>
1767	</label>
1768
1769	<br />
1770
1771	<p class="subheading"><?php esc_html_e( 'Minification', 'cache-enabler' ); ?></p>
1772	- <label for="~~minify_html~~" class="checkbox--form-control">
1773	- <input name="cache_enabler[minify_html]" type="checkbox" id="~~minify_html~~" value="1" <?php checked( '1', Cache_Enabler_Engine::$settings['minify_html'] ); ?> />
1774	</label>
1775	- <label for="~~minify_inline_css_js~~">
1776	<?php
1777	$minify_inline_css_js_options = array(
1778	esc_html__( 'excluding', 'cache-enabler' ) => 0,
1779	esc_html__( 'including', 'cache-enabler' ) => 1,
1780	);
1781	- $minify_inline_css_js = '<select name="cache_enabler[minify_inline_css_js]" id="~~minify_inline_css_js~~">';
1782	foreach ( $minify_inline_css_js_options as $key => $value ) {
1783	$minify_inline_css_js .= '<option value="' . esc_attr( $value ) . '"' . selected( $value, Cache_Enabler_Engine::$settings['minify_inline_css_js'], false ) . '>' . $key . '</option>';
1784	}
	@@ -1801,13 +1792,16 @@ final class Cache_Enabler {
1801	<td>
1802	<fieldset>
1803	<p class="subheading"><?php esc_html_e( 'Post IDs', 'cache-enabler' ); ?></p>
1804	- <label for="~~excluded_post_ids~~">
1805	- <input name="cache_enabler[excluded_post_ids]" type="text" id="~~excluded_post_ids~~" value="<?php echo esc_attr( Cache_Enabler_Engine::$settings['excluded_post_ids'] ) ?>" class="regular-text" />
1806	<p class="description">
1807	- <?php
1808	- // translators: %s: ,
1809	- printf( ~~esc_html__( 'Post IDs separated by a %s that should bypass the cache.', 'cache-enabler' ), '<code class="code--form-control">,</code>' );~~
1810	- ?>



1811	</p>
1812	<p><?php esc_html_e( 'Example:', 'cache-enabler' ); ?> <code class="code--form-control">2,43,65</code></p>
1813	</label>
	@@ -1815,8 +1809,8 @@ final class Cache_Enabler {
1815	<br />
1816
1817	<p class="subheading"><?php esc_html_e( 'Page Paths', 'cache-enabler' ); ?></p>
1818	- <label for="~~excluded_page_paths~~">
1819	- <input name="cache_enabler[excluded_page_paths]" type="text" id="~~excluded_page_paths~~" value="<?php echo esc_attr( Cache_Enabler_Engine::$settings['excluded_page_paths'] ) ?>" class="regular-text code" />
1820	<p class="description"><?php esc_html_e( 'A regex matching page paths that should bypass the cache.', 'cache-enabler' ); ?></p>
1821	<p><?php esc_html_e( 'Example:', 'cache-enabler' ); ?> <code class="code--form-control">/^(\/\|\/forums\/)$/</code></p>
1822	</label>
	@@ -1824,8 +1818,8 @@ final class Cache_Enabler {
1824	<br />
1825
1826	<p class="subheading"><?php esc_html_e( 'Query Strings', 'cache-enabler' ); ?></p>
1827	- <label for="~~excluded_query_strings~~">
1828	- <input name="cache_enabler[excluded_query_strings]" type="text" id="~~excluded_query_strings~~" value="<?php echo esc_attr( Cache_Enabler_Engine::$settings['excluded_query_strings'] ) ?>" class="regular-text code" />
1829	<p class="description"><?php esc_html_e( 'A regex matching query strings that should bypass the cache.', 'cache-enabler' ); ?></p>
1830	<p><?php esc_html_e( 'Example:', 'cache-enabler' ); ?> <code class="code--form-control">/^nocache$/</code></p>
1831	<p><?php esc_html_e( 'Default if unset:', 'cache-enabler' ); ?> <code class="code--form-control">/^(?!(fbclid\|ref\|mc_(cid\|eid)\|utm_(source\|medium\|campaign\|term\|content\|expid)\|gclid\|fb_(action_ids\|action_types\|source)\|age-verified\|usqp\|cn-reloaded\|_ga\|_ke)).+$/</code></p>
	@@ -1834,8 +1828,8 @@ final class Cache_Enabler {
1834	<br />
1835
1836	<p class="subheading"><?php esc_html_e( 'Cookies', 'cache-enabler' ); ?></p>
1837	- <label for="~~excluded_cookies~~">
1838	- <input name="cache_enabler[excluded_cookies]" type="text" id="~~excluded_cookies~~" value="<?php echo esc_attr( Cache_Enabler_Engine::$settings['excluded_cookies'] ) ?>" class="regular-text code" />
1839	<p class="description"><?php esc_html_e( 'A regex matching cookies that should bypass the cache.', 'cache-enabler' ); ?></p>
1840	<p><?php esc_html_e( 'Example:', 'cache-enabler' ); ?> <code class="code--form-control">/^(comment_author\|woocommerce_items_in_cart\|wp_woocommerce_session)_?/</code></p>
1841	<p><?php esc_html_e( 'Default if unset:', 'cache-enabler' ); ?> <code class="code--form-control">/^(wp-postpass\|wordpress_logged_in\|comment_author)_/</code></p>
	@@ -1846,8 +1840,8 @@ final class Cache_Enabler {
1846	</table>
1847
1848	<p class="submit">
1849	- <input type="submit" class="button-secondary" value="<?php esc_html_e( 'Save Changes', 'cache-enabler' ); ?>" />
1850	- <input name="cache_enabler[clear_site_cache_on_saved_settings]" type="submit" class="button-primary" value="<?php esc_html_e( 'Save Changes and Clear Site Cache', 'cache-enabler' ); ?>" />
1851	</p>
1852	</form>
1853	</div>


50	* constructor
51	*
52	* @since 1.0.0
53	+ * @change 1.7.0
54	*/
55
56	public function __construct() {

72	// system clear cache hooks
73	add_action( '_core_updated_successfully', array( __CLASS__, 'clear_complete_cache' ) );
74	add_action( 'upgrader_process_complete', array( __CLASS__, 'on_upgrade' ), 10, 2 );
75	+ add_action( 'switch_theme', array( __CLASS__, 'clear_site_cache' ) );
76	add_action( 'permalink_structure_changed', array( __CLASS__, 'clear_site_cache' ) );
77	add_action( 'activated_plugin', array( __CLASS__, 'on_plugin_activation_deactivation' ), 10, 2 );
78	add_action( 'deactivated_plugin', array( __CLASS__, 'on_plugin_activation_deactivation' ), 10, 2 );
79	+ add_action( 'save_post', array( __CLASS__, 'on_save_trash_post' ) );
80	+ add_action( 'wp_trash_post', array( __CLASS__, 'on_save_trash_post' ) );
81	+ add_action( 'pre_post_update', array( __CLASS__, 'on_pre_post_update' ), 10, 2 );

82	add_action( 'comment_post', array( __CLASS__, 'on_comment_post' ), 99, 2 );
83	add_action( 'edit_comment', array( __CLASS__, 'on_edit_comment' ), 10, 2 );
84	add_action( 'transition_comment_status', array( __CLASS__, 'on_transition_comment_status' ), 10, 3 );

110	add_action( 'admin_enqueue_scripts', array( __CLASS__, 'add_admin_resources' ) );
111	// dashboard
112	add_filter( 'dashboard_glance_items', array( __CLASS__, 'add_dashboard_cache_size' ) );
113	+ add_filter( 'plugin_action_links_' . CACHE_ENABLER_BASE, array( __CLASS__, 'add_plugin_action_links' ) );
114	add_filter( 'plugin_row_meta', array( __CLASS__, 'add_plugin_row_meta' ), 10, 2 );
115	// notices
116	add_action( 'admin_notices', array( __CLASS__, 'requirements_check' ) );

143	* upgrade hook
144	*
145	* @since 1.2.3
146	+ * @change 1.7.0
147	*
148	* @param WP_Upgrader $obj upgrade instance
149	* @param array $data update data

151
152	public static function on_upgrade( $obj, $data ) {
153
154	+ if ( $data['action'] !== 'update' ) {
155	+ return;
156	+ }
157	+
158	+ // updated themes
159	+ if ( $data['type'] === 'theme' && isset( $data['themes'] ) ) {
160	+ $updated_themes = (array) $data['themes'];
161	+ $sites_themes = self::each_site( is_multisite(), 'wp_get_theme' );
162	+
163	+ // check each site
164	+ foreach ( $sites_themes as $blog_id => $site_theme ) {
165	+ // if the active or parent theme has been updated clear site cache
166	+ if ( in_array( $site_theme->stylesheet, $updated_themes, true ) \|\| in_array( $site_theme->template, $updated_themes, true ) ) {
167	+ self::clear_site_cache_by_blog_id( $blog_id );
168	+ }
169	+ }
170	}
171
172	+ // updated plugins
173	+ if ( $data['type'] === 'plugin' && isset( $data['plugins'] ) ) {
174	+ $updated_plugins = (array) $data['plugins'];
175	+
176	+ // check if Cache Enabler has been updated
177	+ if ( in_array( CACHE_ENABLER_BASE, $updated_plugins, true ) ) {
178	+ self::on_cache_enabler_update();
179	+ // check all updated plugins otherwise
180	+ } else {
181	+ $network_plugins = ( is_multisite() ) ? array_flip( (array) get_site_option( 'active_sitewide_plugins', array() ) ) : array();
182	+
183	+ // if a network activated plugin has been updated clear complete cache
184	+ if ( ! empty( array_intersect( $updated_plugins, $network_plugins ) ) ) {
185	+ self::clear_complete_cache();
186	+ // check each site otherwise
187	+ } else {
188	+ $sites_plugins = self::each_site( is_multisite(), 'get_option', array( 'active_plugins', array() ) );
189	+
190	+ foreach ( $sites_plugins as $blog_id => $site_plugins ) {
191	+ // if an activated plugin has been updated clear site cache
192	+ if ( ! empty( array_intersect( $updated_plugins, (array) $site_plugins ) ) ) {
193	+ self::clear_site_cache_by_blog_id( $blog_id );
194	+ }
195	+ }
196	}
197	}
198	}

203	* Cache Enabler update actions
204	*
205	* @since 1.4.0
206	+ * @change 1.7.0
207	*/
208
209	+ public static function on_cache_enabler_update() {
210
211	// clean system files
212	self::each_site( is_multisite(), 'Cache_Enabler_Disk::clean' );

256	* install on new site in multisite network
257	*
258	* @since 1.0.0
259	+ * @change 1.7.0
260	*
261	* @param WP_Site $new_site new site instance
262	*/

264	public static function install_later( $new_site ) {
265
266	// check if network activated
267	+ if ( ! is_plugin_active_for_network( CACHE_ENABLER_BASE ) ) {
268	return;
269	}
270

283	* add or update backend requirements
284	*
285	* @since 1.5.0
286	+ * @change 1.7.0
287	*
288	+ * @return array $new_option_value new or current database option value
289	*/
290
291	public static function update_backend() {

312	// merge defined settings into default settings
313	$new_option_value = wp_parse_args( $old_option_value, self::get_default_settings() );
314
315	+ // validate settings
316	+ $new_option_value = self::validate_settings( $new_option_value );
317	+
318	// add or update database option
319	update_option( 'cache_enabler', $new_option_value );
320

382	* enter each site
383	*
384	* @since 1.5.0
385	+ * @change 1.7.0
386	*
387	* @param boolean $network whether or not each site in network
388	* @param string $callback callback function

396
397	if ( $network ) {
398	$blog_ids = self::get_blog_ids();
399	+
400	// switch to each site in network
401	foreach ( $blog_ids as $blog_id ) {
402	switch_to_blog( $blog_id );
403	+ $callback_return[ $blog_id ] = call_user_func_array( $callback, $callback_params );
404	restore_current_blog();
405	}
406	} else {
407	+ $blog_id = 1;
408	+ $callback_return[ $blog_id ] = call_user_func_array( $callback, $callback_params );
409	}
410
411	return $callback_return;

432	* get settings from database
433	*
434	* @since 1.0.0
435	+ * @change 1.7.0
436	*
437	* @return array $settings current settings from database
438	*/

443	$settings = get_option( 'cache_enabler' );
444
445	// if database option does not exist or settings are outdated
446	+ if ( $settings === false \|\| ! isset( $settings['version'] ) \|\| $settings['version'] !== CACHE_ENABLER_VERSION ) {
447	$settings = self::update_backend();
448	}
449

455	* get blog IDs
456	*
457	* @since 1.0.0
458	+ * @change 1.7.0
459	*
460	* @return array $blog_ids blog IDs
461	*/
462
463	private static function get_blog_ids() {
464
465	+ $blog_ids = array( 1 );
466
467	if ( is_multisite() ) {
468	global $wpdb;
469	+
470	+ $blog_ids = array_map( 'absint', $wpdb->get_col( "SELECT blog_id FROM $wpdb->blogs" ) );
471	}
472
473	return $blog_ids;

550
551
552	/**
553	+ * get cache size from database or disk
554	*
555	* @since 1.0.0
556	+ * @change 1.7.0
557	*
558	* @return integer $cache_size cache size in bytes
559	*/

563	$cache_size = get_transient( self::get_cache_size_transient_name() );
564
565	if ( ! $cache_size ) {
566	+ $cache_size = Cache_Enabler_Disk::get_cache_size();
567	set_transient( self::get_cache_size_transient_name(), $cache_size, MINUTE_IN_SECONDS * 15 );
568	}
569

609	* get default settings
610	*
611	* @since 1.0.0
612	+ * @change 1.7.0
613	*
614	* @param string $settings_type default `system` settings
615	* @return array $system_default_settings\|$default_settings only default system settings or all default settings

618	private static function get_default_settings( $settings_type = null ) {
619
620	$system_default_settings = array(
621	+ 'version' => (string) CACHE_ENABLER_VERSION,
622	'permalink_structure' => (string) self::get_permalink_structure(),
623	);
624

632	'clear_site_cache_on_saved_post' => 0,
633	'clear_site_cache_on_saved_comment' => 0,
634	'clear_site_cache_on_changed_plugin' => 0,

635	'convert_image_urls_to_webp' => 0,
636	+ 'mobile_cache' => 0,
637	+ 'compress_cache' => 0,
638	+ 'minify_html' => 0,
639	+ 'minify_inline_css_js' => 0,
640	'excluded_post_ids' => '',
641	'excluded_page_paths' => '',
642	'excluded_query_strings' => '',
643	'excluded_cookies' => '',


644	);
645
646	// merge default settings

688	'update_product_stock' => '', // deprecated
689	'new_comment' => 'clear_site_cache_on_saved_comment',
690	'clear_on_upgrade' => 'clear_site_cache_on_changed_plugin',

