wp-cache-phase2.php — WP Super Cache 0.9.9.7

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

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wp-cache-phase2.php

1041 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, $wp_cache_gmt_offset, $wp_cache_blog_charset;
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	$wp_cache_gmt_offset = get_option( 'gmt_offset' ); // caching for later use when wpdb is gone. http://wordpress.org/support/topic/224349
15	$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 $mutex, $wp_cache_mutex_disabled, $use_flock, $blog_cache_dir, $mutex_filename, $sem_id;
185
186	if( isset( $wp_cache_mutex_disabled) && $wp_cache_mutex_disabled )
187	return true;
188
189	if( !is_bool( $use_flock ) ) {
190	if(function_exists('sem_get'))
191	$use_flock = false;
192	else
193	$use_flock = true;
194	}
195
196	$mutex = false;
197	if ($use_flock ) {
198	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Created mutex lock on filename: {$blog_cache_dir}{$mutex_filename}", 5 );
199	$mutex = @fopen( $blog_cache_dir . $mutex_filename, 'w' );
200	} else {
201	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Created mutex lock on semaphore: {$sem_id}", 5 );
202	$mutex = @sem_get( $sem_id, 1, 0644 \| IPC_CREAT, 1 );
203	}
204	}
205
206	function wp_cache_writers_entry() {
207	global $mutex, $wp_cache_mutex_disabled, $use_flock;
208
209	if( isset( $wp_cache_mutex_disabled ) && $wp_cache_mutex_disabled )
210	return true;
211
212	if( !$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 ( $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 $mutex, $wp_cache_mutex_disabled, $use_flock;
230
231	if( isset( $wp_cache_mutex_disabled ) && $wp_cache_mutex_disabled )
232	return true;
233
234	if( !$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 ( $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	$buffer = apply_filters( 'wp_cache_ob_callback_filter', $buffer );
251	if( defined( 'DONOTCACHEPAGE' ) ) {
252	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'DONOTCACHEPAGE defined. Caching disabled.', 2 );
253	return $buffer;
254	}
255
256	if ( isset( $wp_cache_pages[ 'single' ] ) && $wp_cache_pages[ 'single' ] == 1 && is_single() ) {
257	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching single post.', 2 );
258	return $buffer;
259	} elseif ( isset( $wp_cache_pages[ 'pages' ] ) && $wp_cache_pages[ 'pages' ] == 1 && is_page() ) {
260	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching single page.', 2 );
261	return $buffer;
262	} elseif ( isset( $wp_cache_pages[ 'archives' ] ) && $wp_cache_pages[ 'archives' ] == 1 && is_archive() ) {
263	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching archive page.', 2 );
264	return $buffer;
265	} elseif ( isset( $wp_cache_pages[ 'tag' ] ) && $wp_cache_pages[ 'tag' ] == 1 && is_tag() ) {
266	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching tag page.', 2 );
267	return $buffer;
268	} elseif ( isset( $wp_cache_pages[ 'category' ] ) && $wp_cache_pages[ 'category' ] == 1 && is_category() ) {
269	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching category page.', 2 );
270	return $buffer;
271	} elseif ( isset( $wp_cache_pages[ 'frontpage' ] ) && $wp_cache_pages[ 'frontpage' ] == 1 && is_front_page() ) {
272	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching front page.', 2 );
273	return $buffer;
274	} elseif ( isset( $wp_cache_pages[ 'home' ] ) && $wp_cache_pages[ 'home' ] == 1 && is_home() ) {
275	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching home page.', 2 );
276	return $buffer;
277	} elseif ( isset( $wp_cache_pages[ 'search' ] ) && $wp_cache_pages[ 'search' ] == 1 && is_search() ) {
278	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching search page.', 2 );
279	return $buffer;
280	} elseif ( isset( $wp_cache_pages[ 'feed' ] ) && $wp_cache_pages[ 'feed' ] == 1 && is_feed() ) {
281	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching feed.', 2 );
282	return $buffer;
283	}
284
285	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Output buffer callback', 4 );
286
287	$buffer = &wp_cache_get_ob( $buffer );
288	wp_cache_shutdown_callback();
289	return $buffer;
290	}
291
292	function wp_cache_append_tag( &$buffer ) {
293	global $wp_cache_gmt_offset;
294	global $cache_enabled, $super_cache_enabled;
295	$timestamp = gmdate('Y-m-d H:i:s', (time() + ( $wp_cache_gmt_offset * 3600)));
296	if ( $cache_enabled \|\| $super_cache_enabled ) {
297	$buffer .= "<!-- Cached page generated by WP-Super-Cache on $timestamp -->\n";
298	} else {
