wp-cache.php — WP Super Cache 0.9.3

wp-super-cache / wp-cache.php

wp-super-cache Last commit date

plugins 17 years ago Changelog.txt 17 years ago advanced-cache.php 17 years ago readme.txt 17 years ago wp-cache-base.php 18 years ago wp-cache-config-sample.php 17 years ago wp-cache-phase1.php 17 years ago wp-cache-phase2.php 17 years ago wp-cache.php 17 years ago

wp-cache.php

1415 lines

1	<?php
2	/*
3	Plugin Name: WP Super Cache
4	Plugin URI: http://ocaoimh.ie/wp-super-cache/
5	Description: Very fast caching plugin for WordPress.
6	Version: 0.9.3
7	Author: Donncha O Caoimh
8	Author URI: http://ocaoimh.ie/
9	*/
10
11	/* Copyright 2005-2006 Ricardo Galli Granada (email : gallir@uib.es)
12	Some code copyright 2007-2008 Donncha O Caoimh (http://ocaoimh.ie/)
13
14	This program is free software; you can redistribute it and/or modify
15	it under the terms of the GNU General Public License as published by
16	the Free Software Foundation; either version 2 of the License, or
17	(at your option) any later version.
18
19	This program is distributed in the hope that it will be useful,
20	but WITHOUT ANY WARRANTY; without even the implied warranty of
21	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22	GNU General Public License for more details.
23
24	You should have received a copy of the GNU General Public License
25	along with this program; if not, write to the Free Software
26	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27	*/
28
29	// Pre-2.6 compatibility
30	if( !defined('WP_CONTENT_URL') )
31	define( 'WP_CONTENT_URL', get_option('siteurl') . '/wp-content');
32	if( !defined('WP_CONTENT_DIR') )
33	define( 'WP_CONTENT_DIR', ABSPATH . 'wp-content' );
34
35	$wp_cache_config_file = WP_CONTENT_DIR . '/wp-cache-config.php';
36
37	if( !@include($wp_cache_config_file) ) {
38	get_wpcachehome();
39	$wp_cache_config_file_sample = WPCACHEHOME . 'wp-cache-config-sample.php';
40	@include($wp_cache_config_file_sample);
41	} else {
42	get_wpcachehome();
43	}
44
45	$wp_cache_config_file_sample = WPCACHEHOME . 'wp-cache-config-sample.php';
46	$wp_cache_link = WP_CONTENT_DIR . '/advanced-cache.php';
47	$wp_cache_file = WPCACHEHOME . 'advanced-cache.php';
48
49	include(WPCACHEHOME . 'wp-cache-base.php');
50
51
52	// from legolas558 d0t users dot sf dot net at http://www.php.net/is_writable
53	function is_writeable_ACLSafe($path) {
54
55	// PHP's is_writable does not work with Win32 NTFS
56
57	if ($path{strlen($path)-1}=='/') // recursively return a temporary file path
58	return is_writeable_ACLSafe($path.uniqid(mt_rand()).'.tmp');
59	else if (is_dir($path))
60	return is_writeable_ACLSafe($path.'/'.uniqid(mt_rand()).'.tmp');
61	// check tmp file for read/write capabilities
62	$rm = file_exists($path);
63	$f = @fopen($path, 'a');
64	if ($f===false)
65	return false;
66	fclose($f);
67	if (!$rm)
68	unlink($path);
69	return true;
70	}
71
72	function get_wpcachehome() {
73	if( defined( 'WPCACHEHOME' ) == false ) {
74	if( is_file( dirname(__FILE__) . '/wp-cache-config-sample.php' ) ) {
75	define( 'WPCACHEHOME', trailingslashit( dirname(__FILE__) ) );
76	} elseif( is_file( dirname(__FILE__) . '/wp-super-cache/wp-cache-config-sample.php' ) ) {
77	define( 'WPCACHEHOME', dirname(__FILE__) . '/wp-super-cache/' );
78	} else {
79	die( 'Please create ' . WP_CONTENT_DIR . '/wp-cache-config.php from wp-super-cache/wp-cache-config-sample.php' );
80	}
81	}
82	}
83
84	function wpsupercache_deactivate() {
85	global $wp_cache_config_file, $wp_cache_link, $cache_path;
86	$files = array( $wp_cache_config_file, $wp_cache_link );
87	foreach( $files as $file ) {
88	if( file_exists( $file ) )
89	unlink( $file );
90	}
91	if( !function_exists( 'prune_super_cache' ) )
92	include_once( 'wp-cache-phase2.php' );
93	prune_super_cache ($cache_path, true);
94	@unlink( $cache_path . '.htaccess' );
95	@unlink( $cache_path . 'meta' );
96	@unlink( $cache_path . 'supercache' );
97	}
98	register_deactivation_hook( __FILE__, 'wpsupercache_deactivate' );
99
100	function wp_cache_add_pages() {
101	if( function_exists( 'is_site_admin' ) ) {
102	if( is_site_admin() ) {
103	add_submenu_page('wpmu-admin.php', __('WP Super Cache'), __('WP Super Cache'), 'manage_options', 'wpsupercache', 'wp_cache_manager');
104	add_options_page('WP Super Cache', 'WP Super Cache', 'manage_options', 'wpsupercache', 'wp_cache_manager');
105	}
106	} else {