691	'webp' => 'convert_image_urls_to_webp',
692	+ 'compress' => 'compress_cache',
693	'excl_ids' => 'excluded_post_ids',
694	'excl_paths' => 'excluded_page_paths',
695	'excl_cookies' => 'excluded_cookies',

709	if ( ! empty( $new_name ) ) {
710	$settings[ $new_name ] = $settings[ $old_name ];
711	}
712	+
713	unset( $settings[ $old_name ] );
714	}
715	}

722	* add plugin action links in the plugins list table
723	*
724	* @since 1.0.0
725	+ * @change 1.7.0
726	*
727	* @param array $action_links action links
728	* @return array $action_links updated action links if applicable, unchanged otherwise

735	return $action_links;
736	}
737
738	+ // prepend action link
739	+ array_unshift( $action_links, sprintf(
740	+ '<a href="%s">%s</a>',
741	+ admin_url( 'options-general.php?page=cache-enabler' ),
742	+ esc_html__( 'Settings', 'cache-enabler' )
743	+ ) );





744
745	return $action_links;
746	}

750	* add plugin metadata in the plugins list table
751	*
752	* @since 1.0.0
753	+ * @change 1.7.0
754	*
755	* @param array $plugin_meta plugin metadata, including the version, author, author URI, and plugin URI
756	* @param string $plugin_file path to the plugin file relative to the plugins directory

760	public static function add_plugin_row_meta( $plugin_meta, $plugin_file ) {
761
762	// check if Cache Enabler row
763	+ if ( $plugin_file !== CACHE_ENABLER_BASE ) {
764	return $plugin_meta;
765	}
766

817	* @since 1.0.0
818	* @change 1.6.0
819	*
820	+ * @param object $wp_admin_bar menu properties
821	*/
822
823	public static function add_admin_bar_items( $wp_admin_bar ) {

866	* enqueue styles and scripts
867	*
868	* @since 1.0.0
869	+ * @change 1.7.0
870	*/
871
872	public static function add_admin_resources( $hook ) {
873
874	// settings page
875	if ( $hook === 'settings_page_cache-enabler' ) {
876	+ wp_enqueue_style( 'cache-enabler-settings', plugins_url( 'css/settings.min.css', CACHE_ENABLER_FILE ), array(), CACHE_ENABLER_VERSION );
877	}
878	}
879

924	* process clear cache request
925	*
926	* @since 1.0.0
927	+ * @change 1.7.0
928	*/
929
930	public static function process_clear_cache_request() {

946
947	// clear page cache
948	if ( $_GET['_action'] === 'clearurl' ) {
949	+ $clear_url = parse_url( home_url(), PHP_URL_SCHEME ) . '://' . Cache_Enabler_Engine::$request_headers['Host'] . $_SERVER['REQUEST_URI'];

950	self::clear_page_cache_by_url( $clear_url );
951	// clear site(s) cache
952	} elseif ( $_GET['_action'] === 'clear' ) {

954	}
955
956	// redirect to same page
957	+ wp_safe_redirect( remove_query_arg( array( '_cache', '_action', '_wpnonce' ) ) );
958
959	// set transient for clear notice
960	if ( is_admin() ) {

970	* admin notice after cache has been cleared
971	*
972	* @since 1.0.0
973	+ * @change 1.7.0
974	*/
975
976	public static function cache_cleared_notice() {

981	}
982
983	if ( get_transient( self::get_cache_cleared_transient_name() ) ) {
984	+ printf(
985	'<div class="notice notice-success is-dismissible"><p><strong>%s</strong></p></div>',
986	( is_multisite() && is_network_admin() ) ? esc_html__( 'Network cache cleared.', 'cache-enabler' ) : esc_html__( 'Site cache cleared.', 'cache-enabler' )
987	);

992
993
994	/**
995	+ * save or trash post hook
996	*
997	* @since 1.5.0
998	+ * @change 1.7.0
999	*
1000	* @param integer $post_id post ID
1001	*/
1002
1003	+ public static function on_save_trash_post( $post_id ) {


















1004
1005	+ $post_status = get_post_status( $post_id );
1006
1007	+ // if any published post type has been created, updated, or about to be trashed
1008	+ if ( $post_status === 'publish' ) {
1009	+ self::clear_cache_on_post_save( $post_id );



1010	}
1011	}
1012
1013
1014	/**
1015	+ * pre post update hook
1016	*
1017	+ * @since 1.7.0
1018	+ * @change 1.7.0
1019	*
1020	+ * @param integer $post_id post ID
1021	+ * @param array $post_data unslashed post data
1022	*/
1023
1024	+ public static function on_pre_post_update( $post_id, $post_data ) {



















1025
1026	+ $old_post_status = get_post_status( $post_id );
1027	+ $new_post_status = $post_data['post_status'];
1028
1029	+ // if any published post type is about to be updated but not trashed
1030	+ if ( $old_post_status === 'publish' && $new_post_status !== 'trash' ) {
1031	+ self::clear_cache_on_post_save( $post_id );
1032	}
1033	}
1034

1216	// get post type archives URL
1217	$post_type_archives_url = get_post_type_archive_link( $post_type );
1218
1219	+ // if post type archives URL exists clear post type archives page and its pagination page(s) cache
1220	if ( ! empty( $post_type_archives_url ) ) {

1221	self::clear_page_cache_by_url( $post_type_archives_url, 'pagination' );
1222	}
1223	}

1227	* clear taxonomies archives pages cache by post ID
1228	*
1229	* @since 1.5.0
1230	+ * @change 1.7.0
1231	*
1232	* @param integer $post_id post ID
1233	*/

1241	if ( wp_count_terms( $taxonomy ) > 0 ) {
1242	// get terms attached to post
1243	$term_ids = wp_get_post_terms( $post_id, $taxonomy, array( 'fields' => 'ids' ) );
1244	+
1245	foreach ( $term_ids as $term_id ) {
1246	+ // get term archives URL
1247	$term_archives_url = get_term_link( (int) $term_id, $taxonomy );
1248	+
1249	+ // if term archives URL exists and does not have a query string clear taxonomy archives page and its pagination page(s) cache
1250	+ if ( ! is_wp_error( $term_archives_url ) && strpos( $term_archives_url, '?' ) === false ) {
1251	self::clear_page_cache_by_url( $term_archives_url, 'pagination' );
1252	}
1253	}

1309	* clear page cache by post ID
1310	*
1311	* @since 1.0.0
1312	+ * @change 1.7.0
1313	*
1314	* @param integer\|string $post_id post ID
1315	* @param string $clear_type clear the `pagination` cache or all `subpages` cache instead of only the `page` cache

1318	public static function clear_page_cache_by_post_id( $post_id, $clear_type = 'page' ) {
1319
1320	// validate integer
1321	+ $post_id = (int) $post_id;







1322
1323	+ // get page URL
1324	+ $page_url = ( $post_id ) ? get_permalink( $post_id ) : '';
1325	+
1326	+ // if page URL exists and does not have a query string (e.g. guid) clear page cache
1327	+ if ( ! empty( $page_url ) && strpos( $page_url, '?' ) === false ) {
1328	+ self::clear_page_cache_by_url( $page_url, $clear_type );
1329	+ }
1330	}
1331
1332

1350	* clear site cache by blog ID
1351	*
1352	* @since 1.4.0
1353	+ * @change 1.7.0
1354	*
1355	* @param integer\|string $blog_id blog ID
1356	* @param boolean $delete_cache_size_transient whether or not the cache size transient should be deleted

1359	public static function clear_site_cache_by_blog_id( $blog_id, $delete_cache_size_transient = true ) {
1360
1361	// validate integer
1362	+ $blog_id = (int) $blog_id;







1363
1364	// check if blog ID exists
1365	+ if ( ! in_array( $blog_id, self::get_blog_ids(), true ) ) {
1366	return;
1367	}
1368

1401
1402
1403	/**
1404	+ * clear cache when any post type has been created, updated, or trashed
1405	*
1406	* @since 1.5.0
1407	+ * @change 1.7.0
1408	*
1409	+ * @param integer\|WP_Post $post post ID or post instance

1410	*/
1411
1412	+ public static function clear_cache_on_post_save( $post ) {
1413	+
1414	+ if ( is_int( $post ) ) {
1415	+ $post_id = $post;
1416	+ $post = get_post( $post_id );
1417
1418	+ if ( ! is_object( $post ) ) {
1419	+ return;
1420	+ }
1421	+ } elseif ( is_object( $post ) ) {
1422	+ $post_id = $post->ID;
1423	+ }
1424
1425	// if setting enabled clear site cache
1426	if ( Cache_Enabler_Engine::$settings['clear_site_cache_on_saved_post'] ) {
1427	self::clear_site_cache();
1428	// clear page and/or associated cache otherwise
1429	} else {
1430	+ self::clear_page_cache_by_post_id( $post_id );





1431	self::clear_associated_cache( $post );
1432	}
1433	}

1437	* check plugin requirements
1438	*
1439	* @since 1.1.0
1440	+ * @change 1.7.0
1441	*/
1442
1443	public static function requirements_check() {

1448	}
1449
1450	// check PHP version
1451	+ if ( version_compare( PHP_VERSION, CACHE_ENABLER_MIN_PHP, '<' ) ) {
1452	+ printf(
1453	'<div class="notice notice-error"><p>%s</p></div>',
1454	sprintf(
1455	// translators: 1. Cache Enabler 2. PHP version (e.g. 5.6)
1456	esc_html__( '%1$s requires PHP %2$s or higher to function properly. Please update PHP or disable the plugin.', 'cache-enabler' ),
1457	'<strong>Cache Enabler</strong>',
1458	+ CACHE_ENABLER_MIN_PHP
1459	)
1460	);
1461	}
1462
1463	// check WordPress version
1464	+ if ( version_compare( $GLOBALS['wp_version'], CACHE_ENABLER_MIN_WP . 'alpha', '<' ) ) {
1465	+ printf(
1466	'<div class="notice notice-error"><p>%s</p></div>',
1467	sprintf(
1468	// translators: 1. Cache Enabler 2. WordPress version (e.g. 5.1)
1469	esc_html__( '%1$s requires WordPress %2$s or higher to function properly. Please update WordPress or disable the plugin.', 'cache-enabler' ),
1470	'<strong>Cache Enabler</strong>',
1471	+ CACHE_ENABLER_MIN_WP
1472	)
1473	);
1474	}
1475
1476	// check advanced-cache.php drop-in
1477	if ( ! file_exists( WP_CONTENT_DIR . '/advanced-cache.php' ) ) {
1478	+ printf(
1479	'<div class="notice notice-warning"><p>%s</p></div>',
1480	sprintf(
1481	// translators: 1. Cache Enabler 2. advanced-cache.php 3. wp-content/plugins/cache-enabler 4. wp-content

1490
1491	// check permalink structure
1492	if ( Cache_Enabler_Engine::$settings['permalink_structure'] === 'plain' && current_user_can( 'manage_options' ) ) {
1493	+ printf(
1494	'<div class="notice notice-warning"><p>%s</p></div>',
1495	sprintf(
1496	// translators: 1. Cache Enabler 2. Permalink Settings

1507
1508	// check file permissions
1509	if ( file_exists( dirname( Cache_Enabler_Disk::$cache_dir ) ) && ! is_writable( dirname( Cache_Enabler_Disk::$cache_dir ) ) ) {
1510	+ printf(
1511	'<div class="notice notice-warning"><p>%s</p></div>',
1512	sprintf(
1513	// translators: 1. Cache Enabler 2. 755 3. wp-content/cache 4. file permissions

1526
1527	// check Autoptimize HTML optimization
1528	if ( defined( 'AUTOPTIMIZE_PLUGIN_DIR' ) && Cache_Enabler_Engine::$settings['minify_html'] && get_option( 'autoptimize_html', '' ) !== '' ) {
1529	+ printf(
1530	'<div class="notice notice-warning"><p>%s</p></div>',
1531	sprintf(
1532	// translators: 1. Autoptimize 2. Cache Enabler Settings

1604	* validate settings
1605	*
1606	* @since 1.0.0
1607	+ * @change 1.7.0
1608	*
1609	* @param array $settings user defined settings
1610	* @return array $validated_settings validated settings

1612
1613	public static function validate_settings( $settings ) {
1614





1615	$validated_settings = array(
1616	'cache_expires' => (int) ( ! empty( $settings['cache_expires'] ) ),
1617	+ 'cache_expiry_time' => (int) $settings['cache_expiry_time'],
1618	'clear_site_cache_on_saved_post' => (int) ( ! empty( $settings['clear_site_cache_on_saved_post'] ) ),
1619	'clear_site_cache_on_saved_comment' => (int) ( ! empty( $settings['clear_site_cache_on_saved_comment'] ) ),
1620	'clear_site_cache_on_changed_plugin' => (int) ( ! empty( $settings['clear_site_cache_on_changed_plugin'] ) ),

1621	'convert_image_urls_to_webp' => (int) ( ! empty( $settings['convert_image_urls_to_webp'] ) ),
1622	+ 'mobile_cache' => (int) ( ! empty( $settings['mobile_cache'] ) ),
1623	+ 'compress_cache' => (int) ( ! empty( $settings['compress_cache'] ) ),


1624	'minify_html' => (int) ( ! empty( $settings['minify_html'] ) ),
1625	'minify_inline_css_js' => (int) ( ! empty( $settings['minify_inline_css_js'] ) ),
1626	+ 'excluded_post_ids' => (string) sanitize_text_field( $settings['excluded_post_ids'] ),
1627	+ 'excluded_page_paths' => (string) self::validate_regex( $settings['excluded_page_paths'] ),
1628	+ 'excluded_query_strings' => (string) self::validate_regex( $settings['excluded_query_strings'] ),
1629	+ 'excluded_cookies' => (string) self::validate_regex( $settings['excluded_cookies'] ),
1630	);
1631
1632	// add default system settings

1646	* settings page
1647	*
1648	* @since 1.0.0
1649	+ * @change 1.7.0
1650	*/
1651
1652	public static function settings_page() {

1654	?>
1655
1656	<div id="cache_enabler_settings" class="wrap">
1657	+ <h1><?php esc_html_e( 'Cache Enabler Settings', 'cache-enabler' ); ?></h1>


1658
1659	<?php
1660	if ( defined( 'WP_CACHE' ) && ! WP_CACHE ) {

1674
1675	<div class="notice notice-info">
1676	<p>
1677	+ <?php
1678	+ printf(
1679	+ // translators: %s: KeyCDN
1680	+ esc_html__( 'Combine Cache Enabler with %s for even better WordPress performance and achieve the next level of caching with a CDN.', 'cache-enabler' ),
1681	+ '<strong><a href="https://www.keycdn.com?utm_source=wp-admin&utm_medium=plugins&utm_campaign=cache-enabler" target="_blank" rel="nofollow noopener">KeyCDN</a></strong>'
1682	+ );
1683	+ ?>
1684	</p>
1685	</div>
1686