299	$buffer .= "<!-- Live page served on $timestamp -->\n";
300	}
301	}
302
303	function wp_cache_get_ob(&$buffer) {
304	global $wpsc_settings;
305	global $cache_enabled, $cache_path, $cache_filename, $meta_file, $wp_start_time, $supercachedir;
306	global $new_cache, $wp_cache_meta, $file_expired, $blog_id, $cache_compression;
307	global $wp_cache_gzip_encoding, $super_cache_enabled, $cached_direct_pages;
308	global $wp_cache_404, $gzsize, $supercacheonly;
309	global $blog_cache_dir, $wp_cache_request_uri, $wp_supercache_cache_list;
310	global $wp_cache_not_logged_in, $wp_cache_object_cache, $cache_max_time;
311
312	$new_cache = true;
313	$wp_cache_meta = '';
314
315	/* Mode paranoic, check for closing tags
316	* we avoid caching incomplete files */
317	if ( $buffer == '' ) {
318	$new_cache = false;
319	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) {
320	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 );
321	$buffer .= "\n<!-- Page not cached by WP Super Cache. Blank Page. Check output buffer usage by plugins. -->\n";
322	}
323	}
324
325	if ( $wp_cache_404 && false == apply_filters( 'wpsupercache_404', false ) ) {
326	$new_cache = false;
327	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) {
328	wp_cache_debug( "404 file not found not cached", 2 );
329	$buffer .= "\n<!-- Page not cached by WP Super Cache. 404. -->\n";
330	}
331	}
332
333	if (!preg_match('/(<\/html>\|<\/rss>\|<\/feed>\|<\/urlset)/i',$buffer) ) {
334	$new_cache = false;
335	if( false === strpos( $_SERVER[ 'REQUEST_URI' ], 'robots.txt' ) ) {
336	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) {
337	wp_cache_debug( "No closing html tag. Not caching.", 2 );
338	$buffer .= "\n<!-- Page not cached by WP Super Cache. No closing HTML tag. Check your theme. -->\n";
339	}
340	} else {
341	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "robots.txt detected. Not caching.", 2 );
342	}
343	}
344
345	if( !$new_cache )
346	return $buffer;
347
348	$duration = wp_cache_microtime_diff($wp_start_time, microtime());
349	$duration = sprintf("%0.3f", $duration);
350	$buffer .= "\n<!-- Dynamic page generated in $duration seconds. -->\n";
351
352	if( !wp_cache_writers_entry() ) {
353	$buffer .= "\n<!-- Page not cached by WP Super Cache. Could not get mutex lock. -->\n";
354	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Could not get mutex lock. Not caching.", 1 );
355	return $buffer;
356	}
357
358	$home_url = parse_url( trailingslashit( get_bloginfo( 'url' ) ) );
359
360	$dir = get_current_url_supercache_dir();
361	$supercachedir = $cache_path . 'supercache/' . preg_replace('/:.*$/', '', $home_url[ 'host' ]);
362	if( !empty( $_GET ) \|\| is_feed() \|\| ( $super_cache_enabled == true && is_dir( substr( $supercachedir, 0, -1 ) . '.disabled' ) ) ) {
363	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 );
364	$super_cache_enabled = false;
365	}
366
367	$tmp_wpcache_filename = $cache_path . uniqid( mt_rand(), true ) . '.tmp';
368
369	$supercacheonly = false;
370	if( $super_cache_enabled ) {
371	if ( wp_cache_get_cookies_values() == '' ) {
372	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Anonymous user detected. Only creating Supercache file.", 3 );
373	$supercacheonly = true;
374	}
375	}
376
377	if ( $wp_cache_not_logged_in && wp_cache_get_cookies_values() != '' ) {
378	$super_cache_enabled = false;
379	$cache_enabled = false;
380	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Not caching for known user.', 5 );
381	}
382
383	if ( $wp_cache_object_cache ) { // half on mode when using the object cache
384	if ( wp_cache_get_cookies_values() != '' ) {
385	$cache_enabled = false;
386	}
387	$super_cache_enabled = false;
388	$supercacheonly = false;
389	wp_cache_init(); // PHP5 destroys objects during shutdown
390	}
391
392	$fr = $fr2 = $gz = false;
393	if ( $cache_enabled ) {
394	// Open wp-cache cache file
395	if ( !$supercacheonly && ( !@file_exists( $blog_cache_dir . $cache_filename ) \|\| ( @file_exists( $blog_cache_dir . $cache_filename ) && ( time() - @filemtime( $blog_cache_dir . $cache_filename ) ) > 5 ) ) ) {
396	if ( false == $wp_cache_object_cache ) {
397	$fr = @fopen($tmp_wpcache_filename, 'w');
398	if (!$fr) {
399	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 );
400	$buffer .= "<!-- File not cached! Super Cache Couldn't write to: " . str_replace( ABSPATH, '', $cache_path ) . $cache_filename . " -->\n";
401	wp_cache_writers_exit();
402	return $buffer;
403	}
404	}
405	} else {
406	$user_info = wp_cache_get_cookies_values();
407	$do_cache = apply_filters( 'do_createsupercache', $user_info );
