wp-cache-phase2.php — WP Super Cache 0.9.9.4

wp-super-cache / wp-cache-phase2.php

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wp-cache-phase2.php

1028 lines

1	<?php
2
3	function wp_cache_phase2() {
4	global $wpsc_settings;
5	global $cache_filename, $cache_acceptable_files, $wp_cache_gzip_encoding, $super_cache_enabled, $cache_rebuild_files, $wp_cache_last_gc;
6	global $cache_max_time, $wp_cache_request_uri, $super_cache_enabled, $wp_cache_object_cache;
7	global $cache_enabled;
8
9	if ( $cache_enabled == false )
10	return false;
11
12	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'In WP Cache Phase 2', 5 );
13
14	$wpsc_settings[ 'wp_cache_gmt_offset' ] = get_option( 'gmt_offset' ); // caching for later use when wpdb is gone. http://wordpress.org/support/topic/224349
15	$wpsc_settings[ 'wp_cache_blog_charset' ] = get_option( 'blog_charset' );
16
17	wp_cache_mutex_init();
18	if(function_exists('add_action') && ( !defined( 'WPLOCKDOWN' ) \|\| ( defined( 'WPLOCKDOWN' ) && constant( 'WPLOCKDOWN' ) == '0' ) ) ) {
19	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Setting up WordPress actions', 5 );
20	// Post ID is received
21	add_action('publish_post', 'wp_cache_post_edit', 0);
22	add_action('edit_post', 'wp_cache_post_change', 0); // leaving a comment called edit_post
23	add_action('delete_post', 'wp_cache_post_edit', 0);
24	add_action('publish_phone', 'wp_cache_post_edit', 0);
25	// Coment ID is received
26	add_action('trackback_post', 'wp_cache_get_postid_from_comment', 99);
27	add_action('pingback_post', 'wp_cache_get_postid_from_comment', 99);
28	add_action('comment_post', 'wp_cache_get_postid_from_comment', 99);
29	add_action('edit_comment', 'wp_cache_get_postid_from_comment', 99);
30	add_action('wp_set_comment_status', 'wp_cache_get_postid_from_comment', 99, 2);
31	// No post_id is available
32	add_action('switch_theme', 'wp_cache_no_postid', 99);
33	add_action('edit_user_profile_update', 'wp_cache_no_postid', 99);
34
35	add_action( 'wp_update_nav_menu', 'wp_cache_clear_cache' );
36
37	add_action('wp_cache_gc','wp_cache_gc_cron');
38
39	do_cacheaction( 'add_cacheaction' );
40	}
41
42	if ( is_admin() ) {
43	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching wp-admin requests.', 5 );
44	return false;
45	}
46
47	if ( $_SERVER["REQUEST_METHOD"] == 'POST' \|\| !empty( $_POST ) \|\| get_option( 'gzipcompression' ) ) {
48	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching POST request.', 5 );
49	return false;
50	}
51
52	if ( $wp_cache_object_cache && !empty( $_GET ) ) {
53	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching GET request while object cache storage enabled.', 5 );
54	return false;
55	}
56
57	if ( isset( $_GET[ 'preview' ] ) ) {
58	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching preview post.', 2 );
59	return false;
60	}
61
62	if ( !empty( $_GET ) ) {
63	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Supercache caching disabled. Only using wp-cache. Non empty GET request.', 5 );
64	$super_cache_enabled = false;
65	}
66
67	$script = basename($_SERVER['PHP_SELF']);
68	if (!in_array($script, $cache_acceptable_files) && wp_cache_is_rejected($wp_cache_request_uri)) {
69	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'URI rejected. Not Caching', 2 );
70	return false;
71	}
72	if (wp_cache_user_agent_is_rejected()) {
73	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "USER AGENT ({$_SERVER[ 'HTTP_USER_AGENT' ]}) rejected. Not Caching", 4 );
74	return;
75	}
76	if($wp_cache_gzip_encoding)
77	header('Vary: Accept-Encoding, Cookie');
78	else
79	header('Vary: Cookie');
80	ob_start( 'wp_cache_ob_callback' );
81	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Created output buffer', 4 );
82
83	// restore old supercache file temporarily
84	if( $super_cache_enabled && $cache_rebuild_files ) {
85	$user_info = wp_cache_get_cookies_values();
86	$do_cache = apply_filters( 'do_createsupercache', $user_info );
87	if( $user_info == '' \|\| $do_cache === true ) {
88	$dir = get_current_url_supercache_dir();
89	$files_to_check = array( $dir . 'index.html', $dir . 'index.html.gz' );
90	foreach( $files_to_check as $cache_file ) {
91	if( !@file_exists( $cache_file . '.needs-rebuild' ) )
92	continue;
93	$mtime = @filemtime($cache_file . '.needs-rebuild');
94	if( $mtime && (time() - $mtime) < 30 ) {
95	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Rebuild file renamed to cache file temporarily", 3 );
96	@rename( $cache_file . '.needs-rebuild', $cache_file );
97	}
98	// cleanup old files or if rename fails
99	if( @file_exists( $cache_file . '.needs-rebuild' ) ) {
100	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Rebuild file deleted", 3 );
101	@unlink( $cache_file . '.needs-rebuild' );
102	}
103	}
104	}
105	}
106
107	if ( $cache_max_time == 0 )
108	return false;
109	if( !isset( $cache_max_time ) )
110	$cache_max_time = 600;
111	$last_gc = get_option( "wpsupercache_gc_time" );
112
113	if( !$last_gc ) {
114	update_option( 'wpsupercache_gc_time', time() );
115	}
116	$next_gc = $cache_max_time < 1800 ? $cache_max_time : 600;
117	if( $last_gc < ( time() - $next_gc ) ) {
118	update_option( 'wpsupercache_gc_time', time() );
119
120	global $wp_cache_shutdown_gc;
121	if( !isset( $wp_cache_shutdown_gc ) \|\| $wp_cache_shutdown_gc == 0 ) {
122	if(!wp_next_scheduled('wp_cache_gc')) {
123	wp_schedule_single_event(time() + 10 , 'wp_cache_gc');
124	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'scheduled wp_cache_gc for 10 seconds time.', 5 );
125	}
126	} else {
127	global $time_to_gc_cache;
128	$time_to_gc_cache = 1; // tell the "shutdown gc" to run!