107	add_options_page('WP Super Cache', 'WP Super Cache', 'manage_options', 'wpsupercache', 'wp_cache_manager');
108	}
109	}
110	add_action('admin_menu', 'wp_cache_add_pages');
111
112	function wp_cache_manager() {
113	global $wp_cache_config_file, $valid_nonce, $supercachedir, $cache_path, $cache_enabled, $cache_compression, $super_cache_enabled, $wp_cache_hello_world;
114	global $wp_cache_clear_on_post_edit, $cache_rebuild_files, $wp_cache_mutex_disabled, $wp_cache_mobile_enabled, $wp_cache_mobile_whitelist, $wp_cache_mobile_browsers;
115	global $wp_cache_cron_check, $wp_cache_debug, $wp_cache_hide_donation;
116
117	if( function_exists( 'is_site_admin' ) )
118	if( !is_site_admin() )
119	return;
120
121	$supercachedir = $cache_path . 'supercache/' . preg_replace('/:.*$/', '', $_SERVER["HTTP_HOST"]);
122	if( get_option( 'gzipcompression' ) == 1 )
123	update_option( 'gzipcompression', 0 );
124	if( !isset( $cache_rebuild_files ) )
125	$cache_rebuild_files = 0;
126
127	$valid_nonce = wp_verify_nonce($_REQUEST['_wpnonce'], 'wp-cache');
128	/* http://www.netlobo.com/div_hiding.html */
129	?>
130	<script type='text/javascript'>
131	<!--
132	function toggleLayer( whichLayer ) {
133	var elem, vis;
134	if( document.getElementById ) // this is the way the standards work
135	elem = document.getElementById( whichLayer );
136	else if( document.all ) // this is the way old msie versions work
137	elem = document.all[whichLayer];
138	else if( document.layers ) // this is the way nn4 works
139	elem = document.layers[whichLayer];
140	vis = elem.style;
141	// if the style.display value is blank we try to figure it out here
142	if(vis.display==''&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined)
143	vis.display = (elem.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none';
144	vis.display = (vis.display==''\|\|vis.display=='block')?'none':'block';
145	}
146	// -->
147	//Clicking header opens fieldset options
148	jQuery(document).ready(function(){
149	jQuery("fieldset h3").css("cursor","pointer").click(function(){
150	jQuery(this).parent("fieldset").find("p,form,ul,blockquote").toggle("slow");
151	});
152	});
153	</script>
154	<?php
155	echo '<div class="wrap">';
156	echo "<h2>WP Super Cache Manager</h2>\n";
157	if( ini_get( 'safe_mode' ) ) {
158	?><h3>Warning! PHP Safe Mode Enabled!</h3>
159	<p>You may experience problems running this plugin because SAFE MODE is enabled. <?php
160	if( !ini_get( 'safe_mode_gid' ) ) {
161	?>Your server is set up to check the owner of PHP scripts before allowing them to read and write files.</p><p>You or an administrator may be able to make it work by changing the group owner of the plugin scripts to match that of the web server user. The group owner of the <?php echo WP_CONTENT_DIR; ?>/cache/ directory must also be changed. See the <a href='http://php.net/features.safe-mode'>safe mode manual page</a> for further details.</p><?php
162	} else {
163	?>You or an administrator must disable this. See the <a href='http://php.net/features.safe-mode'>safe mode manual page</a> for further details. This cannot be disabled in a .htaccess file unfortunately. It must be done in the php.ini config file.</p><?php
164	}
165	}
166	if(isset($_REQUEST['wp_restore_config']) && $valid_nonce) {
167	unlink($wp_cache_config_file);
168	echo '<strong>Configuration file changed, some values might be wrong. Load the page again from the "Settings" menu to reset them.</strong>';
169	}
170
171	if ( !wp_cache_check_link() \|\|
172	!wp_cache_verify_config_file() \|\|
173	!wp_cache_verify_cache_dir() ) {
174	echo "Cannot continue... fix previous problems and retry.";
175	echo "</div>\n";
176	return;
177	}
178
179	if (!wp_cache_check_global_config()) {
180	echo "</div>\n";
181	return;
182	}
183	if( $wp_cache_debug \|\| !$wp_cache_cron_check ) {
184	if( function_exists( "wp_remote_get" ) == false ) {
185	$hostname = str_replace( 'http://', '', str_replace( 'https://', '', get_option( 'siteurl' ) ) );
186	if( strpos( $hostname, '/' ) )
187	$hostname = substr( $hostname, 0, strpos( $hostname, '/' ) );
188	$ip = gethostbyname( $hostname );
189	if( substr( $ip, 0, 3 ) == '127' \|\| substr( $ip, 0, 7 ) == '192.168' ) {
190	?><h3>Warning! Your hostname "<?php echo $hostname; ?>" resolves to <?php echo $ip; ?></h3>
191	<div style='padding:0 8px;color:#9f6000;background-color:#feefb3;border:1px solid #9f6000;'>