408	if ( $super_cache_enabled && ( $user_info == '' \|\| $do_cache === true ) ) {
409
410	if( @is_dir( $dir ) == false )
411	@wp_mkdir_p( $dir );
412
413	$cache_fname = "{$dir}index.html";
414	$tmp_cache_filename = $dir . uniqid( mt_rand(), true ) . '.tmp';
415	if ( !@file_exists( $cache_fname ) \|\| ( @file_exists( $cache_fname ) && ( time() - @filemtime( $cache_fname ) ) > 5 ) ) {
416	$fr2 = @fopen( $tmp_cache_filename, 'w' );
417	if (!$fr2) {
418	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 );
419	$buffer .= "<!-- File not cached! Super Cache Couldn't write to: " . str_replace( ABSPATH, '', $tmp_cache_filename ) . " -->\n";
420	@fclose( $fr );
421	@unlink( $tmp_wpcache_filename );
422	wp_cache_writers_exit();
423	return $buffer;
424	} elseif ( $cache_compression ) {
425	$gz = @fopen( $tmp_cache_filename . ".gz", 'w');
426	if (!$gz) {
427	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 );
428	$buffer .= "<!-- File not cached! Super Cache Couldn't write to: " . str_replace( ABSPATH, '', $tmp_cache_filename ) . ".gz -->\n";
429	@fclose( $fr );
430	@unlink( $tmp_wpcache_filename );
431	@fclose( $fr2 );
432	@unlink( $tmp_cache_filename );
433	wp_cache_writers_exit();
434	return $buffer;
435	}
436	}
437	}
438	}
439	}
440	}
441
442	$added_cache = 0;
443	$oc_key = get_oc_key();
444	if ( preg_match( '/<!--mclude\|<!--mfunc\|<!--dynamic-cached-content-->/', $buffer ) ) { //Dynamic content
445	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Dynamic content found in buffer.", 4 );
446	$store = preg_replace('\|<!--mclude (.?)-->(.?)<!--/mclude-->\|is',
447	"<!--mclude-->\n<?php include_once('" . ABSPATH . "$1'); ?>\n<!--/mclude-->", $buffer);
448	$store = preg_replace('\|<!--mfunc (.?)-->(.?)<!--/mfunc-->\|is',
449	"<!--mfunc-->\n<?php $1 ;?>\n<!--/mfunc-->", $store);
450	$store = preg_replace('\|<!--dynamic-cached-content-->(.?)<!--(.?)--><!--/dynamic-cached-content-->\|is',
451	"<!--dynamic-cached-content-->\n<?php$2?>\n<!--/dynamic-cached-content-->", $store);
452	$wp_cache_meta[ 'dynamic' ] = true;
453	/* Clean function calls in tag */
454	$buffer = preg_replace('\|<!--mclude (.*?)-->\|is', '<!--mclude-->', $buffer);
455	$buffer = preg_replace('\|<!--mfunc (.*?)-->\|is', '<!--mfunc-->', $buffer);
456	$buffer = preg_replace('\|<!--dynamic-cached-content-->(.?)<!--(.?)--><!--/dynamic-cached-content-->\|is',
457	"<!--dynamic-cached-content-->$1<!--/dynamic-cached-content-->", $buffer);
458	$store = apply_filters( 'wpsupercache_buffer', $store );
459	// Append WP Super Cache or Live page comment tag
460	wp_cache_append_tag($buffer);
461	wp_cache_append_tag($store);
462	global $wp_super_cache_late_init;
463	if ( false == isset( $wp_super_cache_late_init ) \|\| ( isset( $wp_super_cache_late_init ) && $wp_super_cache_late_init == 0 ) )
464	$buffer .= '<!-- Super Cache dynamic page detected but $wp_super_cache_late_init not set. See the readme.txt for further details. -->';
465
466	if ( false == $wp_cache_object_cache ) {
467	if( $fr )
468	fputs($fr, $store);
469	} else {
470	wp_cache_set( $oc_key, $store, 'supercache', $cache_max_time );
471	}
472	} else {
473	$buffer = apply_filters( 'wpsupercache_buffer', $buffer );
474	// Append WP Super Cache or Live page comment tag
475	wp_cache_append_tag($buffer);
476	if( $gz \|\| $wp_cache_gzip_encoding ) {
477	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Gzipping buffer.", 5 );
478	$gzdata = gzencode( $buffer . "<!-- Compression = gzip -->", 6, FORCE_GZIP );
479	$gzsize = strlen($gzdata);
480	}
481	if ($wp_cache_gzip_encoding) {
482	$wp_cache_meta[ 'headers' ][ 'Content-Encoding' ] = 'Content-Encoding: ' . $wp_cache_gzip_encoding;
483	$wp_cache_meta[ 'headers' ][ 'Vary' ] = 'Vary: Accept-Encoding, Cookie';
484	// Return uncompressed data & store compressed for later use
485	if ( false == $wp_cache_object_cache ) {
486	if( $fr ) {
487	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Writing gzipped buffer to wp-cache cache file.", 5 );
488	fputs($fr, $gzdata);
489	}
490	} elseif ( $cache_enabled ) {
491	wp_cache_set( $oc_key . ".gz", $gzdata, 'supercache', $cache_max_time );
492	$added_cache = 1;
493	}
494	} else { // no compression
495	$wp_cache_meta[ 'headers' ][ 'Vary' ] = 'Vary: Cookie';
496	if ( false == $wp_cache_object_cache ) {
497	if( $fr ) {
498	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Writing non-gzipped buffer to wp-cache cache file.", 5 );
499	fputs($fr, $buffer);
500	}
501	} elseif ( $cache_enabled ) {
502	wp_cache_set( $oc_key, $buffer, 'supercache', $cache_max_time );
503	$added_cache = 1;