129	}
130	}
131	}
132
133	function wpcache_logged_in_message() {
134	echo '<!-- WP Super Cache did not cache this page because you are logged in and "Don\'t cache pages for logged in users" is enabled. -->';
135	}
136
137	if ( !function_exists( 'wp_cache_user_agent_is_rejected' ) ) {
138	function wp_cache_user_agent_is_rejected() {
139	global $cache_rejected_user_agent;
140
141	if (!function_exists('apache_request_headers')) return false;
142	$headers = apache_request_headers();
143	if (!isset($headers["User-Agent"])) return false;
144	foreach ($cache_rejected_user_agent as $expr) {
145	if (strlen($expr) > 0 && stristr($headers["User-Agent"], $expr))
146	return true;
147	}
148	return false;
149	}
150	}
151
152	function wp_cache_get_response_headers() {
153	if(function_exists('apache_response_headers')) {
154	flush();
155	$headers = apache_response_headers();
156	} else if(function_exists('headers_list')) {
157	$headers = array();
158	foreach(headers_list() as $hdr) {
159	list($header_name, $header_value) = explode(': ', $hdr, 2);
160	$headers[$header_name] = $header_value;
161	}
162	} else
163	$headers = null;
164
165	return $headers;
166	}
167
168	function wp_cache_is_rejected($uri) {
169	global $cache_rejected_uri;
170
171	$auto_rejected = array( '/wp-admin/', 'xmlrpc.php', 'wp-app.php' );
172	foreach( $auto_rejected as $u ) {
173	if( strstr( $uri, $u ) )
174	return true; // we don't allow caching of wp-admin for security reasons
175	}
176	foreach ( $cache_rejected_uri as $expr ) {
177	if( $expr != '' && preg_match( "~$expr~", $uri ) )
178	return true;
179	}
180	return false;
181	}
182
183	function wp_cache_mutex_init() {
184	global $wpsc_settings, $mutex;
185
186	if( isset( $wpsc_settings[ 'wp_cache_mutex_disabled' ] ) && $wpsc_settings[ 'wp_cache_mutex_disabled' ] )
187	return true;
188
189	if( !is_bool( $wpsc_settings[ 'use_flock' ] ) ) {
190	if(function_exists('sem_get'))
191	$wpsc_settings[ 'use_flock' ] = false;
192	else
193	$wpsc_settings[ 'use_flock' ] = true;
194	}
195
196	$mutex = false;
197	if ($wpsc_settings[ 'use_flock' ] ) {
198	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Created mutex lock on filename: {$wpsc_settings[ 'blog_cache_dir' ]}{$wpsc_settings[ 'mutex_filename' ]}", 5 );
199	$mutex = @fopen( $wpsc_settings[ 'blog_cache_dir' ] . $wpsc_settings[ 'mutex_filename' ], 'w' );
200	} else {
201	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Created mutex lock on semaphore: {$wpsc_settings[ 'sem_id' ]}", 5 );
202	$mutex = @sem_get( $wpsc_settings[ 'sem_id' ], 1, 0644 \| IPC_CREAT, 1 );
203	}
204	}
205
206	function wp_cache_writers_entry() {
207	global $wpsc_settings, $mutex;
208
209	if( isset( $wpsc_settings[ 'wp_cache_mutex_disabled' ] ) && $wpsc_settings[ 'wp_cache_mutex_disabled' ] )
210	return true;
211
212	if( !$mutex ) {
213	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "(writers entry) mutex lock not created. not caching.", 2 );
214	return false;
215	}
216
217	if ( $wpsc_settings[ 'use_flock' ] ) {
218	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "grabbing lock using flock()", 5 );
219	flock($mutex, LOCK_EX);
220	} else {
221	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "grabbing lock using sem_acquire()", 5 );
222	sem_acquire($mutex);
223	}
224
225	return true;
226	}
227
228	function wp_cache_writers_exit() {
229	global $wpsc_settings, $mutex;
230
231	if( isset( $wpsc_settings[ 'wp_cache_mutex_disabled' ] ) && $wpsc_settings[ 'wp_cache_mutex_disabled' ] )
232	return true;
233
234	if( !$mutex ) {
235	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "(writers exit) mutex lock not created. not caching.", 2 );
236	return false;
237	}
238
239	if ( $wpsc_settings[ 'use_flock' ] ) {
240	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "releasing lock using flock()", 5 );
241	flock($mutex, LOCK_UN);
242	} else {
243	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "releasing lock using sem_release()", 5 );
244	sem_release($mutex);
245	}
246	}
247
248	function wp_cache_ob_callback( $buffer ) {
249	global $wp_cache_pages;
250	if( defined( 'DONOTCACHEPAGE' ) ) {
251	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'DONOTCACHEPAGE defined. Caching disabled.', 2 );
252	return $buffer;
253	}
254
255	if ( isset( $wp_cache_pages[ 'single' ] ) && $wp_cache_pages[ 'single' ] == 1 && is_single() ) {
256	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching single post.', 2 );
257	return $buffer;
258	} elseif ( isset( $wp_cache_pages[ 'pages' ] ) && $wp_cache_pages[ 'pages' ] == 1 && is_page() ) {
259	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching single page.', 2 );
260	return $buffer;
261	} elseif ( isset( $wp_cache_pages[ 'archives' ] ) && $wp_cache_pages[ 'archives' ] == 1 && is_archive() ) {
262	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching archive page.', 2 );
263	return $buffer;
264	} elseif ( isset( $wp_cache_pages[ 'tag' ] ) && $wp_cache_pages[ 'tag' ] == 1 && is_tag() ) {
265	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching tag page.', 2 );
266	return $buffer;
267	} elseif ( isset( $wp_cache_pages[ 'category' ] ) && $wp_cache_pages[ 'category' ] == 1 && is_category() ) {
268	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching category page.', 2 );