192	<p>Your server thinks your hostname resolves to <?php echo $ip; ?>. Some services such as garbage collection by this plugin, and WordPress scheduled posts may not operate correctly.</p>
193	<p>Please see entry 16 in the <a href="http://wordpress.org/extend/plugins/wp-super-cache/faq/">Troubleshooting section</a> of the readme.txt</p>
194	</div>
195	<?php
196	} else {
197	wp_cache_replace_line('^ *\$wp_cache_cron_check', "\$wp_cache_cron_check = 1;", $wp_cache_config_file);
198	}
199	} else {
200	$cron_url = get_option( 'siteurl' ) . '/wp-cron.php?check=' . wp_hash('187425');
201	$cron = wp_remote_get($cron_url, array('timeout' => 0.01, 'blocking' => true));
202	if( is_array( $cron ) ) {
203	if( $cron[ 'response' ][ 'code' ] == '404' ) {
204	?><h3>Warning! wp-cron.php not found!</h3>
205	<div style='padding:0 8px;color:#9f6000;background-color:#feefb3;border:1px solid #9f6000;'>
206	<p>Unfortunately WordPress cannot find the file wp-cron.php. This script is required for the the correct operation of garbage collection by this plugin, WordPress scheduled posts as well as other critical activities.</p>
207	<p>Please see entry 16 in the <a href="http://wordpress.org/extend/plugins/wp-super-cache/faq/">Troubleshooting section</a> of the readme.txt</p>
208	</div>
209	<?php
210	} else {
211	wp_cache_replace_line('^ *\$wp_cache_cron_check', "\$wp_cache_cron_check = 1;", $wp_cache_config_file);
212	}
213	}
214	}
215	}
216
217	if( $cache_enabled == true && $super_cache_enabled == true && !got_mod_rewrite() ) {
218	?><h4 style='color: #a00'>Mod rewrite may not be installed!</h4>
219	<p>It appears that mod_rewrite is not installed. Sometimes this check isn't 100% reliable, especially if you are not using Apache. Please verify that the mod_rewrite module is loaded. It is required for serving Super Cache static files. You will still be able to use WP-Cache.</p><?php
220	}
221
222	if( !is_writeable_ACLSafe($wp_cache_config_file) ) {
223	define( "SUBMITDISABLED", 'disabled style="color: #aaa" ' );
224	?><h4 style='text-align:center; color: #a00'>Read Only Mode. Configuration cannot be changed. <a href="javascript:toggleLayer('readonlywarning');" title="Why your configuration may not be changed">Why</a></h4>
225	<div id='readonlywarning' style='border: 1px solid #aaa; margin: 2px; padding: 2px; display: none;'>
226	<p>The WP Super Cache configuration file is <code><?php echo WP_CONTENT_DIR; ?>/wp-cache-config.php</code> and cannot be modified. The file <?php echo WP_CONTENT_DIR; ?>/wp-cache-config.php must be writeable by the webserver to make any changes.
227	A simple way of doing that is by changing the permissions temporarily using the CHMOD command or through your ftp client. Make sure it's globally writeable and it should be fine.
228	Writeable: <code>chmod 666 <?php echo WP_CONTENT_DIR; ?>/wp-cache-config.php</code>
229	Readonly: <code>chmod 644 <?php echo WP_CONTENT_DIR; ?>/wp-cache-config.php</code></p>
230	</div><?php
231	} else {
232	define( "SUBMITDISABLED", ' ' );
233	}
234
235	// Server could be running as the owner of the wp-content directory. Therefore, if it's
236	// writable, issue a warning only if the permissions aren't 755.
237	if( is_writeable_ACLSafe( WP_CONTENT_DIR . '/' ) ) {
238	$wp_content_stat = stat(WP_CONTENT_DIR . '/');
239	$wp_content_mode = ($wp_content_stat['mode'] & 0777);
240	if( $wp_content_mode != 0755 ) {
241	?><h4 style='text-align:center; color: #a00'>Warning! <?php echo WP_CONTENT_DIR; ?> is writeable!</h4>
242	<p>You should change the permissions on <?php echo WP_CONTENT_DIR; ?> and make it more restrictive. Use your ftp client, or the following command to fix things:<code>chmod 755 <?php echo WP_CONTENT_DIR; ?>/</code></p><?php
243	}
244	}
245
246	if ( $valid_nonce ) {
247	if( isset( $_POST[ 'wp_cache_status' ] ) ) {
248	if( isset( $_POST[ 'wp_cache_mobile_enabled' ] ) ) {
249	$wp_cache_mobile_enabled = 1;
250	} else {
251	$wp_cache_mobile_enabled = 0;
252	}
253	if( $wp_cache_mobile_enabled == 1 ) {
254	if( !isset( $wp_cache_mobile_whitelist ) )
255	wp_cache_replace_line('^ *\$wp_cache_mobile_whitelist', "\$wp_cache_mobile_whitelist = 'Stand Alone/QNws';", $wp_cache_config_file);
256	if( false == isset( $wp_cache_mobile_browsers ) )