504	}
505	}
506	if ( false == $wp_cache_object_cache ) {
507	if( $fr2 ) {
508	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Writing non-gzipped buffer to supercache file.", 5 );
509	fputs($fr2, $buffer . '<!-- super cache -->' );
510	}
511	if( $gz ) {
512	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Writing gzipped buffer to supercache file.", 5 );
513	fwrite($gz, $gzdata );
514	}
515	}
516	}
517	$new_cache = true;
518	if ( false == $wp_cache_object_cache ) {
519	if( $fr ) {
520	$supercacheonly = false;
521	fclose($fr);
522	if ( filesize( $tmp_wpcache_filename ) == 0 ) {
523	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 );
524	@unlink( $tmp_wpcache_filename );
525	} else {
526	if ( !rename( $tmp_wpcache_filename, $blog_cache_dir . $cache_filename ) ) {
527	unlink( $blog_cache_dir . $cache_filename );
528	rename( $tmp_wpcache_filename, $blog_cache_dir . $cache_filename );
529	}
530	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 );
531	$added_cache = 1;
532	}
533	}
534	if( $fr2 ) {
535	fclose($fr2);
536	if ( $cache_fname == $supercachedir . $home_url[ 'path' ] . 'index.html' && !( is_front_page() \|\| is_home() ) ) {
537	wp_cache_writers_exit();
538	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Warning! Not writing another page to front page cache.", 1 );
539	return $buffer;
540	} elseif ( filesize( $tmp_cache_filename ) == 0 ) {
541	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 );
542	@unlink( $tmp_cache_filename );
543	} else {
544	if ( !@rename( $tmp_cache_filename, $cache_fname ) ) {
545	@unlink( $cache_fname );
546	@rename( $tmp_cache_filename, $cache_fname );
547	}
548	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Renamed temp supercache file to $cache_fname", 5 );
549	$added_cache = 1;
550	}
551	}
552	if( $gz ) {
553	fclose($gz);
554	if ( filesize( $tmp_cache_filename . '.gz' ) == 0 ) {
555	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 );
556	@unlink( $tmp_cache_filename . '.gz' );
557	} else {
558	if ( !@rename( $tmp_cache_filename . '.gz', $cache_fname . '.gz' ) ) {
559	@unlink( $cache_fname . '.gz' );
560	@rename( $tmp_cache_filename . '.gz', $cache_fname . '.gz' );
561	}
562	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 );
563	$added_cache = 1;
564	}
565	}
566	}
567	if ( $added_cache && isset( $wp_supercache_cache_list ) && $wp_supercache_cache_list ) {
568	update_option( 'wpsupercache_count', ( get_option( 'wpsupercache_count' ) + 1 ) );
569	$last_urls = (array)get_option( 'supercache_last_cached' );
570	if ( count( $last_urls ) >= 10 )
571	$last_urls = array_slice( $last_urls, 1, 9 );
572	$last_urls[] = array( 'url' => $_SERVER[ 'REQUEST_URI' ], 'date' => date( 'Y-m-d H:i:s' ) );
573	update_option( 'supercache_last_cached', $last_urls );
574	}
575	wp_cache_writers_exit();
576	if ( !headers_sent() && $wp_cache_gzip_encoding && $gzdata) {
577	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Writing gzip content headers. Sending buffer to browser", 5 );
578	header( 'Content-Encoding: ' . $wp_cache_gzip_encoding );
579	header( 'Vary: Accept-Encoding, Cookie' );
580	header( 'Content-Length: ' . $gzsize );
581	return $gzdata;
582	} else {
583	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Sending buffer to browser", 5 );
584	return $buffer;
585	}
586	}
587
588	function wp_cache_phase2_clean_cache($file_prefix) {
589	global $cache_path, $blog_cache_dir;
590
591	if( !wp_cache_writers_entry() )
592	return false;
593	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Cleaning cache in $blog_cache_dir", 3 );
594	if ( ( $handle = @opendir( $blog_cache_dir ) ) ) {
595	while ( false !== ($file = @readdir($handle))) {
596	if ( preg_match("/^$file_prefix/", $file) )
597	@unlink( $blog_cache_dir . $file );
598	}
599	closedir($handle);
600	}
601	wp_cache_writers_exit();
602	}
603
604	function prune_super_cache( $directory, $force = false, $rename = false ) {
605	global $cache_max_time, $cache_path, $super_cache_enabled, $cache_rebuild_files, $blog_cache_dir;
606
607	if( !is_admin() && $super_cache_enabled == 0 )
608	return false;
609
610	if( !isset( $cache_max_time ) )
611	$cache_max_time = 3600;
612
613	$now = time();
614
615	$protected_directories = array( $cache_path . '.htaccess', $cache_path . $blog_cache_dir . 'meta', $cache_path . 'supercache' );
616
617	$oktodelete = false;
618	if (is_dir($directory)) {
619	if( $dh = @opendir( $directory ) ) {
620	$directory = trailingslashit( $directory );
621	while( ( $entry = @readdir( $dh ) ) !== false ) {
622	if ($entry == '.' \|\| $entry == '..')