269	return $buffer;
270	} elseif ( isset( $wp_cache_pages[ 'frontpage' ] ) && $wp_cache_pages[ 'frontpage' ] == 1 && is_front_page() ) {
271	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching front page.', 2 );
272	return $buffer;
273	} elseif ( isset( $wp_cache_pages[ 'home' ] ) && $wp_cache_pages[ 'home' ] == 1 && is_home() ) {
274	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching home page.', 2 );
275	return $buffer;
276	} elseif ( isset( $wp_cache_pages[ 'search' ] ) && $wp_cache_pages[ 'search' ] == 1 && is_search() ) {
277	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching search page.', 2 );
278	return $buffer;
279	} elseif ( isset( $wp_cache_pages[ 'feed' ] ) && $wp_cache_pages[ 'feed' ] == 1 && is_feed() ) {
280	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching feed.', 2 );
281	return $buffer;
282	}
283
284	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Output buffer callback', 4 );
285
286	$buffer = &wp_cache_get_ob( $buffer );
287	wp_cache_shutdown_callback();
288	return $buffer;
289	}
290
291	function wp_cache_append_tag( &$buffer ) {
292	global $wpsc_settings;
293	global $cache_enabled, $super_cache_enabled;
294	$timestamp = gmdate('Y-m-d H:i:s', (time() + ( $wpsc_settings[ 'wp_cache_gmt_offset' ] * 3600)));
295	if ( $cache_enabled \|\| $super_cache_enabled ) {
296	$buffer .= "<!-- Cached page generated by WP-Super-Cache on $timestamp -->\n";
297	} else {
298	$buffer .= "<!-- Live page served on $timestamp -->\n";
299	}
300	}
301
302	function wp_cache_get_ob(&$buffer) {
303	global $wpsc_settings;
304	global $cache_enabled, $cache_path, $cache_filename, $meta_file, $wp_start_time, $supercachedir;
305	global $new_cache, $wp_cache_meta, $file_expired, $blog_id, $cache_compression;
306	global $wp_cache_gzip_encoding, $super_cache_enabled, $cached_direct_pages;
307	global $wp_cache_404, $gzsize, $supercacheonly;
308	global $blog_cache_dir, $wp_cache_request_uri, $wp_supercache_cache_list;
309	global $wp_cache_not_logged_in, $wp_cache_object_cache, $cache_max_time;
310
311	$new_cache = true;
312	$wp_cache_meta = '';
313
314	/* Mode paranoic, check for closing tags
315	* we avoid caching incomplete files */
316	if ( $buffer == '' ) {
317	$new_cache = false;
318	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) {
319	wp_cache_debug( "Buffer is blank. Output buffer may have been corrupted by another plugin or this is a redirected URL. Look for text 'ob_start' in the files of your plugins directory.", 2 );
320	$buffer .= "\n<!-- Page not cached by WP Super Cache. Blank Page. Check output buffer usage by plugins. -->\n";
321	}
322	}
323
324	if ( $wp_cache_404 && false == apply_filters( 'wpsupercache_404', false ) ) {
325	$new_cache = false;
326	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) {
327	wp_cache_debug( "404 file not found not cached", 2 );
328	$buffer .= "\n<!-- Page not cached by WP Super Cache. 404. -->\n";
329	}
330	}
331
332	if (!preg_match('/(<\/html>\|<\/rss>\|<\/feed>\|<\/urlset)/i',$buffer) ) {
333	$new_cache = false;
334	if( false === strpos( $_SERVER[ 'REQUEST_URI' ], 'robots.txt' ) ) {
335	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) {
336	wp_cache_debug( "No closing html tag. Not caching.", 2 );
337	$buffer .= "\n<!-- Page not cached by WP Super Cache. No closing HTML tag. Check your theme. -->\n";
338	}
339	} else {
340	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "robots.txt detected. Not caching.", 2 );
341	}
342	}
343
344	if( !$new_cache )
345	return $buffer;
346
347	$duration = wp_cache_microtime_diff($wp_start_time, microtime());
348	$duration = sprintf("%0.3f", $duration);
349	$buffer .= "\n<!-- Dynamic page generated in $duration seconds. -->\n";
350
351	if( !wp_cache_writers_entry() ) {
352	$buffer .= "\n<!-- Page not cached by WP Super Cache. Could not get mutex lock. -->\n";
353	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Could not get mutex lock. Not caching.", 1 );
354	return $buffer;
355	}
356
357	$dir = get_current_url_supercache_dir();
358	$supercachedir = $cache_path . 'supercache/' . preg_replace('/:.*$/', '', $_SERVER["HTTP_HOST"]);
359	if( !empty( $_GET ) \|\| is_feed() \|\| ( $super_cache_enabled == true && is_dir( substr( $supercachedir, 0, -1 ) . '.disabled' ) ) ) {
360	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Supercache disabled: GET or feed detected or disabled by config.", 2 );
361	$super_cache_enabled = false;
362	}
363
364	$tmp_wpcache_filename = $cache_path . uniqid( mt_rand(), true ) . '.tmp';
365
366	$supercacheonly = false;
367	if( $super_cache_enabled ) {
368	if ( wp_cache_get_cookies_values() == '' ) {
369	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Anonymous user detected. Only creating Supercache file.", 3 );
370	$supercacheonly = true;
371	}
372	}
373
374	if ( $wp_cache_not_logged_in && wp_cache_get_cookies_values() != '' ) {
375	$super_cache_enabled = false;
376	$cache_enabled = false;
377	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching for known user.', 5 );
378	}
379
380	if ( $wp_cache_object_cache ) { // half on mode when using the object cache
381	if ( wp_cache_get_cookies_values() != '' ) {
382	$cache_enabled = false;
383	}
384	$super_cache_enabled = false;
385	$supercacheonly = false;