257	wp_cache_replace_line('^ *\$wp_cache_mobile_browsers', "\$wp_cache_mobile_browsers = '2.0 MMP, 240x320, AvantGo, BlackBerry, Blazer, Cellphone, Danger, DoCoMo, Elaine/3.0, EudoraWeb, hiptop, IEMobile, iPhone, iPod, KYOCERA/WX310K, LG/U990, MIDP-2.0, MMEF20, MOT-V, NetFront, Newt, Nintendo Wii, Nitro, Nokia, Opera Mini, Palm, Playstation Portable, portalmmm, Proxinet, ProxiNet, SHARP-TQ-GX10, Small, SonyEricsson, Symbian OS, SymbianOS, TS21i-10, UP.Browser, UP.Link, Windows CE, WinWAP';", $wp_cache_config_file);
258	$_POST[ 'wp_cache_status' ] = 'wpcache';
259	}
260	wp_cache_replace_line('^ *\$wp_cache_mobile_enabled', "\$wp_cache_mobile_enabled = " . $wp_cache_mobile_enabled . ";", $wp_cache_config_file);
261	switch( $_POST[ 'wp_cache_status' ] ) {
262	case 'all':
263	wp_cache_enable();
264	break;
265	case 'none':
266	wp_cache_disable();
267	break;
268	case 'wpcache':
269	wp_cache_enable();
270	wp_super_cache_disable();
271	break;
272	}
273	if( isset( $_POST[ 'wp_cache_hello_world' ] ) ) {
274	$wp_cache_hello_world = 1;
275	} else {
276	$wp_cache_hello_world = 0;
277	}
278	wp_cache_replace_line('^ *\$wp_cache_hello_world', '$wp_cache_hello_world = ' . (int)$wp_cache_hello_world . ";", $wp_cache_config_file);
279	if( isset( $_POST[ 'wp_cache_clear_on_post_edit' ] ) ) {
280	$wp_cache_clear_on_post_edit = 1;
281	} else {
282	$wp_cache_clear_on_post_edit = 0;
283	}
284	wp_cache_replace_line('^ *\$wp_cache_clear_on_post_edit', "\$wp_cache_clear_on_post_edit = " . $wp_cache_clear_on_post_edit . ";", $wp_cache_config_file);
285	if( isset( $_POST[ 'cache_rebuild_files' ] ) ) {
286	$cache_rebuild_files = 1;
287	} else {
288	$cache_rebuild_files = 0;
289	}
290	wp_cache_replace_line('^ *\$cache_rebuild_files', "\$cache_rebuild_files = " . $cache_rebuild_files . ";", $wp_cache_config_file);
291	if( isset( $_POST[ 'wp_cache_mutex_disabled' ] ) ) {
292	$wp_cache_mutex_disabled = 0;
293	} else {
294	$wp_cache_mutex_disabled = 1;
295	}
296	wp_cache_replace_line('^ *\$wp_cache_mutex_disabled', "\$wp_cache_mutex_disabled = " . $wp_cache_mutex_disabled . ";", $wp_cache_config_file);
297	}
298	if( isset( $_POST[ 'cache_compression' ] ) && $_POST[ 'cache_compression' ] != $cache_compression ) {
299	$cache_compression_changed = true;
300	$cache_compression = intval( $_POST[ 'cache_compression' ] );
301	wp_cache_replace_line('^ *\$cache_compression', "\$cache_compression = " . $cache_compression . ";", $wp_cache_config_file);
302	if( function_exists( 'prune_super_cache' ) )
303	prune_super_cache ($cache_path, true);
304	delete_option( 'super_cache_meta' );
305	}
306	if( isset( $_POST[ 'wp_cache_hide_donation' ] ) && $_POST[ 'wp_cache_hide_donation' ] != $wp_cache_hide_donation ) {
307	$wp_cache_hide_donation = intval( $_POST[ 'wp_cache_hide_donation' ] );
308	wp_cache_replace_line('^ *\$wp_cache_hide_donation', "\$wp_cache_hide_donation = " . $wp_cache_hide_donation . ";", $wp_cache_config_file);
309	}
310	}
311
312	?>
313	<table><td><fieldset class="options" id="show-this-fieldset">
314	<h3>WP Super Cache Status</h3><?php
315	echo '<form name="wp_manager" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
316	?>
317	<label><input type='radio' name='wp_cache_status' value='all' <?php if( $cache_enabled == true && $super_cache_enabled == true ) { echo 'checked=checked'; } ?>> <strong>ON</strong> <span class="setting-description">WP Cache and Super Cache enabled</span></label><br />
318	<label><input type='radio' name='wp_cache_status' value='wpcache' <?php if( $cache_enabled == true && $super_cache_enabled == false ) { echo 'checked=checked'; } ?>> <strong>HALF ON</strong> <span class="setting-description">Super Cache Disabled, only legacy WP-Cache caching.</span></label><br />
319	<label><input type='radio' name='wp_cache_status' value='none' <?php if( $cache_enabled == false ) { echo 'checked=checked'; } ?>> <strong>OFF</strong> <span class="setting-description">WP Cache and Super Cache disabled</span></label><br />
320	<p><label><input type='checkbox' name='wp_cache_hello_world' <?php if( $wp_cache_hello_world ) echo "checked"; ?> value='1'> Proudly tell the world your server is Digg proof! (places a message in your blog's footer)</label></p>
321	<p><label><input type='checkbox' name='wp_cache_clear_on_post_edit' <?php if( $wp_cache_clear_on_post_edit ) echo "checked"; ?> value='1'> Clear all cache files when a post or page is published. (This may significantly slow down saving of posts.)</label></p>
322	<p><label><input type='checkbox' name='cache_rebuild_files' <?php if( $cache_rebuild_files ) echo "checked"; ?> value='1'> Cache rebuild. Serve a supercache file to anonymous users while a new file is being generated. Recommended for <em>very</em> busy websites with lots of comments. Makes "directly cached pages" and "Lockdown mode" obsolete.</label></p>