623	continue;
624	$entry = $directory . $entry;
625	prune_super_cache( $entry, $force, $rename );
626	// 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,
627	if( is_dir( $entry ) && !in_array( $entry, $protected_directories ) && ( $force \|\| @filemtime( $entry ) + $cache_max_time <= $now ) ) {
628	// if the directory isn't empty can't delete it
629	if( $handle = @opendir( $entry ) ) {
630	$donotdelete = false;
631	while( !$donotdelete && ( $file = @readdir( $handle ) ) !== false ) {
632	if ($file == '.' \|\| $file == '..')
633	continue;
634	$donotdelete = true;
635	}
636	closedir($handle);
637	}
638	if( $donotdelete )
639	continue;
640	if( !$rename ) {
641	@rmdir( $entry );
642	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "gc: deleted $entry", 2 );
643	}
644	}
645	}
646	closedir($dh);
647	}
648	} elseif( is_file($directory) && ($force \|\| @filemtime( $directory ) + $cache_max_time <= $now ) ) {
649	$oktodelete = true;
650	if( in_array( $directory, $protected_directories ) )
651	$oktodelete = false;
652	if( $oktodelete && !$rename ) {
653	@unlink( $directory );
654	} elseif( $oktodelete && $rename ) {
655	wp_cache_rebuild_or_delete( $directory );
656	}
657	}
658	}
659
660	function wp_cache_rebuild_or_delete( $file ) {
661	global $cache_rebuild_files;
662	if( strpos( $file, '?' ) !== false )
663	$file = substr( $file, 0, strpos( $file, '?' ) );
664	if( $cache_rebuild_files && substr( $file, -14 ) != '.needs-rebuild' ) {
665	if( @rename($file, $file . '.needs-rebuild') ) {
666	@touch( $file . '.needs-rebuild' );
667	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "rebuild_or_gc: rename to {$file}.needs-rebuild", 2 );
668	} else {
669	@unlink( $file );
670	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "rebuild_or_gc: deleted $file", 2 );
671	}
672	} else {
673	@unlink( $file );
674	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "rebuild_or_gc: deleted $file", 2 );
675	}
676	}
677
678	function wp_cache_phase2_clean_expired( $file_prefix, $force = false ) {
679	global $cache_path, $cache_max_time, $blog_cache_dir, $wp_cache_preload_on;
680
681	clearstatcache();
682	if( !wp_cache_writers_entry() )
683	return false;
684	$now = time();
685	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Cleaning expired cache files in $blog_cache_dir", 2 );
686	if ( ( $handle = @opendir( $blog_cache_dir ) ) ) {
687	while ( false !== ($file = readdir($handle))) {
688	if ( preg_match("/^$file_prefix/", $file) &&
689	(@filemtime( $blog_cache_dir . $file) + $cache_max_time) <= $now ) {
690	@unlink( $blog_cache_dir . $file );
691	@unlink( $blog_cache_dir . 'meta/' . str_replace( '.html', '.meta', $file ) );
692	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Deleting $blog_cache_dir{$file} (plus meta)", 5 );
693	continue;
694	}
695	if($file != '.' && $file != '..') {
696	if( is_dir( $blog_cache_dir . $file ) == false && (@filemtime($blog_cache_dir . $file) + $cache_max_time) <= $now ) {
697	if( substr( $file, -9 ) != '.htaccess' ) {
698	@unlink($blog_cache_dir . $file);
699	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Deleting $blog_cache_dir{$file}", 5 );
700	}
701	}
702	}
703	}
704	closedir($handle);
705	if ( false == $wp_cache_preload_on \|\| true == $force ) {
706	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Doing GC on supercache dir: {$cache_path}supercache", 2 );
707	prune_super_cache( $cache_path . 'supercache' );
708	}
709	}
710
711	wp_cache_writers_exit();
712	return true;
713	}
714
715	function wp_cache_shutdown_callback() {
716	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;
717	global $wp_cache_request_uri, $wp_cache_key, $wp_cache_object_cache, $cache_enabled, $wp_cache_blog_charset;
718
719	$wp_cache_meta[ 'uri' ] = $_SERVER["SERVER_NAME"].preg_replace('/[ <>\'\"\r\n\t]/', '', $wp_cache_request_uri); // To avoid XSS attacks
720	$wp_cache_meta[ 'blog_id' ] = $blog_id;
721	$wp_cache_meta[ 'post' ] = wp_cache_post_id();
722	$wp_cache_meta[ 'key' ] = $wp_cache_key;
723	$wp_cache_meta = apply_filters( 'wp_cache_meta', $wp_cache_meta );
724
725	$response = wp_cache_get_response_headers();
726	foreach ($known_headers as $key) {
727	if(isset($response[$key])) {
728	$wp_cache_meta[ 'headers' ][ $key ] = "$key: " . $response[$key];
729	}
730	}
731	if (!isset( $response['Last-Modified'] )) {
732	$value = gmdate('D, d M Y H:i:s') . ' GMT';