386	wp_cache_init(); // PHP5 destroys objects during shutdown
387	}
388
389	if ( $cache_enabled ) {
390	// Open wp-cache cache file
391	if ( !$supercacheonly && ( !@file_exists( $blog_cache_dir . $cache_filename ) \|\| ( @file_exists( $blog_cache_dir . $cache_filename ) && ( time() - @filemtime( $blog_cache_dir . $cache_filename ) ) > 5 ) ) ) {
392	if ( false == $wp_cache_object_cache ) {
393	$fr = @fopen($tmp_wpcache_filename, 'w');
394	if (!$fr) {
395	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Error. Supercache could not write to " . str_replace( ABSPATH, '', $cache_path ) . $cache_filename, 1 );
396	$buffer .= "<!-- File not cached! Super Cache Couldn't write to: " . str_replace( ABSPATH, '', $cache_path ) . $cache_filename . " -->\n";
397	wp_cache_writers_exit();
398	return $buffer;
399	}
400	}
401	}
402	$user_info = wp_cache_get_cookies_values();
403	$do_cache = apply_filters( 'do_createsupercache', $user_info );
404	if ( $super_cache_enabled && ( $user_info == '' \|\| $do_cache === true ) ) {
405
406	if( @is_dir( $dir ) == false )
407	@wp_mkdir_p( $dir );
408
409	$cache_fname = "{$dir}index.html";
410	$tmp_cache_filename = $dir . uniqid( mt_rand(), true ) . '.tmp';
411	if ( !@file_exists( $cache_fname ) \|\| ( @file_exists( $cache_fname ) && ( time() - @filemtime( $cache_fname ) ) > 5 ) ) {
412	$fr2 = @fopen( $tmp_cache_filename, 'w' );
413	if (!$fr2) {
414	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Error. Supercache could not write to " . str_replace( ABSPATH, '', $tmp_cache_filename ), 1 );
415	$buffer .= "<!-- File not cached! Super Cache Couldn't write to: " . str_replace( ABSPATH, '', $tmp_cache_filename ) . " -->\n";
416	@fclose( $fr );
417	@unlink( $tmp_wpcache_filename );
418	wp_cache_writers_exit();
419	return $buffer;
420	} elseif ( $cache_compression ) {
421	$gz = @fopen( $tmp_cache_filename . ".gz", 'w');
422	if (!$gz) {
423	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Error. Supercache could not write to " . str_replace( ABSPATH, '', $tmp_cache_filename ) . ".gz", 1 );
424	$buffer .= "<!-- File not cached! Super Cache Couldn't write to: " . str_replace( ABSPATH, '', $tmp_cache_filename ) . ".gz -->\n";
425	@fclose( $fr );
426	@unlink( $tmp_wpcache_filename );
427	@fclose( $fr2 );
428	@unlink( $tmp_cache_filename );
429	wp_cache_writers_exit();
430	return $buffer;
431	}
432	}
433	}
434	}
435	}
436
437	$added_cache = 0;
438	$oc_key = get_oc_key();
439	if ( preg_match('/<!--mclude\|<!--mfunc/', $buffer)) { //Dynamic content
440	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Dynamic content found in buffer.", 4 );
441	$store = preg_replace('\|<!--mclude (.?)-->(.?)<!--/mclude-->\|is',
442	"<!--mclude-->\n<?php include_once('" . ABSPATH . "$1'); ?>\n<!--/mclude-->", $buffer);
443	$store = preg_replace('\|<!--mfunc (.?)-->(.?)<!--/mfunc-->\|is',
444	"<!--mfunc-->\n<?php $1 ;?>\n<!--/mfunc-->", $store);
445	$wp_cache_meta[ 'dynamic' ] = true;
446	/* Clean function calls in tag */
447	$buffer = preg_replace('\|<!--mclude (.*?)-->\|is', '<!--mclude-->', $buffer);
448	$buffer = preg_replace('\|<!--mfunc (.*?)-->\|is', '<!--mfunc-->', $buffer);
449	$store = apply_filters( 'wpsupercache_buffer', $store );
450	// Append WP Super Cache or Live page comment tag
451	wp_cache_append_tag($buffer);
452	global $wp_super_cache_late_init;
453	if ( false == isset( $wp_super_cache_late_init ) \|\| ( isset( $wp_super_cache_late_init ) && $wp_super_cache_late_init == 0 ) )
454	$buffer .= '<!-- Super Cache dynamic page detected but $wp_super_cache_late_init not set. See the readme.txt for further details. -->';
455
456	if ( false == $wp_cache_object_cache ) {
457	if( $fr )
458	fputs($fr, $store);
459	} else {
460	wp_cache_set( $oc_key, $store, 'supercache', $cache_max_time );
461	}
462	} else {
463	$buffer = apply_filters( 'wpsupercache_buffer', $buffer );
464	// Append WP Super Cache or Live page comment tag
465	wp_cache_append_tag($buffer);
466	if( $gz \|\| $wp_cache_gzip_encoding ) {
467	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Gzipping buffer.", 5 );
468	$gzdata = gzencode( $buffer . "<!-- Compression = gzip -->", 3, FORCE_GZIP );
469	$gzsize = strlen($gzdata);
470	}
471	if ($wp_cache_gzip_encoding) {
472	$wp_cache_meta[ 'headers' ][ 'Content-Encoding' ] = 'Content-Encoding: ' . $wp_cache_gzip_encoding;
473	$wp_cache_meta[ 'headers' ][ 'Vary' ] = 'Vary: Accept-Encoding, Cookie';
474	// Return uncompressed data & store compressed for later use
475	if ( false == $wp_cache_object_cache ) {
476	if( $fr ) {
477	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Writing gzipped buffer to wp-cache cache file.", 5 );
478	fputs($fr, $gzdata);
479	}
480	} elseif ( $cache_enabled ) {
481	wp_cache_set( $oc_key . ".gz", $gzdata, 'supercache', $cache_max_time );
482	$added_cache = 1;
483	}
484	} else { // no compression
485	$wp_cache_meta[ 'headers' ][ 'Vary' ] = 'Vary: Cookie';
486	if ( false == $wp_cache_object_cache ) {
487	if( $fr ) {
488	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Writing non-gzipped buffer to wp-cache cache file.", 5 );
489	fputs($fr, $buffer);
490	}
491	} elseif ( $cache_enabled ) {
492	wp_cache_set( $oc_key, $buffer, 'supercache', $cache_max_time );
493	$added_cache = 1;
494	}
495	}