323	<p><label><input type='checkbox' name='wp_cache_mutex_disabled' <?php if( !$wp_cache_mutex_disabled ) echo "checked"; ?> value='0'> Coarse file locking. You probably don't need this but it may help if your server is underpowered. Warning! <em>May cause your server to lock up in very rare cases!</em></label></p>
324	<p><label><input type='checkbox' name='wp_cache_mobile_enabled' <?php if( $wp_cache_mobile_enabled ) echo "checked"; ?> value='1'> Mobile device support. Plugin will enter "Half-On" mode.</label></p>
325	<p><strong>Note:</strong> If uninstalling this plugin, make sure the directory <em><?php echo WP_CONTENT_DIR; ?></em> is writeable by the webserver so the files <em>advanced-cache.php</em> and <em>cache-config.php</em> can be deleted automatically. (Making sure those files are writeable too is probably a good idea!)</p>
326	<?php
327	echo "<div class='submit'><input type='submit' " . SUBMITDISABLED . " value='Update Status »' /></div>";
328	wp_nonce_field('wp-cache');
329	?>
330	</form>
331	<?php
332	if( $super_cache_enabled && function_exists( 'apache_get_modules' ) ) {
333	$mods = apache_get_modules();
334	$required_modules = array( 'mod_mime' => 'Required to serve compressed supercache files properly.', 'mod_headers' => 'Required to set caching information on supercache pages. IE7 users will see old pages without this module.', 'mod_expires' => 'Set the expiry date on supercached pages. Visitors may not see new pages when they refresh or leave comments without this module.' );
335	foreach( $required_modules as $req => $desc ) {
336	if( !in_array( $req, $mods ) ) {
337	$missing_mods[ $req ] = $desc;
338	}
339	}
340	if( is_array( $missing_mods ) ) {
341	echo "<h3>Missing Apache Modules</h3>";
342	echo "<p>The following Apache modules are missing. The plugin will work in half-on mode without them. In full Supercache mode, your visitors may see corrupted pages or out of date content however.</p>";
343	echo "<ul>";
344	foreach( $missing_mods as $req => $desc ) {
345	echo "<li> $req - $desc</li>";
346	}
347	echo "</ul>";
348	}
349	}
350	?>
351	</fieldset>
352	</td><td valign='top'>
353	<div style='background: #ffc; border: 1px solid #333; margin: 2px; padding: 5px'>
354	<h3 align='center'>Make WordPress Faster</h3>
355	<?php if( $wp_cache_hide_donation != 1 ) { ?>
356	<p><a href="http://ocaoimh.ie/wp-super-cache/?r=wpsc">WP Super Cache</a> makes your blog go faster. Think that's worth $10? Click the "Donate" button below.</p>
357	<p>Thanks!<br />Donncha O Caoimh.<br /></p>
358	<div align='center'>
359	<form action="https://www.paypal.com/cgi-bin/webscr" method="post">
360	<input type="hidden" name="cmd" value="_s-xclick"/>
361	<input type="hidden" name="hosted_button_id" value="3244504"/>
362	<input type="image" src="https://www.paypal.com/en_GB/i/btn/btn_donate_SM.gif" border="0" name="submit" alt=""/>
363	<img alt="" border="0" src="https://www.paypal.com/en_US/i/scr/pixel.gif" width="1" height="1"/><br />
364	</form>
365	<p>Don't show me this again. <form action="<?php echo $_SERVER["REQUEST_URI"]; ?>" method="post"><input type='hidden' name='wp_cache_hide_donation' value='1' /><input type='submit' value='Hide' /><?php wp_nonce_field('wp-cache'); ?></form></p>
366	</div>
367	<?php } else { ?>
368	<p><a href="http://ocaoimh.ie/wp-super-cache/?r=supercache">WP Super Cache</a> is maintained and developed by <a href="http://ocaoimh.ie/?r=supercache">Donncha O Caoimh</a> with contributions from many others thanks to the GPL.</p>
369	<p>He blogs at <a href="http://ocaoimh.ie/?r=supercache">Holy Shmoly</a> and posts photos at <a href="http://inphotos.org/?r=supercache">In Photos.org</a>. You can say hi to him on <a href="http://twitter.com/donncha/">Twitter</a> too!</p>
370	<?php } ?>
371	</div>
372
373	</td></table>
374	<?php
375
376	wp_cache_files();
377
378	wsc_mod_rewrite();
379
380	wp_cache_edit_max_time();
381
382	echo '<a name="files"></a><fieldset class="options"><h3>Accepted Filenames & Rejected URIs</h3>';
383	wp_cache_edit_rejected();
384	echo "\n";
385	wp_cache_edit_accepted();
386	echo '</fieldset>';
387
388	wp_cache_edit_rejected_ua();
389
390
391	wp_lock_down();
392
393	wp_cache_restore();
394
395	ob_start();
396	if( defined( 'WP_CACHE' ) ) {