733	/* Dont send this the first time */
734	/* @header('Last-Modified: ' . $value); */
735	$wp_cache_meta[ 'headers' ][ 'Last-Modified' ] = "Last-Modified: $value";
736	}
737	if ( !isset( $response[ 'Content-Type' ] ) && !isset( $response[ 'Content-type' ] ) ) {
738	// On some systems, headers set by PHP can't be fetched from
739	// the output buffer. This is a last ditch effort to set the
740	// correct Content-Type header for feeds, if we didn't see
741	// it in the response headers already. -- dougal
742	if (is_feed()) {
743	$type = get_query_var('feed');
744	$type = str_replace('/','',$type);
745	switch ($type) {
746	case 'atom':
747	$value = "application/atom+xml";
748	break;
749	case 'rdf':
750	$value = "application/rdf+xml";
751	break;
752	case 'rss':
753	case 'rss2':
754	default:
755	$value = "application/rss+xml";
756	}
757	} else { // not a feed
758	$value = get_option( 'html_type' );
759	if( $value == '' )
760	$value = 'text/html';
761	}
762	$value .= "; charset=\"" . $wp_cache_blog_charset . "\"";
763
764	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Sending 'Content-Type: $value' header.", 2 );
765	@header("Content-Type: $value");
766	$wp_cache_meta[ 'headers' ][ 'Content-Type' ] = "Content-Type: $value";
767	}
768
769	if ( ! $supercacheonly && $new_cache ) {
770	if( !isset( $wp_cache_meta[ 'dynamic' ] ) && $wp_cache_gzip_encoding && !in_array( 'Content-Encoding: ' . $wp_cache_gzip_encoding, $wp_cache_meta[ 'headers' ] ) ) {
771	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Sending gzip headers.", 2 );
772	$wp_cache_meta[ 'headers' ][ 'Content-Encoding' ] = 'Content-Encoding: ' . $wp_cache_gzip_encoding;
773	$wp_cache_meta[ 'headers' ][ 'Vary' ] = 'Vary: Accept-Encoding, Cookie';
774	}
775
776	$serial = serialize($wp_cache_meta);
777	if( wp_cache_writers_entry() ) {
778	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 );
779	if ( false == $wp_cache_object_cache ) {
780	$tmp_meta_filename = $blog_cache_dir . 'meta/' . uniqid( mt_rand(), true ) . '.tmp';
781	$fr = @fopen( $tmp_meta_filename, 'w');
782	if( !$fr )
783	@mkdir( $blog_cache_dir . 'meta' );
784	$fr = fopen( $tmp_meta_filename, 'w');
785	fputs($fr, $serial);
786	fclose($fr);
787	@chmod( $tmp_meta_filename, 0666 & ~umask());
788	if( !@rename( $tmp_meta_filename, $blog_cache_dir . 'meta/' . $meta_file ) ) {
789	@unlink( $blog_cache_dir . 'meta/' . $meta_file );
790	@rename( $tmp_meta_filename, $blog_cache_dir . 'meta/' . $meta_file );
791	}
792	} elseif ( $cache_enabled ) {
793	$oc_key = get_oc_key() . ".meta";
794	if ( gzip_accepted() )
795	$oc_key .= ".gz";
796	wp_cache_set( $oc_key, $serial, 'supercache', $cache_max_time );
797	}
798	wp_cache_writers_exit();
799	}
800	}
801	global $time_to_gc_cache;
802	if( isset( $time_to_gc_cache ) && $time_to_gc_cache == 1 ) {
803	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Executing wp_cache_gc action.", 3 );
804	do_action( 'wp_cache_gc' );
805	}
806	}
807
808	function wp_cache_no_postid($id) {
809	return wp_cache_post_change(wp_cache_post_id());
810	}
811
812	function wp_cache_get_postid_from_comment( $comment_id, $status = 'NA' ) {
813	global $super_cache_enabled, $wp_cache_request_uri;
814	$comment = get_comment($comment_id, ARRAY_A);
815	if ( $status != 'NA' ) {
816	$comment[ 'old_comment_approved' ] = $comment[ 'comment_approved' ];
817	$comment[ 'comment_approved' ] = $status;
818	}
819
820	if ( ( $status == 'trash' \|\| $status == 'spam' ) && $comment[ 'comment_approved' ] != 1 ) {
821	// don't modify cache if moderated comments are trashed or spammed
822	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 );
823	return wp_cache_post_id();
824	}
825	$postid = $comment['comment_post_ID'];
826	// Do nothing if comment is not moderated
827	// http://ocaoimh.ie/2006/12/05/caching-wordpress-with-wp-cache-in-a-spam-filled-world
828	if ( !preg_match('/wp-admin\//', $wp_cache_request_uri) ) {
829	if ( $comment['comment_approved'] == 'delete' && ( isset( $comment[ 'old_comment_approved' ] ) && $comment[ 'old_comment_approved' ] == 0 ) ) { // do nothing if moderated comments are deleted
830	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 );
831	return $postid;
832	} elseif ( $comment['comment_approved'] == 'spam' ) {
833	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Spam comment. Don't delete any cache files.", 4 );
834	return $postid;
835	} elseif( $comment['comment_approved'] == '0' ) {