1694	<td>
1695	<fieldset>
1696	<p class="subheading"><?php esc_html_e( 'Expiration', 'cache-enabler' ); ?></p>
1697	+ <label for="cache_enabler_cache_expires" class="checkbox--form-control">
1698	+ <input name="cache_enabler[cache_expires]" type="checkbox" id="cache_enabler_cache_expires" value="1" <?php checked( '1', Cache_Enabler_Engine::$settings['cache_expires'] ); ?> />
1699	</label>
1700	+ <label for="cache_enabler_cache_expiry_time">
1701	<?php
1702	printf(
1703	+ // translators: %s: Form field input for number of hours.
1704	esc_html__( 'Cached pages expire %s hours after being created.', 'cache-enabler' ),
1705	+ '<input name="cache_enabler[cache_expiry_time]" type="number" id="cache_enabler_cache_expiry_time" value="' . Cache_Enabler_Engine::$settings['cache_expiry_time'] . '" class="small-text">'
1706	);
1707	?>
1708	</label>

1710	<br />
1711
1712	<p class="subheading"><?php esc_html_e( 'Clearing', 'cache-enabler' ); ?></p>
1713	+ <label for="cache_enabler_clear_site_cache_on_saved_post">
1714	+ <input name="cache_enabler[clear_site_cache_on_saved_post]" type="checkbox" id="cache_enabler_clear_site_cache_on_saved_post" value="1" <?php checked( '1', Cache_Enabler_Engine::$settings['clear_site_cache_on_saved_post'] ); ?> />
1715	<?php esc_html_e( 'Clear the site cache if any post type has been published, updated, or trashed (instead of only the page and/or associated cache).', 'cache-enabler' ); ?>
1716	</label>
1717
1718	<br />
1719
1720	+ <label for="cache_enabler_clear_site_cache_on_saved_comment">
1721	+ <input name="cache_enabler[clear_site_cache_on_saved_comment]" type="checkbox" id="cache_enabler_clear_site_cache_on_saved_comment" value="1" <?php checked( '1', Cache_Enabler_Engine::$settings['clear_site_cache_on_saved_comment'] ); ?> />
1722	<?php esc_html_e( 'Clear the site cache if a comment has been posted, updated, spammed, or trashed (instead of only the page cache).', 'cache-enabler' ); ?>
1723	</label>
1724
1725	<br />
1726
1727	+ <label for="cache_enabler_clear_site_cache_on_changed_plugin">
1728	+ <input name="cache_enabler[clear_site_cache_on_changed_plugin]" type="checkbox" id="cache_enabler_clear_site_cache_on_changed_plugin" value="1" <?php checked( '1', Cache_Enabler_Engine::$settings['clear_site_cache_on_changed_plugin'] ); ?> />
1729	+ <?php esc_html_e( 'Clear the site cache if a plugin has been activated or deactivated.', 'cache-enabler' ); ?>
1730	</label>
1731
1732	<br />
1733
1734	<p class="subheading"><?php esc_html_e( 'Variants', 'cache-enabler' ); ?></p>
1735	+ <label for="cache_enabler_convert_image_urls_to_webp">
1736	+ <input name="cache_enabler[convert_image_urls_to_webp]" type="checkbox" id="cache_enabler_convert_image_urls_to_webp" value="1" <?php checked( '1', Cache_Enabler_Engine::$settings['convert_image_urls_to_webp'] ); ?> />
1737	<?php
1738	printf(
1739	// translators: %s: Optimus

1745
1746	<br />
1747
1748	+ <label for="cache_enabler_mobile_cache">
1749	+ <input name="cache_enabler[mobile_cache]" type="checkbox" id="cache_enabler_mobile_cache" value="1" <?php checked( '1', Cache_Enabler_Engine::$settings['mobile_cache'] ); ?> />
1750	+ <?php esc_html_e( 'Create an additional cached version for mobile devices.', 'cache-enabler' ); ?>
1751	+ </label>
1752	+
1753	+ <br />
1754	+
1755	+ <label for="cache_enabler_compress_cache">
1756	+ <input name="cache_enabler[compress_cache]" type="checkbox" id="cache_enabler_compress_cache" value="1" <?php checked( '1', Cache_Enabler_Engine::$settings['compress_cache'] ); ?> />
1757	<?php esc_html_e( 'Pre-compress cached pages with Gzip.', 'cache-enabler' ); ?>
1758	</label>
1759
1760	<br />
1761
1762	<p class="subheading"><?php esc_html_e( 'Minification', 'cache-enabler' ); ?></p>
1763	+ <label for="cache_enabler_minify_html" class="checkbox--form-control">
1764	+ <input name="cache_enabler[minify_html]" type="checkbox" id="cache_enabler_minify_html" value="1" <?php checked( '1', Cache_Enabler_Engine::$settings['minify_html'] ); ?> />
1765	</label>
1766	+ <label for="cache_enabler_minify_inline_css_js">
1767	<?php
1768	$minify_inline_css_js_options = array(
1769	esc_html__( 'excluding', 'cache-enabler' ) => 0,
1770	esc_html__( 'including', 'cache-enabler' ) => 1,
1771	);
1772	+ $minify_inline_css_js = '<select name="cache_enabler[minify_inline_css_js]" id="cache_enabler_minify_inline_css_js">';
1773	foreach ( $minify_inline_css_js_options as $key => $value ) {
1774	$minify_inline_css_js .= '<option value="' . esc_attr( $value ) . '"' . selected( $value, Cache_Enabler_Engine::$settings['minify_inline_css_js'], false ) . '>' . $key . '</option>';
1775	}

1792	<td>
1793	<fieldset>
1794	<p class="subheading"><?php esc_html_e( 'Post IDs', 'cache-enabler' ); ?></p>
1795	+ <label for="cache_enabler_excluded_post_ids">
1796	+ <input name="cache_enabler[excluded_post_ids]" type="text" id="cache_enabler_excluded_post_ids" value="<?php echo esc_attr( Cache_Enabler_Engine::$settings['excluded_post_ids'] ) ?>" class="regular-text" />
1797	<p class="description">
1798	+ <?php
1799	+ // translators: %s: ,
1800	+ printf(
1801	+ esc_html__( 'Post IDs separated by a %s that should bypass the cache.', 'cache-enabler' ),
1802	+ '<code class="code--form-control">,</code>'
1803	+ );
1804	+ ?>
1805	</p>
1806	<p><?php esc_html_e( 'Example:', 'cache-enabler' ); ?> <code class="code--form-control">2,43,65</code></p>
1807	</label>

1809	<br />
1810
1811	<p class="subheading"><?php esc_html_e( 'Page Paths', 'cache-enabler' ); ?></p>
1812	+ <label for="cache_enabler_excluded_page_paths">
1813	+ <input name="cache_enabler[excluded_page_paths]" type="text" id="cache_enabler_excluded_page_paths" value="<?php echo esc_attr( Cache_Enabler_Engine::$settings['excluded_page_paths'] ) ?>" class="regular-text code" />
1814	<p class="description"><?php esc_html_e( 'A regex matching page paths that should bypass the cache.', 'cache-enabler' ); ?></p>
1815	<p><?php esc_html_e( 'Example:', 'cache-enabler' ); ?> <code class="code--form-control">/^(\/\|\/forums\/)$/</code></p>
1816	</label>

1818	<br />
1819
1820	<p class="subheading"><?php esc_html_e( 'Query Strings', 'cache-enabler' ); ?></p>
1821	+ <label for="cache_enabler_excluded_query_strings">
1822	+ <input name="cache_enabler[excluded_query_strings]" type="text" id="cache_enabler_excluded_query_strings" value="<?php echo esc_attr( Cache_Enabler_Engine::$settings['excluded_query_strings'] ) ?>" class="regular-text code" />
1823	<p class="description"><?php esc_html_e( 'A regex matching query strings that should bypass the cache.', 'cache-enabler' ); ?></p>
1824	<p><?php esc_html_e( 'Example:', 'cache-enabler' ); ?> <code class="code--form-control">/^nocache$/</code></p>
1825	<p><?php esc_html_e( 'Default if unset:', 'cache-enabler' ); ?> <code class="code--form-control">/^(?!(fbclid\|ref\|mc_(cid\|eid)\|utm_(source\|medium\|campaign\|term\|content\|expid)\|gclid\|fb_(action_ids\|action_types\|source)\|age-verified\|usqp\|cn-reloaded\|_ga\|_ke)).+$/</code></p>

1828	<br />
1829
1830	<p class="subheading"><?php esc_html_e( 'Cookies', 'cache-enabler' ); ?></p>
1831	+ <label for="cache_enabler_excluded_cookies">
1832	+ <input name="cache_enabler[excluded_cookies]" type="text" id="cache_enabler_excluded_cookies" value="<?php echo esc_attr( Cache_Enabler_Engine::$settings['excluded_cookies'] ) ?>" class="regular-text code" />
1833	<p class="description"><?php esc_html_e( 'A regex matching cookies that should bypass the cache.', 'cache-enabler' ); ?></p>
1834	<p><?php esc_html_e( 'Example:', 'cache-enabler' ); ?> <code class="code--form-control">/^(comment_author\|woocommerce_items_in_cart\|wp_woocommerce_session)_?/</code></p>
1835	<p><?php esc_html_e( 'Default if unset:', 'cache-enabler' ); ?> <code class="code--form-control">/^(wp-postpass\|wordpress_logged_in\|comment_author)_/</code></p>

1840	</table>
1841
1842	<p class="submit">
1843	+ <input type="submit" class="button-secondary" value="<?php esc_html_e( 'Save Changes', 'cache-enabler' ); ?>" />
1844	+ <input name="cache_enabler[clear_site_cache_on_saved_settings]" type="submit" class="button-primary" value="<?php esc_html_e( 'Save Changes and Clear Site Cache', 'cache-enabler' ); ?>" />
1845	</p>
1846	</form>
1847	</div>

inc/cache_enabler_disk.class.php CHANGED Viewed

	@@ -47,32 +47,17 @@ final class Cache_Enabler_Disk {
47	private static $dir_cleared = array();
48
49
50	- /**
51	- * base cache file names
52	- *
53	- * @since 1.0.7
54	- * @change 1.6.0
55	- *
56	- * @var string
57	- */
58	-
59	- const CACHE_FILE_HTML = 'index.html';
60	- const CACHE_FILE_GZIP = 'index.html.gz';
61	- const CACHE_FILE_WEBP_HTML = 'index-webp.html';
62	- const CACHE_FILE_WEBP_GZIP = 'index-webp.html.gz';
63	-
64	-
65	/**
66	* configure system files
67	*
68	* @since 1.5.0
69	- * @change 1.5.0
70	*/
71
72	public static function setup() {
73
74	// add advanced-cache.php drop-in
75	- copy( ~~CE_DIR~~ . '/advanced-cache.php', WP_CONTENT_DIR . '/advanced-cache.php' );
76
77	// set WP_CACHE constant in config file if not already set
78	self::set_wp_cache_constant();
	@@ -106,23 +91,24 @@ final class Cache_Enabler_Disk {
106
107
108	/**
109	- * store cached page~~(s)~~
110	*
111	* @since 1.0.0
112	- * @change 1.5.0
113	*
114	* @param string $page_contents contents of a page from the output buffer
115	*/
116
117	public static function cache_page( $page_contents ) {
118
119	- // ~~check~~ if ~~page~~ is ~~empty~~
120	- if ( ~~empty~~( $page_contents ) ~~) {~~
121	- return;
122	- }
123
124	- // ~~create~~ ~~cached~~ ~~page(s)~~
125	- ~~self::create_cache_files~~( $page_contents );



126	}
127
128
	@@ -130,14 +116,15 @@ final class Cache_Enabler_Disk {
130	* check if cached page exists
131	*
132	* @since 1.0.0
133	- * @change 1.0.0
134	*
135	- * @~~return~~ ~~boolean true~~ if cached page ~~exists, false otherwise~~

136	*/
137
138	- public static function cache_exists() {
139
140	- return is_readable( ~~self::cache_file_html()~~ );
141	}
142
143
	@@ -145,12 +132,13 @@ final class Cache_Enabler_Disk {
145	* check if cached page expired
146	*
147	* @since 1.0.1
148	- * @change 1.5.1
149	*
150	- * @~~return~~ ~~boolean true~~ if cached page ~~expired, false otherwise~~