397	if( function_exists( 'do_cacheaction' ) ) {
398	do_cacheaction( 'cache_admin_page' );
399	}
400	}
401	$out = ob_get_contents();
402	ob_end_clean();
403	if( SUBMITDISABLED == ' ' && $out != '' ) {
404	echo '<fieldset class="options"><h3>Cache Plugins</h3>';
405	echo $out;
406	echo '</fieldset>';
407	}
408
409	echo "</div>\n";
410	}
411
412	function wsc_mod_rewrite() {
413	global $super_cache_enabled, $cache_compression, $cache_compression_changed, $valid_nonce, $cache_path;
414	if( $super_cache_enabled == false )
415	return;
416	?>
417	<fieldset class="options">
418	<h3>Super Cache Compression</h3>
419	<form name="wp_manager" action="<?php echo $_SERVER["REQUEST_URI"]; ?>" method="post">
420	<label><input type="radio" name="cache_compression" value="1" <?php if( $cache_compression ) { echo "checked=checked"; } ?>> Enabled</label>
421	<label><input type="radio" name="cache_compression" value="0" <?php if( !$cache_compression ) { echo "checked=checked"; } ?>> Disabled</label>
422	<p>Compression is disabled by default because some hosts have problems with compressed files. Switching this on and off clears the cache.</p>
423	<?php
424	if( isset( $cache_compression_changed ) && isset( $_POST[ 'cache_compression' ] ) && !$cache_compression ) {
425	?><p><strong>Super Cache compression is now disabled.</strong></p> <?php
426	} elseif( isset( $cache_compression_changed ) && isset( $_POST[ 'cache_compression' ] ) && $cache_compression ) {
427	?><p><strong>Super Cache compression is now enabled.</strong></p><?php
428	}
429	echo '<div class="submit"><input ' . SUBMITDISABLED . 'type="submit" value="Update Compression »" /></div>';
430	wp_nonce_field('wp-cache');
431	echo "</form>\n";
432	?></fieldset>
433
434	<a name="modrewrite"></a><fieldset class="options">
435	<h3>Mod Rewrite Rules</h3><?php
436	$home_path = get_home_path();
437	$home_root = parse_url(get_bloginfo('url'));
438	$home_root = trailingslashit($home_root['path']);
439	$inst_root = str_replace( '//', '/', '/' . trailingslashit( str_replace( $_SERVER[ 'DOCUMENT_ROOT' ], '', str_replace( '\\', '/', WP_CONTENT_DIR ) ) ) );
440	$wprules = implode( "\n", extract_from_markers( $home_path.'.htaccess', 'WordPress' ) );
441	$wprules = str_replace( "RewriteEngine On\n", '', $wprules );
442	$wprules = str_replace( "RewriteBase $home_root\n", '', $wprules );
443	$scrules = implode( "\n", extract_from_markers( $home_path.'.htaccess', 'WPSuperCache' ) );
444
445	if( substr( get_option( 'permalink_structure' ), -1 ) == '/' ) {
446	$condition_rules[] = "RewriteCond %{REQUEST_URI} !^.*[^/]$";
447	$condition_rules[] = "RewriteCond %{REQUEST_URI} !^.//.$";
448	}
449	$condition_rules[] = "RewriteCond %{REQUEST_METHOD} !=POST";
450	$condition_rules[] = "RewriteCond %{QUERY_STRING} !.=.";
451	$condition_rules[] = "RewriteCond %{HTTP:Cookie} !^.(comment_author_\|wordpress\|wp-postpass_).$";
452	$condition_rules = apply_filters( 'supercacherewriteconditions', $condition_rules );
453
454	$rules = "<IfModule mod_rewrite.c>\n";
455	$rules .= "RewriteEngine On\n";
456	$rules .= "RewriteBase $home_root\n"; // props Chris Messina
457	$charset = get_option('blog_charset') == '' ? 'UTF-8' : get_option('blog_charset');
458	$rules .= "AddDefaultCharset {$charset}\n";
459	$rules .= "CONDITION_RULES";
460	$rules .= "RewriteCond %{HTTP:Accept-Encoding} gzip\n";
461	$rules .= "RewriteCond %{DOCUMENT_ROOT}{$inst_root}cache/supercache/%{HTTP_HOST}{$home_root}$1/index.html.gz -f\n";
462	$rules .= "RewriteRule ^(.*) {$inst_root}cache/supercache/%{HTTP_HOST}{$home_root}$1/index.html.gz [L]\n\n";
463
464	$rules .= "CONDITION_RULES";
465	$rules .= "RewriteCond %{DOCUMENT_ROOT}{$inst_root}cache/supercache/%{HTTP_HOST}{$home_root}$1/index.html -f\n";
466	$rules .= "RewriteRule ^(.*) {$inst_root}cache/supercache/%{HTTP_HOST}{$home_root}$1/index.html [L]\n";
467	$rules .= "</IfModule>\n";
468	$rules = apply_filters( 'supercacherewriterules', $rules );
469
470	$rules = str_replace( "CONDITION_RULES", implode( "\n", $condition_rules ) . "\n", $rules );
471
472	$dohtaccess = true;
473	if( function_exists( 'is_site_admin' ) ) {
474	echo "<h4 style='color: #a00'>WordPress MU Detected</h4><p>Unfortunately the rewrite rules cannot be updated automatically when running WordPress MU. Please open your .htaccess and add the following mod_rewrite rules above any other rules in that file.</p>";
475	} elseif( !$wprules \|\| $wprules == '' ) {