836	if ( $comment[ 'content_type' ] == '' ) {
837	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 );
838	$super_cache_enabled = 0; // don't remove the super cache static file until comment is approved
839	} else {
840	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Moderated ping or trackback. Not deleting cache files..", 4 );
841	return $postid;
842	}
843	}
844	}
845	// We must check it up again due to WP bugs calling two different actions
846	// for delete, for example both wp_set_comment_status and delete_comment
847	// are called when deleting a comment
848	if ($postid > 0) {
849	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Post $postid changed. Update cache.", 4 );
850	return wp_cache_post_change( $postid );
851	} elseif ( $_GET[ 'delete_all' ] != 'Empty Trash' && $_GET[ 'delete_all2' ] != 'Empty Spam' ) {
852	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Unknown post changed. Update cache.", 4 );
853	return wp_cache_post_change( wp_cache_post_id() );
854	}
855	}
856
857	/* Clear out the cache directory. */
858	function wp_cache_clear_cache() {
859	global $cache_path, $wp_cache_object_cache;
860	if ( $wp_cache_object_cache ) {
861	reset_oc_version();
862	} else {
863	prune_super_cache( $cache_path . 'supercache/', true );
864	prune_super_cache( $cache_path, true );
865	}
866	}
867
868	function wp_cache_post_edit($post_id) {
869	global $wp_cache_clear_on_post_edit, $cache_path, $blog_cache_dir;
870	if( $wp_cache_clear_on_post_edit ) {
871	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 );
872	if ( $wp_cache_object_cache ) {
873	reset_oc_version();
874	} else {
875	prune_super_cache( $blog_cache_dir, true );
876	prune_super_cache( $cache_path . 'supercache/', true );
877	}
878	} else {
879	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 );
880	wp_cache_post_change( $post_id );
881	}
882	}
883
884	function wp_cache_post_id_gc( $siteurl, $post_id, $all = 'all' ) {
885	global $cache_path, $wp_cache_object_cache;
886
887	if ( $wp_cache_object_cache )
888	reset_oc_version();
889
890	$post_id = intval( $post_id );
891	if( $post_id == 0 )
892	return;
893
894	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 );
895	$permalink = trailingslashit( str_replace( get_option( 'home' ), '', post_permalink( $post_id ) ) );
896	$dir = $cache_path . 'supercache/' . $siteurl;
897	if ( $all == 'all' ) {
898	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 );
899	prune_super_cache( $dir . $permalink, true, true );
900	do_action( 'gc_cache', 'prune', $permalink );
901	@rmdir( $dir . $permalink );
902	} else {
903	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 );
904	prune_super_cache( $dir . $permalink . 'index.html', true, true );
905	prune_super_cache( $dir . $permalink . 'index.html.gz', true, true );
906	do_action( 'gc_cache', 'prune', $permalink );
907	}
908	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 );
909	prune_super_cache( $dir . 'page/', true );
910	do_action( 'gc_cache', 'prune', '/page/' );
911	}
912
913	function wp_cache_post_change( $post_id ) {
914	global $file_prefix, $cache_path, $blog_id, $super_cache_enabled, $blog_cache_dir, $blogcacheid, $wp_cache_refresh_single_only;
915	static $last_processed = -1;
916
917	if ($post_id == $last_processed) return $post_id;
918	$last_processed = $post_id;
919	$post = get_post( $post_id );
920	if( $post->post_status == 'draft' ) {
921	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 );
922	return $post_id;
923	}
924
925	if( !wp_cache_writers_entry() )
926	return $post_id;
927
928	if ( isset( $wp_cache_refresh_single_only ) && $wp_cache_refresh_single_only && strpos( $_SERVER[ 'REQUEST_URI' ], 'wp-comments-post.php' ) ) {
929	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 );
930	$all = false;
931	} else {
932	$all = true;
933	}
934
935	if ( $wp_cache_object_cache )
936	reset_oc_version();
937
938	$permalink = trailingslashit( str_replace( get_option( 'siteurl' ), '', post_permalink( $post_id ) ) );
939	if( $super_cache_enabled ) {
940	$siteurl = trailingslashit( strtolower( preg_replace( '/:.*$/', '', str_replace( 'http://', '', get_option( 'home' ) ) ) ) );
941	// make sure the front page has a rebuild file
942	if ( $all == true ) {
943	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 );
944	prune_super_cache( $cache_path . 'supercache/' . $siteurl . 'index.html', true, true );