151	*/
152
153	- public static function cache_expired() {
154
155	// check if cached pages are set to expire
156	if ( ! Cache_Enabler_Engine::$settings['cache_expires'] \|\| Cache_Enabler_Engine::$settings['cache_expiry_time'] === 0 ) {
	@@ -161,7 +149,7 @@ final class Cache_Enabler_Disk {
161	$expires_seconds = 60 * 60 * Cache_Enabler_Engine::$settings['cache_expiry_time'];
162
163	// check if cached page has expired
164	- if ( ( filemtime( ~~self::cache_file_html()~~ ) + $expires_seconds ) <= $now ) {
165	return true;
166	}
167
	@@ -169,72 +157,11 @@ final class Cache_Enabler_Disk {
169	}
170
171
172	- /**
173	- * create signature
174	- *
175	- * @since 1.0.0
176	- * @change 1.5.0
177	- *
178	- * @return string signature
179	- */
180	-
181	- private static function cache_signature() {
182	-
183	- return sprintf(
184	- '<!-- %s @ %s',
185	- 'Cache Enabler by KeyCDN',
186	- date_i18n( 'd.m.Y H:i:s', current_time( 'timestamp' ) )
187	- );
188	- }
189	-
190	-
191	- /**
192	- * get cache size
193	- *
194	- * @since 1.0.0
195	- * @change 1.6.0
196	- *
197	- * @param string $dir directory path
198	- * @return integer $cache_size cache size in bytes
199	- */
200	-
201	- public static function cache_size( $dir = null ) {
202	-
203	- $cache_size = 0;
204	-
205	- // get directory objects if provided directory exists
206	- if ( is_dir( $dir ) ) {
207	- $dir_objects = self::get_dir_objects( $dir );
208	- // get site objects otherwise
209	- } else {
210	- $dir_objects = self::get_site_objects( home_url() );
211	- }
212	-
213	- // check if directory is empty
214	- if ( empty( $dir_objects ) ) {
215	- return $cache_size;
216	- }
217	-
218	- foreach ( $dir_objects as $dir_object ) {
219	- // get full path
220	- $dir_object = trailingslashit( ( $dir ) ? $dir : ( self::$cache_dir . '/' . parse_url( home_url(), PHP_URL_HOST ) . parse_url( home_url(), PHP_URL_PATH ) ) ) . $dir_object;
221	-
222	- if ( is_dir( $dir_object ) ) {
223	- $cache_size += self::cache_size( $dir_object );
224	- } elseif ( is_file( $dir_object ) ) {
225	- $cache_size += filesize( $dir_object );
226	- }
227	- }
228	-
229	- return $cache_size;
230	- }
231	-
232	-
233	/**
234	* clear cached page(s)
235	*
236	* @since 1.0.0
237	- * @change 1.6.0
238	*
239	* @param string $clear_url full URL to potentially cached page
240	* @param string $clear_type clear the `pagination` cache or all `subpages` cache instead of only the `page` cache
	@@ -248,17 +175,13 @@ final class Cache_Enabler_Disk {
248	}
249
250	// get directory
251	- $dir = self::~~cache_file_dir_path~~( $clear_url );
252
253	// check if directory exists
254	if ( ! is_dir( $dir ) ) {
255	return;
256	}
257
258	- if ( $clear_type === 'dir' ) {
259	- $clear_type = 'subpages';
260	- }
261	-
262	// check if page and subpages cache should be cleared
263	if ( $clear_type === 'subpages' ) {
264	self::clear_dir( $dir );
	@@ -270,7 +193,7 @@ final class Cache_Enabler_Disk {
270	if ( $clear_type === 'pagination' ) {
271	$pagination_base = $GLOBALS['wp_rewrite']->pagination_base;
272	if ( strlen( $pagination_base ) > 0 ) {
273	- $pagination_dir = $dir . $pagination_base;
274	self::clear_dir( $pagination_dir );
275	}
276	}
	@@ -298,7 +221,7 @@ final class Cache_Enabler_Disk {
298	}
299
300	// site cache cleared hook
301	- if ( $dir === ~~untrailingslashit(~~ self::~~cache_file_dir_path~~( home_url() ) ) ) {
302	$site_cleared_url = home_url();
303	$site_cleared_id = get_current_blog_id();
304	do_action( 'cache_enabler_site_cache_cleared', $site_cleared_url, $site_cleared_id );
	@@ -317,13 +240,13 @@ final class Cache_Enabler_Disk {
317	* @since 1.0.0
318	* @change 1.6.0
319	*
320	- * @param string $dir directory path
321	* @param boolean $skip_child_dir whether or not child directories should be skipped
322	*/
323
324	private static function clear_dir( $dir, $skip_child_dir = false ) {
325
326	- // remove trailing slash
327	$dir = untrailingslashit( $dir );
328
329	// check if directory exists
	@@ -358,99 +281,65 @@ final class Cache_Enabler_Disk {
358
359
360	/**
361	- * create ~~files~~ for cache
362	*
363	* @since 1.0.0
364	- * @change 1.6.1
365	*
366	* @param string $page_contents contents of a page from the output buffer
367	*/
368
369	- private static function ~~create_cache_files~~( $page_contents ) {
370	-
371	- // get base signature
372	- $cache_signature = self::cache_signature();
373
374	- // ~~make~~ ~~directory~~ if ~~necessary~~
375	- if ( ! ~~wp_mkdir_p~~( ~~self::cache_file_dir_path(~~) ) ) {
376	- ~~wp_die( 'Unable to create directory.' )~~;
377	}
378
379	- // ~~minify~~ ~~HTML~~
380	- $~~page_contents~~ = self::~~minify_html~~( ~~$page_contents~~ );
381	-
382	- // ~~create~~ ~~default~~ ~~file~~
383	- self::create_cache_file( self::cache_file_html(), $page_contents . $cache_signature . ' (' . self::cache_file_scheme() . ' html) -->' );
384
385	- // ~~create~~ ~~pre-compressed~~ ~~file~~
386	- if ( Cache_Enabler_Engine::$settings['~~compress_cache~~'] ) {
387	- $~~compressed_page_contents~~ = ~~gzencode~~( $page_contents ~~. $cache_signature . ' (' . self::cache_file_scheme(~~) ~~. ' gzip) -->', 9 )~~;
388	- // validate compression
389	- if ( is_string( $compressed_page_contents ) ) {
390	- self::create_cache_file( self::cache_file_gzip(), $compressed_page_contents );
391	- }
392	}
393
394	- // ~~create~~ ~~WebP~~ ~~supported files~~
395	- if ( ~~Cache_Enabler_Engine::$settings['convert_image_urls_to_webp']~~ ) {
396	- // attributes to convert during WebP conversion hook
397	- $attributes = (array) apply_filters( 'cache_enabler_convert_webp_attributes', array( 'src', 'srcset', 'data-[^=]+' ) );
398	-
399	- // stringify
400	- $attributes_regex = implode( '\|', $attributes );
401	-
402	- // magic regex rule
403	- $image_urls_regex = '#(?:(?:(' . $attributes_regex . ')\s=\|(url)$)\s[\'\"]?\s)\K(?:[^\?\"\'\s>]+)(?:\.jpe?g\|\.png)(?:\s\d+[wx][^\"\'>])?(?=\/?[\"\'\s$>])(?=[^<{](?:\)[^<{]\}\|>))#i';
404	-
405	- // ignore query strings during WebP conversion hook
406	- if ( ! apply_filters( 'cache_enabler_convert_webp_ignore_query_strings', true ) ) {
407	- $image_urls_regex = '#(?:(?:(' . $attributes_regex . ')\s=\|(url)$)\s[\'\"]?\s)\K(?:[^\"\'\s>]+)(?:\.jpe?g\|\.png)(?:\s\d+[wx][^\"\'>])?(?=\/?[\?\"\'\s$>])(?=[^<{](?:\)[^<{]\}\|>))#i';
408	- }
409	-
410	- // page contents after WebP conversion hook
411	- $converted_page_contents = apply_filters( 'cache_enabler_page_contents_after_webp_conversion', preg_replace_callback( $image_urls_regex, 'self::convert_webp', $page_contents ) );
412
413	- // ~~deprecated~~ ~~page~~ ~~contents~~ ~~after~~ WebP ~~conversion~~ ~~hook~~
414	- ~~$converted_page_contents~~ ~~= apply_filters_deprecated~~( ~~'cache_enabler_disk_webp_converted_data', array~~( $~~converted_page_contents )~~, '~~1.6.0~~', ~~'cache_enabler_page_contents_after_webp_conversion'~~ );


415
416	- // ~~create~~ ~~default~~ ~~WebP~~ ~~file~~
417	- ~~self::create_cache_file~~( ~~self::cache_file_webp_html~~(), $~~converted_page_contents~~ ~~. $cache_signature .~~ ' (' ~~. self::cache_file_scheme(~~) . ' ~~webp html~~) ~~-->' );~~

418
419	- // ~~create~~ ~~pre-compressed~~ ~~file~~
420	- if ( ~~Cache_Enabler_Engine::$settings['compress_cache']~~ ) {
421	- ~~$compressed_converted_page_contents = gzencode( $converted_page_contents . $cache_signature . ' (' . self::cache_file_scheme() . ' webp gzip) -->', 9 )~~;
422	- // validate compression
423	- if ( is_string( $compressed_converted_page_contents ) ) {
424	- self::create_cache_file( self::cache_file_webp_gzip(), $compressed_converted_page_contents );
425	- }
426	}
427	}
428	- }
429	-
430	-
431	- /**
432	- * create file for cache
433	- *
434	- * @since 1.0.0
435	- * @change 1.5.0
436	- *
437	- * @param string $file_path file path
438	- * @param string $page_contents contents of a page from the output buffer
439	- */
440
441	- ~~private~~ ~~static~~ ~~function~~ ~~create_cache_file(~~ ~~$file_path, $page_contents ) {~~



442
443	- // ~~write~~ ~~page~~ ~~contents~~ ~~from output buffer to~~ file
444	- file_put_contents( $~~file_path~~, $page_contents );
445
446	// clear file status cache
447	clearstatcache();
448
449	- // set permissions
450	- $~~file_stats~~ = @stat( ~~dirname(~~ $~~file_path~~ ) );
451	- $~~permissions~~ = $~~file_stats~~['mode'] & 0007777;
452	- $~~permissions~~ = $~~permissions~~ & 0000666;
453	- @chmod( $~~file_path~~, $~~permissions~~ );
454
455	// clear file status cache
456	clearstatcache();
	@@ -461,32 +350,22 @@ final class Cache_Enabler_Disk {
461	* create settings file
462	*
463	* @since 1.2.3
464	- * @change 1.6.0
465	*
466	* @param array $settings settings from database
467	- * @return string $new_settings_file new settings file
468	*/
469
470	public static function create_settings_file( $settings ) {
471
472	- // validate array
473	- if ( ! is_array( $settings ) ) {
474	- return;
475	- }
476	-
477	// check settings file requirements
478	- if ( ! function_exists( 'home_url' ) ) {
479	return;
480	}
481
482	// get new settings file
483	$new_settings_file = self::get_settings_file();
484
485	- // make directory if necessary
486	- if ( ! wp_mkdir_p( dirname( $new_settings_file ) ) ) {
487	- wp_die( 'Unable to create directory.' );
488	- }
489	-
490	// add new settings file contents
491	$new_settings_file_contents = '<?php' . PHP_EOL;
492	$new_settings_file_contents .= '/**' . PHP_EOL;
	@@ -495,179 +374,217 @@ final class Cache_Enabler_Disk {
495	$new_settings_file_contents .= ' * @since 1.5.0' . PHP_EOL;
496	$new_settings_file_contents .= ' * @change 1.5.0' . PHP_EOL;
497	$new_settings_file_contents .= ' *' . PHP_EOL;
498	- $new_settings_file_contents .= ' * @generated ' . ~~date_i18n~~( ~~'d.m.Y H:i:s', current_time( 'timestamp'~~ ) ) . PHP_EOL;
499	$new_settings_file_contents .= ' */' . PHP_EOL;
500	$new_settings_file_contents .= PHP_EOL;
501	$new_settings_file_contents .= 'return ' . var_export( $settings, true ) . ';';
502
503	- ~~file_put_contents(~~ ~~$new_settings_file,~~ ~~$new_settings_file_contents~~ );






504
505	return $new_settings_file;
506	}
507
508





















509	/**
510	* get cache file directory path
511	*
512	* @since 1.0.0
513	- * @change 1.6.0
514	*
515	- * @param string $url full URL to potentially cached page
516	- * @return string $~~file_dir_path~~ ~~file~~ directory path to new or potentially cached page
517	*/
518
519	- private static function ~~cache_file_dir_path~~( $url = null ) {
520
521	- $~~file_dir_path~~ = '';
522
523	// validate URL
524	if ( $url && ! filter_var( $url, FILTER_VALIDATE_URL ) ) {
525	- return $~~file_dir_path~~;
526	}
527
528	- $~~file_dir_path~~ = sprintf(
529	'%s/%s%s',
530	self::$cache_dir,
531	- parse_url(
532	- ( $url ) ? $url : ~~'http://' . strtolower(~~ $_SERVER['~~HTTP_HOST~~'] ),
533	- PHP_URL_HOST
534	- ),
535	- parse_url(
536	- ( $url ) ? $url : $_SERVER['REQUEST_URI'],
537	- PHP_URL_PATH
538	- )
539	);
540
541	- // ~~add~~ trailing slash
542	- $~~file_dir_path~~ = rtrim( $~~file_dir_path~~, '/\\' ) ~~. '/'~~;
543
544	- return $~~file_dir_path~~;
545	}
546
547
548	/**
549	- * get cache file ~~scheme~~
550	*
551	- * @since 1.4.0
552	- * @change 1.5.0
553	*
554	- * @return string ~~https~~ or ~~http~~
555	*/
556
557	- private static function ~~cache_file_scheme~~() {
558	-
559	- return ( ( isset( $_SERVER['HTTPS'] ) && $_SERVER['HTTPS'] !== 'off' ) \|\| $_SERVER['SERVER_PORT'] == '443' ) ? 'https' : 'http';
560	- }
561	-
562
563	- /**
564	- * ~~get~~ ~~complete~~ ~~cache~~ ~~file~~ ~~path~~ ~~(HTML)~~
565	- *
566	- * @since 1.0.0
567	- * @change 1.4.0
568	- *
569	- * @return string file path to new or potentially cached page
570	- */
571
572	- ~~private~~ ~~static function cache_file_html() {~~
573	-
574	- return self::cache_file_dir_path() . self::cache_file_scheme() . '-' . self::CACHE_FILE_HTML;
575	}
576
577
578	/**
579	- * get ~~complete~~ cache ~~file path (Gzip)~~
580	*
581	- * @since 1.0.1
582	- * @change 1.4.0
583	*
584	- * @return ~~string~~ ~~file~~ ~~path~~ to new or potentially cached page
585	*/
586
587	- private static function ~~cache_file_gzip~~() {
588
589	- ~~return~~ ~~self::cache_file_dir_path()~~ . ~~self::cache_file_scheme()~~ ~~. '-' . self::CACHE_FILE_GZIP;~~
590	- }





591








592
593	- /**
594	- * ~~get~~ ~~complete~~ ~~cache~~ ~~file path (WebP HTML)~~
595	- *
596	- * ~~@since 1.0.7~~
597	- * ~~@change 1.4.0~~
598	- *
599	- * ~~@return string file~~ ~~path~~ to ~~new~~ or ~~potentially cached page~~
600	- */












601
602	- ~~private~~ ~~static function cache_file_webp_html() {~~





603
604	- return ~~self::cache_file_dir_path() . self::cache_file_scheme() . '-' . self::CACHE_FILE_WEBP_HTML~~;
605	}
606
607
608	/**
609	- * get ~~complete~~ cache ~~file path (WebP Gzip)~~
610	*
611	- * @since 1.0.1
612	- * @change 1.4.0
613	*
614	- * @~~return~~ string file ~~path~~ to new ~~or potentially~~ cached page

615	*/
616
617	- private static function ~~cache_file_webp_gzip~~() {







618
619	- return ~~self::cache_file_dir_path() . self::cache_file_scheme() . '-' . self::CACHE_FILE_WEBP_GZIP~~;
620	}
621
622
623	/**
624	- * get ~~cached~~ ~~page~~
625	*
626	* @since 1.0.0
627	- * @change 1.5.0