496	if ( false == $wp_cache_object_cache ) {
497	if( $fr2 ) {
498	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Writing non-gzipped buffer to supercache file.", 5 );
499	fputs($fr2, $buffer . '<!-- super cache -->' );
500	}
501	if( $gz ) {
502	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Writing gzipped buffer to supercache file.", 5 );
503	fwrite($gz, $gzdata );
504	}
505	}
506	}
507	$new_cache = true;
508	if ( false == $wp_cache_object_cache ) {
509	if( $fr ) {
510	$supercacheonly = false;
511	fclose($fr);
512	if ( filesize( $tmp_wpcache_filename ) == 0 ) {
513	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Warning! The file $tmp_wpcache_filename was empty. Did not rename to {$blog_cache_dir}{$cache_filename}", 5 );
514	@unlink( $tmp_wpcache_filename );
515	} else {
516	if ( !rename( $tmp_wpcache_filename, $blog_cache_dir . $cache_filename ) ) {
517	unlink( $blog_cache_dir . $cache_filename );
518	rename( $tmp_wpcache_filename, $blog_cache_dir . $cache_filename );
519	}
520	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Renamed temp wp-cache file to {$blog_cache_dir}$cache_filename", 5 );
521	$added_cache = 1;
522	}
523	}
524	if( $fr2 ) {
525	fclose($fr2);
526	if ( filesize( $tmp_cache_filename ) == 0 ) {
527	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Warning! The file $tmp_cache_filename was empty. Did not rename to {$cache_fname}", 5 );
528	@unlink( $tmp_cache_filename );
529	} else {
530	if ( !@rename( $tmp_cache_filename, $cache_fname ) ) {
531	@unlink( $cache_fname );
532	@rename( $tmp_cache_filename, $cache_fname );
533	}
534	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Renamed temp supercache file to $cache_fname", 5 );
535	$added_cache = 1;
536	}
537	}
538	if( $gz ) {
539	fclose($gz);
540	if ( filesize( $tmp_cache_filename . '.gz' ) == 0 ) {
541	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Warning! The file {$tmp_cache_filename}.gz was empty. Did not rename to {$cache_fname}.gz", 5 );
542	@unlink( $tmp_cache_filename . '.gz' );
543	} else {
544	if ( !@rename( $tmp_cache_filename . '.gz', $cache_fname . '.gz' ) ) {
545	@unlink( $cache_fname . '.gz' );
546	@rename( $tmp_cache_filename . '.gz', $cache_fname . '.gz' );
547	}
548	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Renamed temp supercache gz file to {$cache_fname}.gz", 5 );
549	$added_cache = 1;
550	}
551	}
552	}
553	if ( $added_cache && isset( $wp_supercache_cache_list ) && $wp_supercache_cache_list ) {
554	update_option( 'wpsupercache_count', ( get_option( 'wpsupercache_count' ) + 1 ) );
555	$last_urls = (array)get_option( 'supercache_last_cached' );
556	if ( count( $last_urls ) >= 10 )
557	$last_urls = array_slice( $last_urls, 1, 9 );
558	$last_urls[] = array( 'url' => $_SERVER[ 'REQUEST_URI' ], 'date' => date( 'Y-m-d H:i:s' ) );
559	update_option( 'supercache_last_cached', $last_urls );
560	}
561	wp_cache_writers_exit();
562	if ( !headers_sent() && $wp_cache_gzip_encoding && $gzdata) {
563	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Writing gzip content headers. Sending buffer to browser", 5 );
564	header( 'Content-Encoding: ' . $wp_cache_gzip_encoding );
565	header( 'Vary: Accept-Encoding, Cookie' );
566	header( 'Content-Length: ' . $gzsize );
567	return $gzdata;
568	} else {
569	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Sending buffer to browser", 5 );
570	return $buffer;
571	}
572	}
573
574	function wp_cache_phase2_clean_cache($file_prefix) {
575	global $cache_path, $blog_cache_dir;
576
577	if( !wp_cache_writers_entry() )
578	return false;
579	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Cleaning cache in $blog_cache_dir", 3 );
580	if ( ( $handle = @opendir( $blog_cache_dir ) ) ) {
581	while ( false !== ($file = @readdir($handle))) {
582	if ( preg_match("/^$file_prefix/", $file) )
583	@unlink( $blog_cache_dir . $file );
584	}
585	closedir($handle);
586	}
587	wp_cache_writers_exit();
588	}
589
590	function prune_super_cache( $directory, $force = false, $rename = false ) {
591	global $cache_max_time, $cache_path, $super_cache_enabled, $cache_rebuild_files, $blog_cache_dir;
592
593	if( !is_admin() && $super_cache_enabled == 0 )
594	return false;
595
596	if( !isset( $cache_max_time ) )
597	$cache_max_time = 3600;
598
599	$now = time();
600
601	$protected_directories = array( $cache_path . '.htaccess', $cache_path . $blog_cache_dir . 'meta', $cache_path . 'supercache' );
602
603	$oktodelete = false;
604	if (is_dir($directory)) {
605	if( $dh = @opendir( $directory ) ) {
606	$directory = trailingslashit( $directory );
607	while( ( $entry = @readdir( $dh ) ) !== false ) {
608	if ($entry == '.' \|\| $entry == '..')
609	continue;
610	$entry = $directory . $entry;
611	prune_super_cache( $entry, $force, $rename );
612	// If entry is a directory, AND it's not a protected one, AND we're either forcing the delete, OR the file is out of date,
613	if( is_dir( $entry ) && !in_array( $entry, $protected_directories ) && ( $force \|\| @filemtime( $entry ) + $cache_max_time <= $now ) ) {
614	// if the directory isn't empty can't delete it
615	if( $handle = @opendir( $entry ) ) {
616	$donotdelete = false;
617	while( !$donotdelete && ( $file = @readdir( $handle ) ) !== false ) {
618	if ($file == '.' \|\| $file == '..')
