wp-optimize / cache / file-based-page-cache.php

file-based-page-cache.php in WP-Optimize – Cache, Compress images, Minify & Clean database to boost page speed & performance 3.2.21, at cache/file-based-page-cache.php

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1	<?php
2
3	if (!defined('ABSPATH')) die('No direct access allowed');
4
5	/**
6	* File based page cache drop in
7	*/
8	require_once(dirname(__FILE__) . '/file-based-page-cache-functions.php');
9
10	if (!defined('WPO_CACHE_DIR')) define('WPO_CACHE_DIR', untrailingslashit(WP_CONTENT_DIR) . '/wpo-cache');
11
12	/**
13	* Load extensions.
14	*/
15	wpo_cache_load_extensions();
16
17	/**
18	* Action triggered when the cache extensions are all loaded. Allows to execute code depending on an other extension, without knowing the order in which the files are loaded.
19	*/
20	if (function_exists('do_action')) {
21	do_action('wpo_cache_extensions_loaded');
22	}
23
24	$no_cache_because = array();
25
26	// check if we want to cache current page.
27	if (function_exists('add_filter') && function_exists('apply_filters')) {
28	add_filter('wpo_restricted_cache_page_type', 'wpo_restricted_cache_page_type');
29	add_filter('wpo_url_in_conditional_tags_exceptions', 'wpo_url_in_conditional_tags_exceptions');
30	$restricted_cache_page_type = apply_filters('wpo_restricted_cache_page_type', false);
31	$conditional_tag_exceptions = wpo_url_in_conditional_tags_exceptions();
32	} else {
33	// On old WP versions, you can't filter the result
34	$restricted_cache_page_type = wpo_restricted_cache_page_type(false);
35	$conditional_tag_exceptions = wpo_url_in_conditional_tags_exceptions();
36	}
37
38	if ($restricted_cache_page_type) {
39	$no_cache_because[] = $restricted_cache_page_type;
40	}
41
42	if ($conditional_tag_exceptions) {
43	$no_cache_because[] = $conditional_tag_exceptions;
44	}
45
46	// Don't cache non-GET requests.
47	if (!isset($_SERVER['REQUEST_METHOD']) \|\| 'GET' !== $_SERVER['REQUEST_METHOD']) {
48	$no_cache_because[] = 'The request method was not GET ('.(isset($_SERVER['REQUEST_METHOD']) ? $_SERVER['REQUEST_METHOD'] : '-').')';
49	}
50
51	$file_extension = $_SERVER['REQUEST_URI'];
52	$file_extension = preg_replace('#^(.?)\?.$#', '$1', $file_extension);
53	$file_extension = trim(preg_replace('#^.\.(.)$#', '$1', $file_extension));
54
55	// Don't cache disallowed extensions. Prevents wp-cron.php, xmlrpc.php, etc.
56	if (!preg_match('#index\.php$#i', $_SERVER['REQUEST_URI']) && !preg_match('#sitemap([a-zA-Z0-9_-]+)?\.xml$#i', $_SERVER['REQUEST_URI']) && in_array($file_extension, array('php', 'xml', 'xsl'))) {
57	$no_cache_because[] = 'The request extension is not suitable for caching';
58	}
59
60	// Don't cache if logged in.
61	if (!empty($_COOKIE)) {
62	$wp_cookies = array('wordpressuser_', 'wordpresspass_', 'wordpress_sec_', 'wordpress_logged_in_');
63
64	if (!wpo_cache_loggedin_users()) {
65	foreach ($_COOKIE as $key => $value) {
66	foreach ($wp_cookies as $cookie) {
67	if (false !== strpos($key, $cookie)) {
68	$no_cache_because[] = 'WordPress login cookies were detected';
69	break(2);
70	}
71	}
72	}
73	}
74
75	if (!empty($_COOKIE['wpo_commented_post'])) {
76	$no_cache_because[] = 'The user has commented on a post (comment cookie set)';
77	}
78
79	// get cookie exceptions from options.
80	$cache_exception_cookies = !empty($GLOBALS['wpo_cache_config']['cache_exception_cookies']) ? $GLOBALS['wpo_cache_config']['cache_exception_cookies'] : array();
81	// filter cookie exceptions, since WP 4.6
82	$cache_exception_cookies = function_exists('apply_filters') ? apply_filters('wpo_cache_exception_cookies', $cache_exception_cookies) : $cache_exception_cookies;
83
84	// check if any cookie exists from exception list.
85	if (!empty($cache_exception_cookies)) {
86	foreach ($_COOKIE as $key => $value) {
87	foreach ($cache_exception_cookies as $cookie) {
88	if ('' != trim($cookie) && false !== strpos($key, $cookie)) {
89	$no_cache_because[] = 'An excepted cookie was set ('.$key.')';
90	break 2;
91	}
92	}
93	}
94	}
95	}
96
97	// check in not disabled current user agent
98	if (!empty($_SERVER['HTTP_USER_AGENT']) && false === wpo_is_accepted_user_agent($_SERVER['HTTP_USER_AGENT'])) {
99	$no_cache_because[] = "In the settings, caching is disabled for matches for this request's user agent";
100	}
101
102	// Deal with optional cache exceptions.
103	if (wpo_url_in_exceptions(wpo_current_url())) {
104	$no_cache_because[] = 'In the settings, caching is disabled for matches for the current URL';
105	}
106
107	if (!empty($_GET)) {
108	// get variables used for building filename.
109	$get_variable_names = wpo_cache_query_variables();
110
111	$get_variables = wpo_cache_maybe_ignore_query_variables(array_keys($_GET));
112
113	// if GET variables include one or more undefined variable names then we don't cache.
114	$get_variables_diff = array_diff($get_variables, $get_variable_names);
115	if (!empty($get_variables_diff)) {
116	$no_cache_because[] = "In the settings, caching is disabled for matches for one of the current request's GET parameters";
117	}
118	}
119
120	if (!empty($no_cache_because)) {
121	$no_cache_because_message = implode(', ', $no_cache_because);
122
123	// Add http header
124	if (!defined('DOING_CRON') \|\| !DOING_CRON) {
125	wpo_cache_add_nocache_http_header($no_cache_because_message);
126	}
127
128	// Only output if the user has turned on debugging output
129	if (((defined('WP_DEBUG') && WP_DEBUG) \|\| isset($_GET['wpo_cache_debug'])) && (!defined('DOING_CRON') \|\| !DOING_CRON)) {
130	wpo_cache_add_footer_output("Page not served from cache because: ".htmlspecialchars($no_cache_because_message));
131	}
132	return;
133	}
134
135	wpo_serve_cache();
136
137	ob_start('wpo_cache');
138