628	*/
629
630	- public static function ~~get_cache~~() {
631
632	- // ~~set~~ ~~X-Cache-Handler response header~~
633	- header( 'X-Cache-Handler: cache-enabler-engine' );
634
635	- // get ~~request~~ ~~headers~~
636	- if ( ~~function_exists~~( ~~'apache_request_headers'~~ ) ) {
637	- $~~headers~~ = ~~apache_request_headers~~();
638	- ~~$http_if_modified_since~~ = ( ~~isset(~~ ~~$headers[ 'If-Modified-Since' ] ) ) ? $headers[ 'If-Modified-Since' ] : '';~~
639	- $http_accept = ( isset( $headers[ 'Accept' ] ) ) ? $headers[ 'Accept' ] : '';
640	- $http_accept_encoding = ( isset( $headers[ 'Accept-Encoding' ] ) ) ? $headers[ 'Accept-Encoding' ] : '';
641	} else {
642	- $~~http_if_modified_since~~ = ( ~~isset~~( ~~$_SERVER[ 'HTTP_IF_MODIFIED_SINCE' ]~~ ) ) ~~? $_SERVER[ 'HTTP_IF_MODIFIED_SINCE' ] : ''~~;
643	- $http_accept = ( isset( $_SERVER[ 'HTTP_ACCEPT' ] ) ) ? $_SERVER[ 'HTTP_ACCEPT' ] : '';
644	- $http_accept_encoding = ( isset( $_SERVER[ 'HTTP_ACCEPT_ENCODING' ] ) ) ? $_SERVER[ 'HTTP_ACCEPT_ENCODING' ] : '';
645	}
646
647	- // check ~~modified~~ ~~since~~ ~~with~~ ~~cached file and return 304 if no difference~~
648	- if ( ~~$http_if_modified_since &&~~ ( ~~strtotime(~~ $~~http_if_modified_since~~ ) ~~>= filemtime( self::cache_file_html(~~) ~~) ) )~~ {
649	- ~~header(~~ $~~_SERVER['SERVER_PROTOCOL'] . ' 304 Not Modified', true, 304 )~~;
650	- exit;
651	}
652
653	- // ~~check~~ ~~webp~~ ~~and~~ ~~deliver~~ ~~gzip~~ ~~webp file if support~~
654	- if ( ~~$http_accept~~ ~~&& ( strpos( $http_accept, 'webp' ) !== false ) ) {~~
655	- if ( ~~is_readable~~( self~~::cache_file_webp_gzip~~() ) ) {
656	- header( 'Content-Encoding: gzip' );
657	- return self::cache_file_webp_gzip();
658	- } elseif ( is_readable( self::cache_file_webp_html() ) ) {
659	- return self::cache_file_webp_html();
660	- }
661	- }
662
663	- // ~~check~~ ~~encoding~~ ~~and~~ ~~deliver~~ ~~gzip~~ ~~file if support~~
664	- ~~if (~~ $~~http_accept_encoding~~ && ( ~~strpos(~~ $~~http_accept_encoding,~~ ~~'gzip'~~ ) ~~!== false ) && is_readable( self::cache_file_gzip() ) ) {~~
665	- ~~header~~( ~~'Content-Encoding:~~ ~~gzip'~~ );
666	- ~~return~~ ~~self::cache_file_gzip~~();

667	}
668
669	- // ~~get default cached file~~
670	- return self::cache_file_html();
671	}
672
673
	@@ -697,7 +614,7 @@ final class Cache_Enabler_Disk {
697	* get settings file name
698	*
699	* @since 1.5.5
700	- * @change 1.6.0
701	*
702	* @param boolean $fallback whether or not fallback settings file name should be returned
703	* @param boolean $skip_blog_path whether or not blog path should be included in settings file name
	@@ -726,13 +643,12 @@ final class Cache_Enabler_Disk {
726	$settings_file_regex = '/\.php$/';
727
728	if ( is_multisite() ) {
729	- $settings_file_regex = '/^' . ~~parse_url( 'http://' .~~ strtolower( ~~$_SERVER~~['~~HTTP_HOST~~'] )~~, PHP_URL_HOST )~~;
730	$settings_file_regex = str_replace( '.', '\.', $settings_file_regex );
731
732	// subdirectory network
733	if ( defined( 'SUBDOMAIN_INSTALL' ) && ! SUBDOMAIN_INSTALL && ! $skip_blog_path ) {
734	- $url_path = $_SERVER['REQUEST_URI'];
735	- $url_path = trim( $url_path, '/');
736
737	if ( ! empty( $url_path ) ) {
738	$url_path_regex = str_replace( '/', '\|', $url_path );
	@@ -754,7 +670,7 @@ final class Cache_Enabler_Disk {
754	$settings_file_name = self::get_settings_file_name( $fallback, $skip_blog_path );
755	}
756	} else {
757	- $settings_file_name = ~~parse_url( 'http://' .~~ strtolower( ~~$_SERVER~~['~~HTTP_HOST~~'] )~~, PHP_URL_HOST )~~;
758
759	// subdirectory network
760	if ( is_multisite() && defined( 'SUBDOMAIN_INSTALL' ) && ! SUBDOMAIN_INSTALL && ! $skip_blog_path ) {
	@@ -832,7 +748,7 @@ final class Cache_Enabler_Disk {
832	* @since 1.4.7
833	* @change 1.6.0
834	*
835	- * @param string $dir directory path
836	* @return array $dir_objects directory objects
837	*/
838
	@@ -854,7 +770,7 @@ final class Cache_Enabler_Disk {
854	* get site file system objects
855	*
856	* @since 1.6.0
857	- * @change 1.6.0
858	*
859	* @param string $site_url site URL
860	* @return array $site_objects site objects
	@@ -865,7 +781,7 @@ final class Cache_Enabler_Disk {
865	$site_objects = array();
866
867	// get directory
868	- $dir = self::~~cache_file_dir_path~~( $site_url );
869
870	// check if directory exists
871	if ( ! is_dir( $dir ) ) {
	@@ -881,10 +797,10 @@ final class Cache_Enabler_Disk {
881	$blog_paths = Cache_Enabler::get_blog_paths();
882
883	// check if main site in subdirectory network
884	- if ( ! in_array( $blog_path, $blog_paths ) ) {
885	foreach ( $site_objects as $key => $site_object ) {
886	// delete site object if it does not belong to main site
887	- if ( in_array( '/' . $site_object . '/', $blog_paths ) ) {
888	unset( $site_objects[ $key ] );
889	}
890	}
	@@ -895,11 +811,147 @@ final class Cache_Enabler_Disk {
895	}
896
897








































































































































898	/**
899	* set or unset WP_CACHE constant in wp-config.php
900	*
901	* @since 1.1.1
902	- * @change 1.5.0
903	*
904	* @param boolean $set true to set WP_CACHE constant, false to unset
905	*/
	@@ -913,10 +965,12 @@ final class Cache_Enabler_Disk {
913	} elseif ( @file_exists( dirname( ABSPATH ) . '/wp-config.php' ) && ! @file_exists( dirname( ABSPATH ) . '/wp-settings.php' ) ) {
914	// config file resides one level above ABSPATH but is not part of another installation
915	$wp_config_file = dirname( ABSPATH ) . '/wp-config.php';


916	}
917
918	// check if config file can be written to
919	- if ( ! is_writable( $wp_config_file ) ) {
920	return;
921	}
922
	@@ -948,32 +1002,43 @@ final class Cache_Enabler_Disk {
948	}
949
950	// update config file
951	- file_put_contents( $wp_config_file, $wp_config_file_contents );
952	}
953
954
955	/**
956	- * ~~get~~ ~~image~~ ~~path~~
957	*
958	- * @since 1.4.8
959	- * @change 1.5.0
960	*
961	- * @param string $~~image_url full~~ or ~~relative~~ ~~URL~~ ~~with~~ or ~~without~~ ~~intrinsic width or density descriptor~~
962	- * @return string $~~image_path~~ ~~path~~ to ~~image~~
963	*/
964
965	- private static function ~~image_path~~( $~~image_url~~ ) {
966
967	- // in ~~case~~ ~~image~~ ~~has~~ ~~intrinsic~~ ~~width~~ ~~or density descriptor~~
968	- $~~image_parts~~ = ~~explode~~( ' ', ~~$image_url~~ );
969	- $image_url = $image_parts[0];
970
971	- // ~~in case installation is in a subdirectory~~
972	- $~~image_url_path~~ = ~~ltrim~~( ~~parse_url(~~ $~~image_url,~~ ~~PHP_URL_PATH~~ )~~, '/' )~~;
973	- $installation_dir = preg_replace( '/^[^\/]+\/\K.+/', '', $image_url_path );
974	- $image_path = str_replace( $installation_dir, '', ABSPATH ) . $image_url_path;
975
976	- ~~return~~ ~~$image_path;~~














977	}
978
979
	@@ -1000,14 +1065,14 @@ final class Cache_Enabler_Disk {
1000	foreach ( $image_urls as &$image_url ) {
1001	$image_url = trim( $image_url, ' ' );
1002	$image_url_webp = preg_replace( $image_extension_regex, '$1.webp', $image_url ); // append .webp extension
1003	- $image_path_webp = self::~~image_path~~( $image_url_webp );
1004
1005	// check if WebP image exists
1006	if ( is_file( $image_path_webp ) ) {
1007	$image_url = $image_url_webp;
1008	} else {
1009	$image_url_webp = preg_replace( $image_extension_regex, '', $image_url_webp ); // remove default extension
1010	- $image_path_webp = self::~~image_path~~( $image_url_webp );
1011
1012	// check if WebP image exists
1013	if ( is_file( $image_path_webp ) ) {
	@@ -1027,21 +1092,16 @@ final class Cache_Enabler_Disk {
1027	* minify HTML
1028	*
1029	* @since 1.0.0
1030	- * @change 1.6.2
1031	*
1032	* @param string $page_contents contents of a page from the output buffer
1033	- * @return string $minified_html~~\|$page_contents~~ minified page contents if applicable, unchanged otherwise
1034	*/
1035
1036	private static function minify_html( $page_contents ) {
1037
1038	- // check if setting is enabled
1039	- if ( ! Cache_Enabler_Engine::$settings['minify_html'] ) {
1040	- return $page_contents;
1041	- }
1042	-
1043	// HTML character limit
1044	- if ( strlen( $page_contents ) > 700000) {
1045	return $page_contents;
1046	}
1047
	@@ -1070,7 +1130,7 @@ final class Cache_Enabler_Disk {
1070	// if setting selected remove CSS and JavaScript comments
1071	if ( Cache_Enabler_Engine::$settings['minify_inline_css_js'] ) {
1072	$minified_html = preg_replace(
1073	- '#/\[\s\S]?\/\|([~~^\'~~\~~"\\:\w~~]\|^)~~//.$#~~m',
1074	'$1',
1075	$minified_html
1076	);
	@@ -1123,7 +1183,7 @@ final class Cache_Enabler_Disk {
1123	* delete settings file
1124	*
1125	* @since 1.5.0
1126	- * @change 1.5.0
1127	*/
1128
1129	private static function delete_settings_file() {
	@@ -1136,6 +1196,9 @@ final class Cache_Enabler_Disk {
1136
1137	// delete settings directory if empty
1138	@rmdir( self::$settings_dir );



1139	}
1140
1141
	@@ -1152,6 +1215,19 @@ final class Cache_Enabler_Disk {
1152	wp_die( 'URL is empty.' );
1153	}
1154
1155	- self::clear_dir( self::~~cache_file_dir_path~~( $url ) );













1156	}
1157	}


47	private static $dir_cleared = array();
48
49















50	/**
51	* configure system files
52	*
53	* @since 1.5.0
54	+ * @change 1.7.0
55	*/
56
57	public static function setup() {
58
59	// add advanced-cache.php drop-in
60	+ copy( CACHE_ENABLER_DIR . '/advanced-cache.php', WP_CONTENT_DIR . '/advanced-cache.php' );
61
62	// set WP_CACHE constant in config file if not already set
63	self::set_wp_cache_constant();

91
92
93	/**
94	+ * store cached page
95	*
96	* @since 1.0.0
97	+ * @change 1.7.0
98	*
99	* @param string $page_contents contents of a page from the output buffer
100	*/
101
102	public static function cache_page( $page_contents ) {
103
104	+ // page contents before store hook
105	+ $page_contents = apply_filters( 'cache_enabler_page_contents_before_store', $page_contents );


106
107	+ // deprecated page contents before store hook
108	+ $page_contents = apply_filters_deprecated( 'cache_enabler_before_store', array( $page_contents ), '1.6.0', 'cache_enabler_page_contents_before_store' );
109	+
110	+ // create cached page to be stored
111	+ self::create_cache_file( $page_contents );
112	}
113
114

116	* check if cached page exists
117	*
118	* @since 1.0.0
119	+ * @change 1.7.0
120	*
121	+ * @param string $cache_file file path to potentially cached page
122	+ * @return boolean true if cached page exists and is readable, false otherwise
123	*/
124
125	+ public static function cache_exists( $cache_file ) {
126
127	+ return is_readable( $cache_file );
128	}
129
130

132	* check if cached page expired
133	*
134	* @since 1.0.1
135	+ * @change 1.7.0
136	*
137	+ * @param string $cache_file file path to existing cached page
138	+ * @return boolean true if cached page expired, false otherwise
139	*/
140
141	+ public static function cache_expired( $cache_file ) {
142
143	// check if cached pages are set to expire
144	if ( ! Cache_Enabler_Engine::$settings['cache_expires'] \|\| Cache_Enabler_Engine::$settings['cache_expiry_time'] === 0 ) {

149	$expires_seconds = 60 * 60 * Cache_Enabler_Engine::$settings['cache_expiry_time'];
150
151	// check if cached page has expired
152	+ if ( ( filemtime( $cache_file ) + $expires_seconds ) <= $now ) {
153	return true;
154	}
155

157	}
158
159





























































160	/**
161	* clear cached page(s)
162	*
163	* @since 1.0.0
164	+ * @change 1.7.0
165	*
166	* @param string $clear_url full URL to potentially cached page
167	* @param string $clear_type clear the `pagination` cache or all `subpages` cache instead of only the `page` cache

175	}
176
177	// get directory
178	+ $dir = self::get_cache_file_dir( $clear_url );
179
180	// check if directory exists
181	if ( ! is_dir( $dir ) ) {
182	return;
183	}
184




185	// check if page and subpages cache should be cleared
186	if ( $clear_type === 'subpages' ) {
187	self::clear_dir( $dir );

193	if ( $clear_type === 'pagination' ) {
194	$pagination_base = $GLOBALS['wp_rewrite']->pagination_base;
195	if ( strlen( $pagination_base ) > 0 ) {
196	+ $pagination_dir = $dir . '/' . $pagination_base;
197	self::clear_dir( $pagination_dir );
198	}
199	}

221	}
222
223	// site cache cleared hook
224	+ if ( $dir === self::get_cache_file_dir( home_url() ) ) {
225	$site_cleared_url = home_url();
226	$site_cleared_id = get_current_blog_id();
227	do_action( 'cache_enabler_site_cache_cleared', $site_cleared_url, $site_cleared_id );

240	* @since 1.0.0
241	* @change 1.6.0
242	*
243	+ * @param string $dir directory path to clear
244	* @param boolean $skip_child_dir whether or not child directories should be skipped
245	*/
246
247	private static function clear_dir( $dir, $skip_child_dir = false ) {
248
249	+ // remove trailing slash if there happens to be one
250	$dir = untrailingslashit( $dir );
251
252	// check if directory exists

281
282
283	/**
284	+ * create file for cache
285	*
286	* @since 1.0.0
287	+ * @change 1.7.0
288	*
289	* @param string $page_contents contents of a page from the output buffer
290	*/
291
292	+ private static function create_cache_file( $page_contents ) {