619	continue;
620	$donotdelete = true;
621	}
622	closedir($handle);
623	}
624	if( $donotdelete )
625	continue;
626	if( !$rename ) {
627	@rmdir( $entry );
628	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "gc: deleted $entry", 2 );
629	}
630	}
631	}
632	closedir($dh);
633	}
634	} elseif( is_file($directory) && ($force \|\| @filemtime( $directory ) + $cache_max_time <= $now ) ) {
635	$oktodelete = true;
636	if( in_array( $directory, $protected_directories ) )
637	$oktodelete = false;
638	if( $oktodelete && !$rename ) {
639	@unlink( $directory );
640	} elseif( $oktodelete && $rename ) {
641	wp_cache_rebuild_or_delete( $directory );
642	}
643	}
644	}
645
646	function wp_cache_rebuild_or_delete( $file ) {
647	global $cache_rebuild_files;
648	if( strpos( $file, '?' ) !== false )
649	$file = substr( $file, 0, strpos( $file, '?' ) );
650	if( $cache_rebuild_files && substr( $file, -14 ) != '.needs-rebuild' ) {
651	if( @rename($file, $file . '.needs-rebuild') ) {
652	@touch( $file . '.needs-rebuild' );
653	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "rebuild_or_gc: rename to {$file}.needs-rebuild", 2 );
654	} else {
655	@unlink( $file );
656	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "rebuild_or_gc: deleted $file", 2 );
657	}
658	} else {
659	@unlink( $file );
660	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "rebuild_or_gc: deleted $file", 2 );
661	}
662	}
663
664	function wp_cache_phase2_clean_expired( $file_prefix, $force = false ) {
665	global $cache_path, $cache_max_time, $blog_cache_dir, $wp_cache_preload_on;
666
667	clearstatcache();
668	if( !wp_cache_writers_entry() )
669	return false;
670	$now = time();
671	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Cleaning expired cache files in $blog_cache_dir", 2 );
672	if ( ( $handle = @opendir( $blog_cache_dir ) ) ) {
673	while ( false !== ($file = readdir($handle))) {
674	if ( preg_match("/^$file_prefix/", $file) &&
675	(@filemtime( $blog_cache_dir . $file) + $cache_max_time) <= $now ) {
676	@unlink( $blog_cache_dir . $file );
677	@unlink( $blog_cache_dir . 'meta/' . str_replace( '.html', '.meta', $file ) );
678	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Deleting $blog_cache_dir{$file} (plus meta)", 5 );
679	continue;
680	}
681	if($file != '.' && $file != '..') {
682	if( is_dir( $blog_cache_dir . $file ) == false && (@filemtime($blog_cache_dir . $file) + $cache_max_time) <= $now ) {
683	if( substr( $file, -9 ) != '.htaccess' ) {
684	@unlink($blog_cache_dir . $file);
685	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Deleting $blog_cache_dir{$file}", 5 );
686	}
687	}
688	}
689	}
690	closedir($handle);
691	if ( false == $wp_cache_preload_on \|\| true == $force ) {
692	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Doing GC on supercache dir: {$cache_path}supercache", 2 );
693	prune_super_cache( $cache_path . 'supercache' );
694	}
695	}
696
697	wp_cache_writers_exit();
698	return true;
699	}
700
701	function wp_cache_shutdown_callback() {
702	global $wpsc_settings;
703	global $cache_path, $cache_max_time, $file_expired, $file_prefix, $meta_file, $new_cache, $wp_cache_meta, $known_headers, $blog_id, $wp_cache_gzip_encoding, $gzsize, $cache_filename, $supercacheonly, $blog_cache_dir;
704	global $wp_cache_request_uri, $wp_cache_key, $wp_cache_object_cache, $cache_enabled;
705
706	$wp_cache_meta[ 'uri' ] = $_SERVER["SERVER_NAME"].preg_replace('/[ <>\'\"\r\n\t]/', '', $wp_cache_request_uri); // To avoid XSS attacks
707	$wp_cache_meta[ 'blog_id' ] = $blog_id;
708	$wp_cache_meta[ 'post' ] = wp_cache_post_id();
709	$wp_cache_meta[ 'key' ] = $wp_cache_key;
710	$wp_cache_meta = apply_filters( 'wp_cache_meta', $wp_cache_meta );
711
712	$response = wp_cache_get_response_headers();
713	foreach ($known_headers as $key) {
714	if(isset($response[$key])) {
715	$wp_cache_meta[ 'headers' ][ $key ] = "$key: " . $response[$key];
716	}
717	}
718	if (!isset( $response['Last-Modified'] )) {
719	$value = gmdate('D, d M Y H:i:s') . ' GMT';
720	/* Dont send this the first time */
721	/* @header('Last-Modified: ' . $value); */
722	$wp_cache_meta[ 'headers' ][ 'Last-Modified' ] = "Last-Modified: $value";
723	}
724	if ( !isset( $response[ 'Content-Type' ] ) && !isset( $response[ 'Content-type' ] ) ) {
725	// On some systems, headers set by PHP can't be fetched from
726	// the output buffer. This is a last ditch effort to set the
727	// correct Content-Type header for feeds, if we didn't see
728	// it in the response headers already. -- dougal
729	if (is_feed()) {
730	$type = get_query_var('feed');
731	$type = str_replace('/','',$type);
732	switch ($type) {
733	case 'atom':
734	$value = "application/atom+xml";
735	break;
736	case 'rdf':
737	$value = "application/rdf+xml";
738	break;
739	case 'rss':
740	case 'rss2':
741	default:
742	$value = "application/rss+xml";
743	}
744	} else { // not a feed
745	$value = get_option( 'html_type' );
746	if( $value == '' )
747	$value = 'text/html';
748	}
749	$value .= "; charset=\"" . $wpsc_settings[ 'wp_cache_blog_charset' ] . "\"";
750
751	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Sending 'Content-Type: $value' header.", 2 );
752	@header("Content-Type: $value");
753	$wp_cache_meta[ 'headers' ][ 'Content-Type' ] = "Content-Type: $value";
754	}
755
756	if ( ! $supercacheonly && $new_cache ) {
757	if( !isset( $wp_cache_meta[ 'dynamic' ] ) && $wp_cache_gzip_encoding && !in_array( 'Content-Encoding: ' . $wp_cache_gzip_encoding, $wp_cache_meta[ 'headers' ] ) ) {
758	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Sending gzip headers.", 2 );
759	$wp_cache_meta[ 'headers' ][ 'Content-Encoding' ] = 'Content-Encoding: ' . $wp_cache_gzip_encoding;
760	$wp_cache_meta[ 'headers' ][ 'Vary' ] = 'Vary: Accept-Encoding, Cookie';
761	}
762
763	$serial = serialize($wp_cache_meta);
764	if( wp_cache_writers_entry() ) {
765	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Writing meta file: {$blog_cache_dir}meta/{$meta_file}", 2 );
766	if ( false == $wp_cache_object_cache ) {
767	$tmp_meta_filename = $blog_cache_dir . 'meta/' . uniqid( mt_rand(), true ) . '.tmp';
768	$fr = @fopen( $tmp_meta_filename, 'w');
769	if( !$fr )