945	prune_super_cache( $cache_path . 'supercache/' . $siteurl . 'index.html.gz', true, true );
946	do_action( 'gc_cache', 'prune', 'homepage' );
947	}
948	wp_cache_post_id_gc( $siteurl, $post_id );
949	if( $all == true && get_option( 'show_on_front' ) == 'page' ) {
950	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 );
951	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 );
952	wp_cache_post_id_gc( $siteurl, get_option( 'page_on_front' ), 'single' );
953	$permalink = trailingslashit( str_replace( get_option( 'home' ), '', post_permalink( get_option( 'page_for_posts' ) ) ) );
954	prune_super_cache( $cache_path . 'supercache/' . $siteurl . $permalink . 'index.html', true, true );
955	prune_super_cache( $cache_path . 'supercache/' . $siteurl . $permalink . 'index.html.gz', true, true );
956	do_action( 'gc_cache', 'prune', $permalink );
957	}
958	}
959
960	$matches = array();
961	if ( ($handle = @opendir( $blog_cache_dir . 'meta/' )) ) {
962	while ( false !== ($file = readdir($handle))) {
963	if ( preg_match("/^({$file_prefix}{$blogcacheid}.*)\.meta/", $file, $matches) ) {
964	$meta_pathname = $blog_cache_dir . 'meta/' . $file;
965	$content_pathname = $blog_cache_dir . $matches[1] . ".html";
966	$meta = unserialize(@file_get_contents($meta_pathname));
967	if( false == is_array( $meta ) ) {
968	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Post change cleaning up stray file: $content_pathname", 4 );
969	@unlink($meta_pathname);
970	@unlink($content_pathname);
971	continue;
972	}
973	if ($post_id > 0 && $meta) {
974	if ( $meta[ 'blog_id' ] == $blog_id && ( ( $all == true && !$meta[ 'post' ] ) \|\| $meta[ 'post' ] == $post_id) ) {
975	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Post change: deleting post cache files for {$meta[ 'uri' ]}: $content_pathname", 4 );
976	@unlink($meta_pathname);
977	@unlink($content_pathname);
978	if ( $super_cache_enabled == true ) {
979	@wp_cache_rebuild_or_delete($cache_path . 'supercache/' . trailingslashit( $meta[ 'uri' ] ) . 'index.html');
980	@wp_cache_rebuild_or_delete($cache_path . 'supercache/' . trailingslashit( $meta[ 'uri' ] ) . 'index.html.gz');
981	do_action( 'gc_cache', 'rebuild', trailingslashit( $meta[ 'uri' ] ) );
982	}
983	}
984	} elseif ($meta[ 'blog_id' ] == $blog_id) {
985	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Post change: deleting cache files for {$meta[ 'uri' ]}: $content_pathname", 4 );
986	@unlink($meta_pathname);
987	@unlink($content_pathname);
988	if ( $super_cache_enabled == true ) {
989	@wp_cache_rebuild_or_delete($cache_path . 'supercache/' . trailingslashit( $meta[ 'uri' ] ) . 'index.html');
990	@wp_cache_rebuild_or_delete($cache_path . 'supercache/' . trailingslashit( $meta[ 'uri' ] ) . 'index.html.gz');
991	do_action( 'gc_cache', 'rebuild', trailingslashit( $meta[ 'uri' ] ) );
992	}
993	}
994
995	}
996	}
997	closedir($handle);
998	}
999	wp_cache_writers_exit();
1000	return $post_id;
1001	}
1002
1003	function wp_cache_microtime_diff($a, $b) {
1004	list($a_dec, $a_sec) = explode(' ', $a);
1005	list($b_dec, $b_sec) = explode(' ', $b);
1006	return $b_sec - $a_sec + $b_dec - $a_dec;
1007	}
1008
1009	function wp_cache_post_id() {
1010	global $posts, $comment_post_ID, $post_ID;
1011	// We try hard all options. More frequent first.
1012	if ($post_ID > 0 ) return $post_ID;
1013	if ($comment_post_ID > 0 ) return $comment_post_ID;
1014	if (is_single() \|\| is_page()) return $posts[0]->ID;
1015	if (isset( $_GET[ 'p' ] ) && $_GET['p'] > 0) return $_GET['p'];
1016	if (isset( $_POST[ 'p' ] ) && $_POST['p'] > 0) return $_POST['p'];
1017	return 0;
1018	}
1019
1020	function wp_cache_gc_cron() {
1021	global $file_prefix, $cache_max_time;
1022
1023	if ( $cache_max_time == 0 )
1024	return false;
1025
1026	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Cache garbage collection.', 5 );
1027
1028	if( !isset( $cache_max_time ) )
1029	$cache_max_time = 600;
1030
1031	$start = time();
1032	if( !wp_cache_phase2_clean_expired($file_prefix ) ) {
1033	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Cache Expiry cron job failed. Probably mutex locked.', 1 );
1034	update_option( 'wpsupercache_gc_time', time() - ( $cache_max_time - 10 ) ); // if GC failed then run it again in one minute
1035	}
1036	if( time() - $start > 30 )
1037	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 );
1038	}
1039
1040	?>
1041