293
294	+ // check cache file requirements
295	+ if ( ! is_string( $page_contents ) \|\| strlen( $page_contents ) === 0 ) {
296	+ return;
297	}
298
299	+ // get new cache file
300	+ $new_cache_file = self::get_cache_file();
301	+ $new_cache_file_dir = dirname( $new_cache_file );
302	+ $new_cache_file_name = basename( $new_cache_file );

303
304	+ // if setting enabled minify HTML
305	+ if ( Cache_Enabler_Engine::$settings['minify_html'] ) {
306	+ $page_contents = self::minify_html( $page_contents );




307	}
308
309	+ // append cache signature
310	+ $page_contents = $page_contents . self::get_cache_signature( $new_cache_file_name );
















311
312	+ // convert image URLs to WebP if applicable
313	+ if ( strpos( $new_cache_file_name, 'webp' ) !== false ) {
314	+ $page_contents = self::converter( $page_contents );
315	+ }
316
317	+ // compress page contents with Gzip if applicable
318	+ if ( strpos( $new_cache_file_name, 'gz' ) !== false ) {
319	+ $page_contents = gzencode( $page_contents, 9 );
320
321	+ // check if Gzip compression failed
322	+ if ( $page_contents === false ) {
323	+ return;




324	}
325	}












326
327	+ // create directory if necessary
328	+ if ( ! self::mkdir_p( $new_cache_file_dir ) ) {
329	+ return;
330	+ }
331
332	+ // create new cache file
333	+ file_put_contents( $new_cache_file, $page_contents, LOCK_EX );
334
335	// clear file status cache
336	clearstatcache();
337
338	+ // set file permissions
339	+ $new_cache_file_stats = @stat( $new_cache_file_dir );
340	+ $new_cache_file_perms = $new_cache_file_stats['mode'] & 0007777;
341	+ $new_cache_file_perms = $new_cache_file_perms & 0000666;
342	+ @chmod( $new_cache_file, $new_cache_file_perms );
343
344	// clear file status cache
345	clearstatcache();

350	* create settings file
351	*
352	* @since 1.2.3
353	+ * @change 1.7.0
354	*
355	* @param array $settings settings from database
356	+ * @return string $new_settings_file file path to new settings file
357	*/
358
359	public static function create_settings_file( $settings ) {
360





361	// check settings file requirements
362	+ if ( ! is_array( $settings ) \|\| ! function_exists( 'home_url' ) ) {
363	return;
364	}
365
366	// get new settings file
367	$new_settings_file = self::get_settings_file();
368





369	// add new settings file contents
370	$new_settings_file_contents = '<?php' . PHP_EOL;
371	$new_settings_file_contents .= '/**' . PHP_EOL;

374	$new_settings_file_contents .= ' * @since 1.5.0' . PHP_EOL;
375	$new_settings_file_contents .= ' * @change 1.5.0' . PHP_EOL;
376	$new_settings_file_contents .= ' *' . PHP_EOL;
377	+ $new_settings_file_contents .= ' * @generated ' . self::get_current_time() . PHP_EOL;
378	$new_settings_file_contents .= ' */' . PHP_EOL;
379	$new_settings_file_contents .= PHP_EOL;
380	$new_settings_file_contents .= 'return ' . var_export( $settings, true ) . ';';
381
382	+ // create directory if necessary
383	+ if ( ! self::mkdir_p( dirname( $new_settings_file ) ) ) {
384	+ return;
385	+ }
386	+
387	+ // create new settings file
388	+ file_put_contents( $new_settings_file, $new_settings_file_contents, LOCK_EX );
389
390	return $new_settings_file;
391	}
392
393
394	+ /**
395	+ * get cache file
396	+ *
397	+ * @since 1.7.0
398	+ * @change 1.7.0
399	+ *
400	+ * @return string $cache_file file path to new or potentially cached page
401	+ */
402	+
403	+ public static function get_cache_file() {
404	+
405	+ $cache_file = sprintf(
406	+ '%s/%s',
407	+ self::get_cache_file_dir(),
408	+ self::get_cache_file_name()
409	+ );
410	+
411	+ return $cache_file;
412	+ }
413	+
414	+
415	/**
416	* get cache file directory path
417	*
418	* @since 1.0.0
419	+ * @change 1.7.0
420	*
421	+ * @param string $url full URL to potentially cached page
422	+ * @return string $cache_file_dir directory path to new or potentially cached page, empty if provided URL is invalid
423	*/
424
425	+ private static function get_cache_file_dir( $url = null ) {
426
427	+ $cache_file_dir = '';
428
429	// validate URL
430	if ( $url && ! filter_var( $url, FILTER_VALIDATE_URL ) ) {
431	+ return $cache_file_dir;
432	}
433
434	+ $cache_file_dir = sprintf(
435	'%s/%s%s',
436	self::$cache_dir,
437	+ ( $url ) ? parse_url( $url, PHP_URL_HOST ) : strtolower( Cache_Enabler_Engine::$request_headers['Host'] ),
438	+ parse_url( ( $url ) ? $url : $_SERVER['REQUEST_URI'], PHP_URL_PATH )






439	);
440
441	+ // remove trailing slash
442	+ $cache_file_dir = rtrim( $cache_file_dir, '/\\' );
443
444	+ return $cache_file_dir;
445	}
446
447
448	/**
449	+ * get cache file name
450	*
451	+ * @since 1.7.0
452	+ * @change 1.7.0
453	*
454	+ * @return string $cache_file_name file name for new or potentially cached page
455	*/
456
457	+ private static function get_cache_file_name() {




458
459	+ $cache_keys = self::get_cache_keys();
460	+ $cache_file_name = $cache_keys['scheme'] . 'index' . $cache_keys['device'] . $cache_keys['webp'] . '.html' . $cache_keys['compression'];






461
462	+ return $cache_file_name;


463	}
464
465
466	/**
467	+ * get cache keys
468	*
469	+ * @since 1.7.0
470	+ * @change 1.7.0
471	*
472	+ * @return array $cache_keys cache keys to new or potentially cached page
473	*/
474
475	+ private static function get_cache_keys() {
476
477	+ // set default cache keys
478	+ $cache_keys = array(
479	+ 'scheme' => 'http-',
480	+ 'device' => '',
481	+ 'webp' => '',
482	+ 'compression' => '',
483	+ );
484
485	+ // scheme
486	+ if ( isset( $_SERVER['HTTPS'] ) && ( strtolower( $_SERVER['HTTPS'] ) === 'on' \|\| $_SERVER['HTTPS'] == '1' ) ) {
487	+ $cache_keys['scheme'] = 'https-';
488	+ } elseif ( isset( $_SERVER['SERVER_PORT'] ) && $_SERVER['SERVER_PORT'] == '443' ) {
489	+ $cache_keys['scheme'] = 'https-';
490	+ } elseif ( Cache_Enabler_Engine::$request_headers['X-Forwarded-Proto'] === 'https' \|\| Cache_Enabler_Engine::$request_headers['X-Forwarded-Scheme'] === 'https' ) {
491	+ $cache_keys['scheme'] = 'https-';
492	+ }
493
494	+ // device
495	+ if ( Cache_Enabler_Engine::$settings['mobile_cache'] ) {
496	+ if ( strpos( Cache_Enabler_Engine::$request_headers['User-Agent'], 'Mobile' ) !== false
497	+ \|\| strpos( Cache_Enabler_Engine::$request_headers['User-Agent'], 'Android' ) !== false
498	+ \|\| strpos( Cache_Enabler_Engine::$request_headers['User-Agent'], 'Silk/' ) !== false
499	+ \|\| strpos( Cache_Enabler_Engine::$request_headers['User-Agent'], 'Kindle' ) !== false
500	+ \|\| strpos( Cache_Enabler_Engine::$request_headers['User-Agent'], 'BlackBerry' ) !== false
501	+ \|\| strpos( Cache_Enabler_Engine::$request_headers['User-Agent'], 'Opera Mini' ) !== false
502	+ \|\| strpos( Cache_Enabler_Engine::$request_headers['User-Agent'], 'Opera Mobi' ) !== false
503	+ ) {
504	+ $cache_keys['device'] = '-mobile';
505	+ }
506	+ }
507	+
508	+ // WebP
509	+ if ( Cache_Enabler_Engine::$settings['convert_image_urls_to_webp'] ) {
510	+ if ( strpos( Cache_Enabler_Engine::$request_headers['Accept'], 'image/webp' ) !== false ) {
511	+ $cache_keys['webp'] = '-webp';
512	+ }
513	+ }
514
515	+ // compression
516	+ if ( Cache_Enabler_Engine::$settings['compress_cache'] ) {
517	+ if ( strpos( Cache_Enabler_Engine::$request_headers['Accept-Encoding'], 'gzip' ) !== false ) {
518	+ $cache_keys['compression'] = '.gz';
519	+ }
520	+ }
521
522	+ return $cache_keys;
523	}
524
525
526	/**
527	+ * get cache signature
528	*
529	+ * @since 1.0.0
530	+ * @change 1.7.0
531	*
532	+ * @param string $cache_file_name file name for new cached page
533	+ * @return string $cache_signature cache signature
534	*/
535
536	+ private static function get_cache_signature( $cache_file_name ) {
537	+
538	+ $cache_signature = sprintf(
539	+ '<!-- %s @ %s (%s) -->',
540	+ 'Cache Enabler by KeyCDN',
541	+ self::get_current_time(),
542	+ $cache_file_name
543	+ );
544
545	+ return $cache_signature;
546	}
547
548
549	/**
550	+ * get cache size from disk
551	*
552	* @since 1.0.0
553	+ * @change 1.7.0
554	+ *
555	+ * @param string $dir directory path to scan recursively
556	+ * @return integer $cache_size cache size in bytes
557	*/
558
559	+ public static function get_cache_size( $dir = null ) {
560
561	+ $cache_size = 0;

562
563	+ // get directory objects if provided directory exists
564	+ if ( is_dir( $dir ) ) {
565	+ $dir_objects = self::get_dir_objects( $dir );
566	+ // get site objects otherwise


567	} else {
568	+ $dir_objects = self::get_site_objects( home_url() );


569	}
570
571	+ // check if directory is empty
572	+ if ( empty( $dir_objects ) ) {
573	+ return $cache_size;

574	}
575
576	+ foreach ( $dir_objects as $dir_object ) {
577	+ // get full path
578	+ $dir_object = trailingslashit( ( $dir ) ? $dir : ( self::$cache_dir . '/' . parse_url( home_url(), PHP_URL_HOST ) . parse_url( home_url(), PHP_URL_PATH ) ) ) . $dir_object;






579
580	+ if ( is_dir( $dir_object ) ) {
581	+ $cache_size += self::get_cache_size( $dir_object );
582	+ } elseif ( is_file( $dir_object ) ) {
583	+ $cache_size += filesize( $dir_object );
584	+ }
585	}
586
587	+ return $cache_size;

588	}
589
590

614	* get settings file name
615	*
616	* @since 1.5.5
617	+ * @change 1.7.0
618	*
619	* @param boolean $fallback whether or not fallback settings file name should be returned
620	* @param boolean $skip_blog_path whether or not blog path should be included in settings file name

643	$settings_file_regex = '/\.php$/';
644
645	if ( is_multisite() ) {
646	+ $settings_file_regex = '/^' . strtolower( Cache_Enabler_Engine::$request_headers['Host'] );
647	$settings_file_regex = str_replace( '.', '\.', $settings_file_regex );
648
649	// subdirectory network
650	if ( defined( 'SUBDOMAIN_INSTALL' ) && ! SUBDOMAIN_INSTALL && ! $skip_blog_path ) {
651	+ $url_path = trim( parse_url( $_SERVER['REQUEST_URI'], PHP_URL_PATH ), '/' );

652
653	if ( ! empty( $url_path ) ) {
654	$url_path_regex = str_replace( '/', '\|', $url_path );

670	$settings_file_name = self::get_settings_file_name( $fallback, $skip_blog_path );
671	}
672	} else {
673	+ $settings_file_name = strtolower( Cache_Enabler_Engine::$request_headers['Host'] );
674
675	// subdirectory network
676	if ( is_multisite() && defined( 'SUBDOMAIN_INSTALL' ) && ! SUBDOMAIN_INSTALL && ! $skip_blog_path ) {

748	* @since 1.4.7
749	* @change 1.6.0
750	*
751	+ * @param string $dir directory path to scan
752	* @return array $dir_objects directory objects
753	*/
754

770	* get site file system objects
771	*
772	* @since 1.6.0
773	+ * @change 1.7.0
774	*
775	* @param string $site_url site URL
776	* @return array $site_objects site objects

781	$site_objects = array();
782
783	// get directory
784	+ $dir = self::get_cache_file_dir( $site_url );
785
786	// check if directory exists
787	if ( ! is_dir( $dir ) ) {

797	$blog_paths = Cache_Enabler::get_blog_paths();
798
799	// check if main site in subdirectory network
800	+ if ( ! in_array( $blog_path, $blog_paths, true ) ) {
801	foreach ( $site_objects as $key => $site_object ) {
802	// delete site object if it does not belong to main site
803	+ if ( in_array( '/' . $site_object . '/', $blog_paths, true ) ) {
804	unset( $site_objects[ $key ] );
805	}
806	}