770	@mkdir( $blog_cache_dir . 'meta' );
771	$fr = fopen( $tmp_meta_filename, 'w');
772	fputs($fr, $serial);
773	fclose($fr);
774	@chmod( $tmp_meta_filename, 0666 & ~umask());
775	if( !@rename( $tmp_meta_filename, $blog_cache_dir . 'meta/' . $meta_file ) ) {
776	@unlink( $blog_cache_dir . 'meta/' . $meta_file );
777	@rename( $tmp_meta_filename, $blog_cache_dir . 'meta/' . $meta_file );
778	}
779	} elseif ( $cache_enabled ) {
780	$oc_key = get_oc_key() . ".meta";
781	if ( gzip_accepted() )
782	$oc_key .= ".gz";
783	wp_cache_set( $oc_key, $serial, 'supercache', $cache_max_time );
784	}
785	wp_cache_writers_exit();
786	}
787	}
788	global $time_to_gc_cache;
789	if( isset( $time_to_gc_cache ) && $time_to_gc_cache == 1 ) {
790	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Executing wp_cache_gc action.", 3 );
791	do_action( 'wp_cache_gc' );
792	}
793	}
794
795	function wp_cache_no_postid($id) {
796	return wp_cache_post_change(wp_cache_post_id());
797	}
798
799	function wp_cache_get_postid_from_comment( $comment_id, $status = 'NA' ) {
800	global $super_cache_enabled, $wp_cache_request_uri;
801	$comment = get_comment($comment_id, ARRAY_A);
802	if ( $status != 'NA' ) {
803	$comment[ 'old_comment_approved' ] = $comment[ 'comment_approved' ];
804	$comment[ 'comment_approved' ] = $status;
805	}
806
807	if ( ( $status == 'trash' \|\| $status == 'spam' ) && $comment[ 'comment_approved' ] != 1 ) {
808	// don't modify cache if moderated comments are trashed or spammed
809	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Moderated comment deleted or spammed. Don't delete any cache files.", 4 );
810	return wp_cache_post_id();
811	}
812	$postid = $comment['comment_post_ID'];
813	// Do nothing if comment is not moderated
814	// http://ocaoimh.ie/2006/12/05/caching-wordpress-with-wp-cache-in-a-spam-filled-world
815	if ( !preg_match('/wp-admin\//', $wp_cache_request_uri) ) {
816	if ( $comment['comment_approved'] == 'delete' && ( isset( $comment[ 'old_comment_approved' ] ) && $comment[ 'old_comment_approved' ] == 0 ) ) { // do nothing if moderated comments are deleted
817	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Moderated comment deleted. Don't delete any cache files.", 4 );
818	return $postid;
819	} elseif ( $comment['comment_approved'] == 'spam' ) {
820	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Spam comment. Don't delete any cache files.", 4 );
821	return $postid;
822	} elseif( $comment['comment_approved'] == '0' ) {
823	if ( $comment[ 'content_type' ] == '' ) {
824	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Moderated comment. Don't delete supercache file until comment approved.", 4 );
825	$super_cache_enabled = 0; // don't remove the super cache static file until comment is approved
826	} else {
827	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Moderated ping or trackback. Not deleting cache files..", 4 );
828	return $postid;
829	}
830	}
831	}
832	// We must check it up again due to WP bugs calling two different actions
833	// for delete, for example both wp_set_comment_status and delete_comment
834	// are called when deleting a comment
835	if ($postid > 0) {
836	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Post $postid changed. Update cache.", 4 );
837	return wp_cache_post_change( $postid );
838	} elseif ( $_GET[ 'delete_all' ] != 'Empty Trash' && $_GET[ 'delete_all2' ] != 'Empty Spam' ) {
839	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Unknown post changed. Update cache.", 4 );
840	return wp_cache_post_change( wp_cache_post_id() );
841	}
842	}
843
844	/* Clear out the cache directory. */
845	function wp_cache_clear_cache() {
846	global $cache_path, $wp_cache_object_cache;
847	if ( $wp_cache_object_cache ) {
848	reset_oc_version();
849	} else {
850	prune_super_cache( $cache_path . 'supercache/', true );
851	prune_super_cache( $cache_path, true );
852	}
853	}
854
855	function wp_cache_post_edit($post_id) {
856	global $wp_cache_clear_on_post_edit, $cache_path, $blog_cache_dir;
857	if( $wp_cache_clear_on_post_edit ) {
858	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Clearing cache $blog_cache_dir and {$cache_path}supercache/ on post edit per config.", 2 );
859	if ( $wp_cache_object_cache ) {
860	reset_oc_version();
861	} else {
862	prune_super_cache( $blog_cache_dir, true );
863	prune_super_cache( $cache_path . 'supercache/', true );
864	}
865	} else {
866	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Clearing cache for post $post_id on post edit.", 2 );
867	wp_cache_post_change( $post_id );
868	}
869	}
870
871	function wp_cache_post_id_gc( $siteurl, $post_id, $all = 'all' ) {
872	global $cache_path, $wp_cache_object_cache;
873
874	if ( $wp_cache_object_cache )
875	reset_oc_version();
876
877	$post_id = intval( $post_id );
878	if( $post_id == 0 )
879	return;
880
881	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "wp_cache_post_id_gc post_id: $post_id " . post_permalink( $post_id ) . " clearing cache in $dir{$permalink}.", 4 );
882	$permalink = trailingslashit( str_replace( get_option( 'home' ), '', post_permalink( $post_id ) ) );
883	$dir = $cache_path . 'supercache/' . $siteurl;
884	if ( $all == 'all' ) {
885	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "wp_cache_post_id_gc clearing cache in $dir{$permalink}.", 4 );
886	prune_super_cache( $dir . $permalink, true, true );
887	do_action( 'gc_cache', 'prune', $permalink );
888	@rmdir( $dir . $permalink );
889	} else {
890	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "wp_cache_post_id_gc clearing cached index.html(.gz) in $dir{$permalink}.", 4 );
891	prune_super_cache( $dir . $permalink . 'index.html', true, true );
892	prune_super_cache( $dir . $permalink . 'index.html.gz', true, true );
893	do_action( 'gc_cache', 'prune', $permalink );
894	}
895	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "wp_cache_post_id_gc clearing cache in {$dir}page/.", 4 );
896	prune_super_cache( $dir . 'page/', true );
897	do_action( 'gc_cache', 'prune', '/page/' );
898	}
899
900	function wp_cache_post_change( $post_id ) {
901	global $file_prefix, $cache_path, $blog_id, $super_cache_enabled, $blog_cache_dir, $blogcacheid, $wp_cache_refresh_single_only;