476	echo "<h4 style='color: #a00'>Mod Rewrite rules cannot be updated!</h4>";
477	echo "<p>You must have <strong>BEGIN</strong> and <strong>END</strong> markers in {$home_path}.htaccess for the auto update to work. They look like this and surround the main WordPress mod_rewrite rules:
478	<blockquote><code><em># BEGIN WordPress</em> RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] <em># END WordPress</em></code></blockquote>
479	Refresh this page when you have updated your .htaccess file.";
480	echo "</fieldset></div>";
481	return;
482	} elseif( strpos( $wprules, 'wordpressuser' ) ) { // Need to clear out old mod_rewrite rules
483	echo "<p><strong>Thank you for upgrading.</strong> The mod_rewrite rules changed since you last installed this plugin. Unfortunately you must remove the old supercache rules before the new ones are updated. Refresh this page when you have edited your .htaccess file. If you wish to manually upgrade, change the following line: <blockquote><code>RewriteCond %{HTTP_COOKIE} !^.wordpressuser.\$</code></blockquote> so it looks like this: <blockquote><code>RewriteCond %{HTTP:Cookie} !^.wordpress.\$</code></blockquote> The only changes are 'HTTP_COOKIE' becomes 'HTTP:Cookie' and 'wordpressuser' becomes 'wordpress'. This is a WordPress 2.5 change but it's backwards compatible with older versions if you're brave enough to use them.</p>";
484	echo "</fieldset></div>";
485	return;
486	} elseif( $scrules != '' && strpos( $scrules, '%{REQUEST_URI} !^.*[^/]$' ) === false && substr( get_option( 'permalink_structure' ), -1 ) == '/' ) { // permalink structure has a trailing slash, need slash check in rules.
487	echo "<div style='padding:0 8px;color:#9f6000;background-color:#feefb3;border:1px solid #9f6000;'><h4>Trailing slash check required.</h4><p>It looks like your blog has URLs that end with a '/'. Unfortunately since you installed this plugin a duplicate content bug has been found where URLs not ending in a '/' end serve the same content as those with the '/' and do not redirect to the proper URL.";
488	echo "To fix, you must edit your .htaccess file and add these two rules to the two groups of Super Cache rules:</p>";
489	echo "<blockquote><code>RewriteCond %{REQUEST_URI} !^.[^/]$RewriteCond %{REQUEST_URI} !^.//.*$</code></blockquote>";
490	echo "<p>You can see where the rules go and examine the complete rules by clicking the 'View mod_rewrite rules' link below.</p></div>";
491	$dohtaccess = false;
492	} elseif( strpos( $scrules, 'supercache' ) \|\| strpos( $wprules, 'supercache' ) ) { // only write the rules once
493	$dohtaccess = false;
494	}
495	// cache/.htaccess rules
496	$gziprules = "<IfModule mod_mime.c>\n AddEncoding gzip .gz\n AddType text/html .gz\n</IfModule>\n";
497	$gziprules .= "<IfModule mod_deflate.c>\n SetEnvIfNoCase Request_URI \.gz$ no-gzip\n</IfModule>\n";
498	$gziprules .= "<IfModule mod_headers.c>\n Header set Cache-Control 'max-age=300, must-revalidate'\n</IfModule>\n";
499	$gziprules .= "<IfModule mod_expires.c>\n ExpiresActive On\n ExpiresByType text/html A300\n</IfModule>\n";
500	if( $dohtaccess && !$_POST[ 'updatehtaccess' ] ) {
501	if( !is_writeable_ACLSafe( $home_path . ".htaccess" ) ) {
502	echo "<div style='padding:0 8px;color:#9f6000;background-color:#feefb3;border:1px solid #9f6000;'><h4>Cannot update .htaccess</h4><p>The file <code>{$home_path}.htaccess</code> cannot be modified by the web server. Please correct this using the chmod command or your ftp client.</p><p>Refresh this page when the file permissions have been modified.</p><p>Alternatively, you can edit your <code>{$home_path}.htaccess</code> file manually and add the following code (before any WordPress rules):</p>";
503	echo "<p><pre># BEGIN WPSuperCache\n" . wp_specialchars( $rules ) . "# END WPSuperCache</pre></p></div>";
504	} else {
505	echo "<div style='padding:0 8px;color:#9f6000;background-color:#feefb3;border:1px solid #9f6000;'><p>To serve static html files your server must have the correct mod_rewrite rules added to a file called <code>{$home_path}.htaccess</code> ";
506	if( !function_exists( 'is_site_admin' ) ) {
507	echo "You must edit the file yourself add the following rules.";
508	} else {
509	echo "You can edit the file yourself add the following rules.";
510	}
511	echo " Make sure they appear before any existing WordPress rules.</p>";