811	}
812
813
814	+ /**
815	+ * get current time
816	+ *
817	+ * @since 1.7.0
818	+ * @change 1.7.0
819	+ *
820	+ * @return string $current_time current time in HTTP-date format
821	+ */
822	+
823	+ private static function get_current_time() {
824	+
825	+ $current_time = current_time( 'D, d M Y H:i:s', true ) . ' GMT';
826	+
827	+ return $current_time;
828	+ }
829	+
830	+
831	+ /**
832	+ * get image path
833	+ *
834	+ * @since 1.4.8
835	+ * @change 1.7.0
836	+ *
837	+ * @param string $image_url full or relative URL with or without intrinsic width or density descriptor
838	+ * @return string $image_path file path to image
839	+ */
840	+
841	+ private static function get_image_path( $image_url ) {
842	+
843	+ // in case image has intrinsic width or density descriptor
844	+ $image_parts = explode( ' ', $image_url );
845	+ $image_url = $image_parts[0];
846	+
847	+ // in case installation is in a subdirectory
848	+ $image_url_path = ltrim( parse_url( $image_url, PHP_URL_PATH ), '/' );
849	+ $installation_dir = ltrim( parse_url( site_url( '/' ), PHP_URL_PATH ), '/' );
850	+ $image_path = str_replace( $installation_dir, '', ABSPATH ) . $image_url_path;
851	+
852	+ return $image_path;
853	+ }
854	+
855	+
856	+ /**
857	+ * get current WP Filesystem instance
858	+ *
859	+ * @since 1.7.0
860	+ * @change 1.7.0
861	+ *
862	+ * @throws \RuntimeException if filesystem could not be initialized
863	+ * @return WP_Filesystem_Base $wp_filesystem filesystem instance
864	+ */
865	+
866	+ public static function get_filesystem() {
867	+
868	+ global $wp_filesystem;
869	+
870	+ // check if we already have a filesystem instance
871	+ if ( $wp_filesystem instanceof WP_Filesystem_Base ) {
872	+ return $wp_filesystem;
873	+ }
874	+
875	+ // try initializing filesystem instance and cache the result
876	+ try {
877	+ require_once ABSPATH . 'wp-admin/includes/file.php';
878	+
879	+ $filesystem = WP_Filesystem();
880	+
881	+ if ( $filesystem === null ) {
882	+ throw new \RuntimeException( 'The provided filesystem method is unavailable.' );
883	+ }
884	+
885	+ if ( $filesystem === false ) {
886	+ if ( is_wp_error( $wp_filesystem->errors ) && $wp_filesystem->errors->has_errors() ) {
887	+ throw new \RuntimeException(
888	+ $wp_filesystem->get_error_message,
889	+ ( is_numeric( $wp_error->get_error_code() ) ) ? (int) $wp_error->get_error_code() : 0
890	+ );
891	+ }
892	+
893	+ throw new \RuntimeException( 'Unspecified failure.' );
894	+ }
895	+
896	+ if ( ! is_object( $wp_filesystem ) \|\| ! $wp_filesystem instanceof WP_Filesystem_Base ) {
897	+ throw new \RuntimeException( '$wp_filesystem is not an instance of WP_Filesystem_Base.' );
898	+ }
899	+ } catch ( \Exception $e ) {
900	+ throw new \RuntimeException(
901	+ sprintf( 'There was an error initializing the WP_Filesystem class: %1$s', $e->getMessage() ),
902	+ $e->getCode(),
903	+ $e
904	+ );
905	+ }
906	+
907	+ return $wp_filesystem;
908	+ }
909	+
910	+
911	+ /**
912	+ * makes directory recursively based on directory path
913	+ *
914	+ * @since 1.7.0
915	+ * @change 1.7.0
916	+ *
917	+ * @param string $dir directory path to create
918	+ * @return boolean true if the directory either already exists or was created and has the correct permissions, false otherwise
919	+ */
920	+
921	+ private static function mkdir_p( $dir ) {
922	+
923	+ $parent_dir = dirname( $dir );
924	+ $fs = self::get_filesystem();
925	+
926	+ // check if directory and its parent have 755 permissions
927	+ if ( $fs->is_dir( $dir ) && $fs->getchmod( $dir ) === '755' && $fs->getchmod( $parent_dir ) === '755' ) {
928	+ return true;
929	+ }
930	+
931	+ // create any directories that do not exist yet
932	+ if ( ! wp_mkdir_p( $dir ) ) {
933	+ return false;
934	+ }
935	+
936	+ // check parent directory permissions
937	+ if ( $fs->getchmod( $parent_dir ) !== '755' ) {
938	+ return $fs->chmod( $parent_dir, 0755, true );
939	+ }
940	+
941	+ // check directory permissions
942	+ if ( $fs->getchmod( $dir ) !== '755' ) {
943	+ return $fs->chmod( $dir, 0755 );
944	+ }
945	+
946	+ return true;
947	+ }
948	+
949	+
950	/**
951	* set or unset WP_CACHE constant in wp-config.php
952	*
953	* @since 1.1.1
954	+ * @change 1.7.0
955	*
956	* @param boolean $set true to set WP_CACHE constant, false to unset
957	*/

965	} elseif ( @file_exists( dirname( ABSPATH ) . '/wp-config.php' ) && ! @file_exists( dirname( ABSPATH ) . '/wp-settings.php' ) ) {
966	// config file resides one level above ABSPATH but is not part of another installation
967	$wp_config_file = dirname( ABSPATH ) . '/wp-config.php';
968	+ } else {
969	+ $wp_config_file = false;
970	}
971
972	// check if config file can be written to
973	+ if ( ! $wp_config_file \|\| ! is_writable( $wp_config_file ) ) {
974	return;
975	}
976

1002	}
1003
1004	// update config file
1005	+ file_put_contents( $wp_config_file, $wp_config_file_contents, LOCK_EX );
1006	}
1007
1008
1009	/**
1010	+ * convert page contents
1011	*
1012	+ * @since 1.7.0
1013	+ * @change 1.7.0
1014	*
1015	+ * @param string $page_contents contents of a page from the output buffer
1016	+ * @return string $converted_page_contents converted contents of a page from the output buffer
1017	*/
1018
1019	+ private static function converter( $page_contents ) {
1020
1021	+ // attributes to convert during WebP conversion hook
1022	+ $attributes = (array) apply_filters( 'cache_enabler_convert_webp_attributes', array( 'src', 'srcset', 'data-[^=]+' ) );

1023
1024	+ // stringify
1025	+ $attributes_regex = implode( '\|', $attributes );


1026
1027	+ // magic regex rule
1028	+ $image_urls_regex = '#(?:(?:(' . $attributes_regex . ')\s=\|(url)$)\s[\'\"]?\s)\K(?:[^\?\"\'\s>]+)(?:\.jpe?g\|\.png)(?:\s\d+[wx][^\"\'>])?(?=\/?[\"\'\s$>])(?=[^<{](?:\)[^<{]\}\|>))#i';
1029	+
1030	+ // ignore query strings during WebP conversion hook
1031	+ if ( ! apply_filters( 'cache_enabler_convert_webp_ignore_query_strings', true ) ) {
1032	+ $image_urls_regex = '#(?:(?:(' . $attributes_regex . ')\s=\|(url)$)\s[\'\"]?\s)\K(?:[^\"\'\s>]+)(?:\.jpe?g\|\.png)(?:\s\d+[wx][^\"\'>])?(?=\/?[\?\"\'\s$>])(?=[^<{](?:\)[^<{]\}\|>))#i';
1033	+ }
1034	+
1035	+ // page contents after WebP conversion hook
1036	+ $converted_page_contents = apply_filters( 'cache_enabler_page_contents_after_webp_conversion', preg_replace_callback( $image_urls_regex, 'self::convert_webp', $page_contents ) );
1037	+
1038	+ // deprecated page contents after WebP conversion hook
1039	+ $converted_page_contents = apply_filters_deprecated( 'cache_enabler_disk_webp_converted_data', array( $converted_page_contents ), '1.6.0', 'cache_enabler_page_contents_after_webp_conversion' );
1040	+
1041	+ return $converted_page_contents;
1042	}
1043
1044

1065	foreach ( $image_urls as &$image_url ) {
1066	$image_url = trim( $image_url, ' ' );
1067	$image_url_webp = preg_replace( $image_extension_regex, '$1.webp', $image_url ); // append .webp extension
1068	+ $image_path_webp = self::get_image_path( $image_url_webp );
1069
1070	// check if WebP image exists
1071	if ( is_file( $image_path_webp ) ) {
1072	$image_url = $image_url_webp;
1073	} else {
1074	$image_url_webp = preg_replace( $image_extension_regex, '', $image_url_webp ); // remove default extension
1075	+ $image_path_webp = self::get_image_path( $image_url_webp );
1076
1077	// check if WebP image exists
1078	if ( is_file( $image_path_webp ) ) {

1092	* minify HTML
1093	*
1094	* @since 1.0.0
1095	+ * @change 1.7.0
1096	*
1097	* @param string $page_contents contents of a page from the output buffer
1098	+ * @return string $page_contents\|$minified_html minified page contents if applicable, unchanged otherwise
1099	*/
1100
1101	private static function minify_html( $page_contents ) {
1102





1103	// HTML character limit
1104	+ if ( strlen( $page_contents ) > 700000 ) {
1105	return $page_contents;
1106	}
1107

1130	// if setting selected remove CSS and JavaScript comments
1131	if ( Cache_Enabler_Engine::$settings['minify_inline_css_js'] ) {
1132	$minified_html = preg_replace(
1133	+ '#/\(?!!)[\s\S]?\/\|(?:^[ \t])//.$\|((?<!\()[ \t>;,{}[\]])//[^;\n]$#m',
1134	'$1',
1135	$minified_html
1136	);

1183	* delete settings file
1184	*
1185	* @since 1.5.0
1186	+ * @change 1.7.0
1187	*/
1188
1189	private static function delete_settings_file() {

1196
1197	// delete settings directory if empty
1198	@rmdir( self::$settings_dir );
1199	+
1200	+ // delete parent directory of settings directory if empty
1201	+ @rmdir( dirname( self::$settings_dir ) );
1202	}
1203
1204

1215	wp_die( 'URL is empty.' );
1216	}
1217
1218	+ self::clear_dir( self::get_cache_file_dir( $url ) );
1219	+ }
1220	+
1221	+
1222	+ /**
1223	+ * get cache size
1224	+ *
1225	+ * @since 1.0.0
1226	+ * @deprecated 1.7.0
1227	+ */
1228	+
1229	+ public static function cache_size( $dir = null ) {
1230	+
1231	+ return self::get_cache_size( $dir );
1232	}
1233	}

inc/cache_enabler_engine.class.php CHANGED Viewed

	@@ -29,6 +29,7 @@ final class Cache_Enabler_Engine {
29	return self::$started;
30	}
31

32	/**
33	* engine status
34	*
	@@ -41,6 +42,18 @@ final class Cache_Enabler_Engine {
41	public static $started = false;
42
43












44	/**
45	* engine settings from disk or database
46	*
	@@ -57,11 +70,14 @@ final class Cache_Enabler_Engine {
57	* constructor
58	*
59	* @since 1.5.0
60	- * @change 1.6.0
61	*/
62
63	public function __construct() {
64



65	// get settings from disk if directory index file
66	if ( self::is_index() ) {
67	self::$settings = Cache_Enabler_Disk::get_settings();
	@@ -84,7 +100,7 @@ final class Cache_Enabler_Engine {
84	* check if engine should start
85	*
86	* @since 1.5.2
87	- * @change 1.5.4
88	*
89	* @return boolean true if engine should start, false otherwise
90	*/
	@@ -111,11 +127,6 @@ final class Cache_Enabler_Engine {
111	return false;
112	}
113
114	- // check if Host request header is empty
115	- if ( empty( $_SERVER['HTTP_HOST'] ) ) {
116	- return false;
117	- }
118	-
119	// check request URI
120	if ( str_replace( array( '.ico', '.txt', '.xml', '.xsl' ), '', $_SERVER['REQUEST_URI'] ) !== $_SERVER['REQUEST_URI'] ) {
121	return false;
	@@ -142,28 +153,49 @@ final class Cache_Enabler_Engine {
142	* end output buffering and cache page if applicable
143	*
144	* @since 1.0.0
145	- * @change 1.6.0
146	*
147	- * @param string $~~page_contents~~ contents ~~of a page~~ from the output buffer
148	- * @param integer $phase bitmask of PHP_OUTPUT_HANDLER_* constants
149	- * @return string $~~page_contents~~ contents ~~of a page~~ from the output buffer
150	*/
151
152	- private static function end_buffering( $~~page_contents~~, $phase ) {
153
154	if ( $phase & PHP_OUTPUT_HANDLER_FINAL \|\| $phase & PHP_OUTPUT_HANDLER_END ) {
155	- if ( ! self::is_cacheable( $~~page_contents~~ ) \|\| self::bypass_cache() ) {
156	- ~~return~~ $~~page_contents~~;
157	}

158
159	- ~~$page_contents~~ ~~= apply_filters( 'cache_enabler_page_contents_before_store',~~ $~~page_contents )~~;

160
161	- $page_contents = apply_filters_deprecated( 'cache_enabler_before_store', array( $page_contents ), '1.6.0', 'cache_enabler_page_contents_before_store' );
162
163	- ~~Cache_Enabler_Disk::cache_page( $page_contents );~~







164
165	- ~~return~~ ~~$page_contents;~~
166	- }













167	}
168
169
	@@ -187,20 +219,20 @@ final class Cache_Enabler_Engine {
187
188
189	/**
190	- * check if ~~page~~ can be cached
191	*
192	* @since 1.5.0
193	- * @change 1.5.0
194	*
195	- * @param string $~~page_contents~~ contents ~~of a page~~ from the output buffer
196	- * @return boolean true if ~~page~~ contents are cacheable, false otherwise
197	*/
198
199	- private static function is_cacheable( $~~page_contents~~ ) {
200
201	- $has_html_tag = ( stripos( $~~page_contents~~, '<html' ) !== false );
202	- $has_html5_doctype = preg_match( '/^<!DOCTYPE.+html>/i', ltrim( $~~page_contents~~ ) );
203	- $has_xsl_stylesheet = ( stripos( $~~page_contents~~, '<xsl:stylesheet' ) !== false \|\| stripos( $~~page_contents~~, '<?xml-stylesheet' ) !== false );
204
205	if ( $has_html_tag && $has_html5_doctype && ! $has_xsl_stylesheet ) {
206	return true;
	@@ -248,7 +280,7 @@ final class Cache_Enabler_Engine {
248	* check if page is excluded from cache
249	*
250	* @since 1.5.0
251	- * @change 1.5.3
252	*
253	* @return boolean true if page is excluded from the cache, false otherwise
254	*/
	@@ -257,7 +289,10 @@ final class Cache_Enabler_Engine {
257
258	// if post ID excluded
259	if ( ! empty( self::$settings['excluded_post_ids'] ) && function_exists( 'is_singular' ) && is_singular() ) {
260	- if ( ~~in_array(~~ get_queried_object_id()~~, (array) explode( ',', self::$settings['excluded_post_ids'] ) ) ) {~~



261	return true;
262	}
263	}
	@@ -296,7 +331,7 @@ final class Cache_Enabler_Engine {
296	$cookies_regex = '/^(wp-postpass\|wordpress_logged_in\|comment_author)_/';
297	}
298	// bypass cache if an excluded cookie is found
299	- foreach ( $_COOKIE as $key => $value) {
300	if ( preg_match( $cookies_regex, $key ) ) {
301	return true;
302	}
	@@ -326,26 +361,11 @@ final class Cache_Enabler_Engine {
326	}
327
328
329	- /**
330	- * check if mobile template
331	- *
332	- * @since 1.0.0
333	- * @change 1.0.0
334	- *
335	- * @return boolean true if mobile template, false otherwise
336	- */
337	-
338	- private static function is_mobile() {
339	-
340	- return ( strpos( TEMPLATEPATH, 'wptouch' ) \|\| strpos( TEMPLATEPATH, 'carrington' ) \|\| strpos( TEMPLATEPATH, 'jetpack' ) \|\| strpos( TEMPLATEPATH, 'handheld' ) );
341	- }
342	-
343	-
344	/**
345	* check if cache should be bypassed
346	*
347	* @since 1.0.0
348	- * @change 1.6.0
349	*
350	* @return boolean true if cache should be bypassed, false otherwise
351	*/
	@@ -384,7 +404,7 @@ final class Cache_Enabler_Engine {
384
385	// check conditional tags when output buffering has ended
386	if ( class_exists( 'WP' ) ) {
387	- if ( is_admin() \|\| self::is_search() \|\| is_feed() \|\| is_trackback() \|\| is_robots() \|\| is_preview() \|\| post_password_required() ~~\|\| self::is_mobile(~~) ) {
388	return true;
389	}
390	}
	@@ -397,15 +417,32 @@ final class Cache_Enabler_Engine {
397	* deliver cache
398	*
399	* @since 1.5.0
400	- * @change 1.6.0
401	*
402	* @return boolean false if cached page was not delivered
403	*/
404
405	public static function deliver_cache() {
406
407	- if ( Cache_Enabler_Disk::~~cache_exists~~() ~~&& ! Cache_Enabler_Disk::cache_expired() && ! self::bypass_cache() ) {~~
408	- ~~readfile( Cache_Enabler_Disk::get_cache() );~~

