902	static $last_processed = -1;
903
904	if ($post_id == $last_processed) return $post_id;
905	$last_processed = $post_id;
906	$post = get_post( $post_id );
907	if( $post->post_status == 'draft' ) {
908	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "wp_cache_post_change: draft post, not deleting any cache files.", 4 );
909	return $post_id;
910	}
911
912	if( !wp_cache_writers_entry() )
913	return $post_id;
914
915	if ( isset( $wp_cache_refresh_single_only ) && $wp_cache_refresh_single_only && strpos( $_SERVER[ 'REQUEST_URI' ], 'wp-comments-post.php' ) ) {
916	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "wp_cache_post_change: comment detected. only deleting post page.", 4 );
917	$all = false;
918	} else {
919	$all = true;
920	}
921
922	if ( $wp_cache_object_cache )
923	reset_oc_version();
924
925	$permalink = trailingslashit( str_replace( get_option( 'siteurl' ), '', post_permalink( $post_id ) ) );
926	if( $super_cache_enabled ) {
927	$siteurl = trailingslashit( strtolower( preg_replace( '/:.*$/', '', str_replace( 'http://', '', get_option( 'home' ) ) ) ) );
928	// make sure the front page has a rebuild file
929	if ( $all == true ) {
930	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Post change: deleting cache files in " . $cache_path . 'supercache/' . $siteurl, 4 );
931	prune_super_cache( $cache_path . 'supercache/' . $siteurl . 'index.html', true, true );
932	prune_super_cache( $cache_path . 'supercache/' . $siteurl . 'index.html.gz', true, true );
933	do_action( 'gc_cache', 'prune', 'homepage' );
934	}
935	wp_cache_post_id_gc( $siteurl, $post_id );
936	if( $all == true && get_option( 'show_on_front' ) == 'page' ) {
937	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Post change: deleting page_on_front and_page_for_posts pages.", 4 );
938	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Post change: page_on_front " . get_option( 'page_on_front' ), 4 );
939	wp_cache_post_id_gc( $siteurl, get_option( 'page_on_front' ), 'single' );
940	$permalink = trailingslashit( str_replace( get_option( 'home' ), '', post_permalink( get_option( 'page_for_posts' ) ) ) );
941	prune_super_cache( $cache_path . 'supercache/' . $siteurl . $permalink . 'index.html', true, true );
942	prune_super_cache( $cache_path . 'supercache/' . $siteurl . $permalink . 'index.html.gz', true, true );
943	do_action( 'gc_cache', 'prune', $permalink );
944	}
945	}
946
947	$matches = array();
948	if ( ($handle = @opendir( $blog_cache_dir . 'meta/' )) ) {
949	while ( false !== ($file = readdir($handle))) {
950	if ( preg_match("/^({$file_prefix}{$blogcacheid}.*)\.meta/", $file, $matches) ) {
951	$meta_pathname = $blog_cache_dir . 'meta/' . $file;
952	$content_pathname = $blog_cache_dir . $matches[1] . ".html";
953	$meta = unserialize(@file_get_contents($meta_pathname));
954	if( false == is_array( $meta ) ) {
955	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Post change cleaning up stray file: $content_pathname", 4 );
956	@unlink($meta_pathname);
957	@unlink($content_pathname);
958	continue;
959	}
960	if ($post_id > 0 && $meta) {
961	if ( $meta[ 'blog_id' ] == $blog_id && ( ( $all == true && !$meta[ 'post' ] ) \|\| $meta[ 'post' ] == $post_id) ) {
962	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Post change: deleting post cache files for {$meta[ 'uri' ]}: $content_pathname", 4 );
963	@unlink($meta_pathname);
964	@unlink($content_pathname);
965	if ( $super_cache_enabled == true ) {
966	@wp_cache_rebuild_or_delete($cache_path . 'supercache/' . trailingslashit( $meta[ 'uri' ] ) . 'index.html');
967	@wp_cache_rebuild_or_delete($cache_path . 'supercache/' . trailingslashit( $meta[ 'uri' ] ) . 'index.html.gz');
968	do_action( 'gc_cache', 'rebuild', trailingslashit( $meta[ 'uri' ] ) );
969	}
970	}
971	} elseif ($meta[ 'blog_id' ] == $blog_id) {
972	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Post change: deleting cache files for {$meta[ 'uri' ]}: $content_pathname", 4 );
973	@unlink($meta_pathname);
974	@unlink($content_pathname);
975	if ( $super_cache_enabled == true ) {
976	@wp_cache_rebuild_or_delete($cache_path . 'supercache/' . trailingslashit( $meta[ 'uri' ] ) . 'index.html');
977	@wp_cache_rebuild_or_delete($cache_path . 'supercache/' . trailingslashit( $meta[ 'uri' ] ) . 'index.html.gz');
978	do_action( 'gc_cache', 'rebuild', trailingslashit( $meta[ 'uri' ] ) );
979	}
980	}
981
982	}
983	}
984	closedir($handle);
985	}
986	wp_cache_writers_exit();
987	return $post_id;
988	}
989
990	function wp_cache_microtime_diff($a, $b) {
991	list($a_dec, $a_sec) = explode(' ', $a);
992	list($b_dec, $b_sec) = explode(' ', $b);
993	return $b_sec - $a_sec + $b_dec - $a_dec;
994	}
995
996	function wp_cache_post_id() {
997	global $posts, $comment_post_ID, $post_ID;
998	// We try hard all options. More frequent first.
999	if ($post_ID > 0 ) return $post_ID;
1000	if ($comment_post_ID > 0 ) return $comment_post_ID;
1001	if (is_single() \|\| is_page()) return $posts[0]->ID;
1002	if (isset( $_GET[ 'p' ] ) && $_GET['p'] > 0) return $_GET['p'];
1003	if (isset( $_POST[ 'p' ] ) && $_POST['p'] > 0) return $_POST['p'];
1004	return 0;
1005	}
1006
1007	function wp_cache_gc_cron() {
1008	global $file_prefix, $cache_max_time;
1009
1010	if ( $cache_max_time == 0 )
1011	return false;
1012
1013	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Cache garbage collection.', 5 );
1014
1015	if( !isset( $cache_max_time ) )
1016	$cache_max_time = 600;
1017
1018	$start = time();
1019	if( !wp_cache_phase2_clean_expired($file_prefix ) ) {
1020	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Cache Expiry cron job failed. Probably mutex locked.', 1 );
1021	update_option( 'wpsupercache_gc_time', time() - ( $cache_max_time - 10 ) ); // if GC failed then run it again in one minute
1022	}
1023	if( time() - $start > 30 )
1024	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Cache Expiry cron job took more than 30 seconds to execute.\nYou should reduce the Expiry Time in the WP Super Cache admin page\nas you probably have more cache files than your server can handle efficiently.", 1 );
1025	}
1026
1027	?>
1028