409	exit;
410	}
411


29	return self::$started;
30	}
31
32	+
33	/**
34	* engine status
35	*

42	public static $started = false;
43
44
45	+ /**
46	+ * specific HTTP request headers from current request
47	+ *
48	+ * @since 1.7.0
49	+ * @change 1.7.0
50	+ *
51	+ * @var array
52	+ */
53	+
54	+ public static $request_headers;
55	+
56	+
57	/**
58	* engine settings from disk or database
59	*

70	* constructor
71	*
72	* @since 1.5.0
73	+ * @change 1.7.0
74	*/
75
76	public function __construct() {
77
78	+ // get request headers
79	+ self::$request_headers = self::get_request_headers();
80	+
81	// get settings from disk if directory index file
82	if ( self::is_index() ) {
83	self::$settings = Cache_Enabler_Disk::get_settings();

100	* check if engine should start
101	*
102	* @since 1.5.2
103	+ * @change 1.7.0
104	*
105	* @return boolean true if engine should start, false otherwise
106	*/

127	return false;
128	}
129





130	// check request URI
131	if ( str_replace( array( '.ico', '.txt', '.xml', '.xsl' ), '', $_SERVER['REQUEST_URI'] ) !== $_SERVER['REQUEST_URI'] ) {
132	return false;

153	* end output buffering and cache page if applicable
154	*
155	* @since 1.0.0
156	+ * @change 1.7.0
157	*
158	+ * @param string $contents contents from the output buffer
159	+ * @param integer $phase bitmask of PHP_OUTPUT_HANDLER_* constants
160	+ * @return string $contents unchanged contents from the output buffer
161	*/
162
163	+ private static function end_buffering( $contents, $phase ) {
164
165	if ( $phase & PHP_OUTPUT_HANDLER_FINAL \|\| $phase & PHP_OUTPUT_HANDLER_END ) {
166	+ if ( self::is_cacheable( $contents ) && ! self::bypass_cache() ) {
167	+ Cache_Enabler_Disk::cache_page( $contents );
168	}
169	+ }
170
171	+ return $contents;
172	+ }
173

174
175	+ /**
176	+ * get specific HTTP request headers from current request
177	+ *
178	+ * @since 1.7.0
179	+ * @change 1.7.0
180	+ *
181	+ * @return array $request_headers specific HTTP request headers from current request
182	+ */
183
184	+ private static function get_request_headers() {
185	+
186	+ $request_headers = ( function_exists( 'apache_request_headers' ) ) ? apache_request_headers() : array();
187	+
188	+ $request_headers = array(
189	+ 'Accept' => ( isset( $request_headers['Accept'] ) ) ? $request_headers['Accept'] : ( ( isset( $_SERVER[ 'HTTP_ACCEPT' ] ) ) ? $_SERVER[ 'HTTP_ACCEPT' ] : '' ),
190	+ 'Accept-Encoding' => ( isset( $request_headers['Accept-Encoding'] ) ) ? $request_headers['Accept-Encoding'] : ( ( isset( $_SERVER[ 'HTTP_ACCEPT_ENCODING' ] ) ) ? $_SERVER[ 'HTTP_ACCEPT_ENCODING' ] : '' ),
191	+ 'Host' => ( isset( $request_headers['Host'] ) ) ? $request_headers['Host'] : ( ( isset( $_SERVER[ 'HTTP_HOST' ] ) ) ? $_SERVER[ 'HTTP_HOST' ] : '' ),
192	+ 'If-Modified-Since' => ( isset( $request_headers['If-Modified-Since'] ) ) ? $request_headers['If-Modified-Since'] : ( ( isset( $_SERVER[ 'HTTP_IF_MODIFIED_SINCE' ] ) ) ? $_SERVER[ 'HTTP_IF_MODIFIED_SINCE' ] : '' ),
193	+ 'User-Agent' => ( isset( $request_headers['User-Agent'] ) ) ? $request_headers['User-Agent'] : ( ( isset( $_SERVER[ 'HTTP_USER_AGENT' ] ) ) ? $_SERVER[ 'HTTP_USER_AGENT' ] : '' ),
194	+ 'X-Forwarded-Proto' => ( isset( $request_headers['X-Forwarded-Proto'] ) ) ? $request_headers['X-Forwarded-Proto'] : ( ( isset( $_SERVER[ 'HTTP_X_FORWARDED_PROTO' ] ) ) ? $_SERVER[ 'HTTP_X_FORWARDED_PROTO' ] : '' ),
195	+ 'X-Forwarded-Scheme' => ( isset( $request_headers['X-Forwarded-Scheme'] ) ) ? $request_headers['X-Forwarded-Scheme'] : ( ( isset( $_SERVER[ 'HTTP_X_FORWARDED_SCHEME' ] ) ) ? $_SERVER[ 'HTTP_X_FORWARDED_SCHEME' ] : '' ),
196	+ );
197	+
198	+ return $request_headers;
199	}
200
201

219
220
221	/**
222	+ * check if contents from the output buffer can be cached
223	*
224	* @since 1.5.0
225	+ * @change 1.7.0
226	*
227	+ * @param string $contents contents from the output buffer
228	+ * @return boolean true if contents from the output buffer are cacheable, false otherwise
229	*/
230
231	+ private static function is_cacheable( $contents ) {
232
233	+ $has_html_tag = ( stripos( $contents, '<html' ) !== false );
234	+ $has_html5_doctype = preg_match( '/^<!DOCTYPE.+html>/i', ltrim( $contents ) );
235	+ $has_xsl_stylesheet = ( stripos( $contents, '<xsl:stylesheet' ) !== false \|\| stripos( $contents, '<?xml-stylesheet' ) !== false );
236
237	if ( $has_html_tag && $has_html5_doctype && ! $has_xsl_stylesheet ) {
238	return true;

280	* check if page is excluded from cache
281	*
282	* @since 1.5.0
283	+ * @change 1.7.0
284	*
285	* @return boolean true if page is excluded from the cache, false otherwise
286	*/

289
290	// if post ID excluded
291	if ( ! empty( self::$settings['excluded_post_ids'] ) && function_exists( 'is_singular' ) && is_singular() ) {
292	+ $post_id = get_queried_object_id();
293	+ $excluded_post_ids = array_map( 'absint', (array) explode( ',', self::$settings['excluded_post_ids'] ) );
294	+
295	+ if ( in_array( $post_id, $excluded_post_ids, true ) ) {
296	return true;
297	}
298	}

331	$cookies_regex = '/^(wp-postpass\|wordpress_logged_in\|comment_author)_/';
332	}
333	// bypass cache if an excluded cookie is found
334	+ foreach ( $_COOKIE as $key => $value ) {
335	if ( preg_match( $cookies_regex, $key ) ) {
336	return true;
337	}

361	}
362
363















364	/**
365	* check if cache should be bypassed
366	*
367	* @since 1.0.0
368	+ * @change 1.7.0
369	*
370	* @return boolean true if cache should be bypassed, false otherwise
371	*/

404
405	// check conditional tags when output buffering has ended
406	if ( class_exists( 'WP' ) ) {
407	+ if ( is_admin() \|\| self::is_search() \|\| is_feed() \|\| is_trackback() \|\| is_robots() \|\| is_preview() \|\| post_password_required() ) {
408	return true;
409	}
410	}

417	* deliver cache
418	*
419	* @since 1.5.0
420	+ * @change 1.7.0
421	*
422	* @return boolean false if cached page was not delivered
423	*/
424
425	public static function deliver_cache() {
426
427	+ $cache_file = Cache_Enabler_Disk::get_cache_file();
428	+
429	+ if ( Cache_Enabler_Disk::cache_exists( $cache_file ) && ! Cache_Enabler_Disk::cache_expired( $cache_file ) && ! self::bypass_cache() ) {
430	+ // set X-Cache-Handler response header
431	+ header( 'X-Cache-Handler: cache-enabler-engine' );
432	+
433	+ // return 304 Not Modified with empty body if applicable
434	+ if ( strtotime( self::$request_headers['If-Modified-Since'] >= filemtime( $cache_file ) ) ) {
435	+ header( $_SERVER['SERVER_PROTOCOL'] . ' 304 Not Modified', true, 304 );
436	+ exit;
437	+ }
438	+
439	+ // set Content-Encoding response header if applicable
440	+ if ( strpos( basename( $cache_file ), 'gz' ) !== false ) {
441	+ header( 'Content-Encoding: gzip' );
442	+ }
443	+
444	+ // deliver cache
445	+ readfile( $cache_file );
446	exit;
447	}
448

readme.txt CHANGED Viewed

	@@ -2,7 +2,7 @@
2	Contributors: keycdn
3	Tags: cache, caching, performance, gzip, webp, speed
4	Requires at least: 5.1
5	- Tested up to: 5.6
6	Requires PHP: 5.6
7	Stable tag: trunk
8	License: GPLv2 or later
	@@ -13,7 +13,7 @@ A lightweight caching plugin for WordPress that makes your website faster by gen
13
14
15	== Description ==
16	- Cache Enabler is a simple, yet powerful WordPress caching plugin that is easy to use, needs minimal configuration, and best of all helps improve site performance for a faster load time. It creates static HTML files and stores them on the server's disk. This allows the web server to deliver the static HTML files avoiding resource intensive backend processes from the WordPress core, plugins, and database ~~lookups~~.
17
18
19	= Features =
	@@ -25,15 +25,15 @@ Cache Enabler is a simple, yet powerful WordPress caching plugin that is easy to
25	* Cache size display in the WordPress dashboard
26	* Minification of HTML excluding or including inline CSS and JavaScript
27	* WordPress multisite network support
28	- * WebP support (convert images to WebP with [Optimus](https://optimus.io ~~"Optimus"~~))
29	* Gzip pre-compression support
30	* Custom post type support
31	* `304 Not Modified` support
32	- * Works perfectly with [Autoptimize](https://wordpress.org/plugins/autoptimize/) and the majority of third party plugins
33
34
35	= How does the caching work? =
36	- Cache Enabler captures page contents and saves it as a static HTML file on the server’s disk. Converting inline image URLs to WebP as a separate static HTML file and pre-compressing both static HTML files with Gzip is possible. The accepted static HTML file is then delivered to users without any database ~~lookups~~ or on the fly compression for a faster site load time.
37
38
39	= Documentation =
	@@ -46,7 +46,7 @@ Cache Enabler captures page contents and saves it as a static HTML file on the s
46
47
48	= Want to help? =
49	- * Want to file a bug, contribute some code, or improve translations? Excellent! Check out our [GitHub issues](https://github.com/keycdn/cache-enabler) or [translations](https://translate.wordpress.org/projects/wp-plugins/cache-enabler/).
50
51
52	= Maintainer =
	@@ -55,6 +55,19 @@ Cache Enabler captures page contents and saves it as a static HTML file on the s
55
56	== Changelog ==
57













58	= 1.6.2 =
59	* Fix removing CSS and JavaScript comments during HTML minification (#188)
60


2	Contributors: keycdn
3	Tags: cache, caching, performance, gzip, webp, speed
4	Requires at least: 5.1
5	+ Tested up to: 5.7
6	Requires PHP: 5.6
7	Stable tag: trunk
8	License: GPLv2 or later

13
14
15	== Description ==
16	+ Cache Enabler is a simple, yet powerful WordPress caching plugin that is easy to use, needs minimal configuration, and best of all helps improve site performance for a faster load time. It creates static HTML files and stores them on the server's disk. This allows the web server to deliver the static HTML files avoiding resource intensive backend processes from the WordPress core, plugins, and database.
17
18
19	= Features =

25	* Cache size display in the WordPress dashboard
26	* Minification of HTML excluding or including inline CSS and JavaScript
27	* WordPress multisite network support
28	+ * WebP support (convert images to WebP with [Optimus](https://optimus.io))
29	* Gzip pre-compression support
30	* Custom post type support
31	* `304 Not Modified` support
32	+ * Works perfectly with [Autoptimize](https://wordpress.org/plugins/autoptimize/) and the majority of other third party plugins
33
34
35	= How does the caching work? =
36	+ Cache Enabler captures page contents and saves it as a static HTML file on the server’s disk. Converting inline image URLs to WebP as a separate static HTML file and pre-compressing both static HTML files with Gzip is possible. The accepted static HTML file is then delivered to users without any database queries or on the fly compression for a faster site load time.
37
38
39	= Documentation =

46
47
48	= Want to help? =
49	+ * Want to file a bug, contribute some code, or improve translations? Excellent! Check out our [GitHub issues](https://github.com/keycdn/cache-enabler/issues) or [translations](https://translate.wordpress.org/projects/wp-plugins/cache-enabler/).
50
51
52	= Maintainer =

55
56	== Changelog ==
57
58	+ = 1.7.0 =
59	+ * Update cache clearing for theme, plugin, post, and upgrade actions (#215 and #216)
60	+ * Update cache handling with cache keys (#211)
61	+ * Update settings file deletion handling (#205)
62	+ * Update output buffer handling (#203)
63	+ * Update removing CSS and JavaScript comments during HTML minification (#202)
64	+ * Update WebP URL conversion for installations in a subdirectory (#198)
65	+ * Add `CACHE_ENABLER_DIR` as definable plugin directory constant (#195 @stevegrunwell)
66	+ * Add explicit directory access permissions (#194 @stevegrunwell)
67	+ * Add exclusive lock when writing files (#191 @nawawi)
68	+ * Fix clear cache request handling (#212)
69	+ * Fix getting `wp-config.php` (#210 @stevegrunwell)
70	+
71	= 1.6.2 =
72	* Fix removing CSS and JavaScript comments during HTML minification (#188)
73

Cache Enabler – WordPress Cache - Version 1.7.0

Version Description

Release Info

Code changes from version 1.6.2 to 1.7.0