512	echo "<pre># BEGIN WPSuperCache\n" . wp_specialchars( $rules ) . "# END WPSuperCache</pre></p>";
513	echo "<p>Rules must be added to " . WP_CONTENT_DIR . "/cache/.htaccess too:</p>";
514	echo "<pre># BEGIN supercache\n" . wp_specialchars( $gziprules ) . "# END supercache</pre></p>";
515	if( !function_exists( 'is_site_admin' ) ) {
516	echo '<form name="updatehtaccess" action="'. $_SERVER["REQUEST_URI"] . '#modrewrite" method="post">';
517	echo '<input type="hidden" name="updatehtaccess" value="1" />';
518	echo '<div class="submit"><input type="submit" ' . SUBMITDISABLED . 'id="updatehtaccess" value="Update Mod_Rewrite Rules »" /></div>';
519	wp_nonce_field('wp-cache');
520	echo "</form></div>\n";
521	}
522	}
523	} elseif( $dohtaccess && $valid_nonce && $_POST[ 'updatehtaccess' ] ) {
524	wpsc_remove_marker( $home_path.'.htaccess', 'WordPress' ); // remove original WP rules so SuperCache rules go on top
525	echo "<div style='padding:0 8px;color:#4f8a10;background-color:#dff2bf;border:1px solid #4f8a10;'>";
526	if( insert_with_markers( $home_path.'.htaccess', 'WPSuperCache', explode( "\n", $rules ) ) && insert_with_markers( $home_path.'.htaccess', 'WordPress', explode( "\n", $wprules ) ) ) {
527	echo "<h4>Mod Rewrite rules updated!</h4>";
528	echo "<p><strong>{$home_path}.htaccess has been updated with the necessary mod_rewrite rules. Please verify they are correct. They should look like this:</strong></p>\n";
529	} else {
530	echo "<h4>Mod Rewrite rules must be updated!</h4>";
531	echo "<p><strong> Your {$home_path}.htaccess is not writable by the webserver and must be updated with the necessary mod_rewrite rules. The new rules go above the regular WordPress rules as shown in the code below:</strong></p>\n";
532	}
533	echo "<p><pre>" . wp_specialchars( $rules ) . "</pre></p>\n</div>";
534	} else {
535	?>
536	<p>WP Super Cache mod rewrite rules were detected in your <?php echo $home_path ?>.htaccess file.<br /> Click the following link to see the lines added to that file. If you have upgraded the plugin make sure these rules match.<br /><br />
537	<a href="javascript:toggleLayer('rewriterules');" class="button">View Mod_Rewrite Rules</a>
538	<div id='rewriterules' style='display: none;'>
539	<?php echo "<p><pre># BEGIN WPSuperCache\n" . wp_specialchars( $rules ) . "# END WPSuperCache</pre></p>\n";
540	echo "<p>Rules must be added to " . WP_CONTENT_DIR ."/cache/.htaccess too:</p>";
541	echo "<pre># BEGIN supercache\n" . wp_specialchars( $gziprules ) . "# END supercache</pre></p>"; ?>
542	</div>
543	<?php
544	}
545	// http://allmybrain.com/2007/11/08/making-wp-super-cache-gzip-compression-work/
546	if( !is_file( $cache_path . '.htaccess' ) ) {
547	$gziprules = insert_with_markers( $cache_path . '.htaccess', 'supercache', explode( "\n", $gziprules ) );
548	echo "<h4>Gzip encoding rules in {$cache_path}.htaccess created.</h4>";
549	}
550
551	?></fieldset><?php
552	}
553
554	function wp_cache_restore() {
555	echo '<fieldset class="options"><h3>Fix Configuration</h3>';
556	echo '<form name="wp_restore" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
557	echo '<input type="hidden" name="wp_restore_config" />';
558	echo '<div class="submit"><input type="submit" ' . SUBMITDISABLED . 'id="deletepost" value="Restore Default Configuration »" /></div>';
559	wp_nonce_field('wp-cache');
560	echo "</form>\n";
561	echo '</fieldset>';
562
563	}
564
565	function comment_form_lockdown_message() {
566	?><p><?php _e( "Comment moderation is enabled. Your comment may take some time to appear." ); ?></p><?php
567	}
568	if( defined( 'WPLOCKDOWN' ) && constant( 'WPLOCKDOWN' ) )
569	add_action( 'comment_form', 'comment_form_lockdown_message' );
570
571	function wp_lock_down() {
572	global $wpdb, $cache_path, $wp_cache_config_file, $valid_nonce, $cached_direct_pages, $cache_enabled, $super_cache_enabled;
573
574	if(isset($_POST['wp_lock_down']) && $valid_nonce) {
575	$wp_lock_down = $_POST['wp_lock_down'] == '1' ? '1' : '0';
576	wp_cache_replace_line('^.*WPLOCKDOWN', "define( 'WPLOCKDOWN', '$wp_lock_down' );", $wp_cache_config_file);
577	if( $wp_lock_down == '0' && function_exists( 'prune_super_cache' ) )
578	prune_super_cache( $cache_path, true ); // clear the cache after lockdown
579
580	}
581	if( !isset( $wp_lock_down ) ) {
582	if( defined( 'WPLOCKDOWN' ) ) {
583	$wp_lock_down = constant( 'WPLOCKDOWN' );
584	} else {
585	$wp_lock_down = '0';
586	}
587	}
588	?><fieldset class="options">
589	<h3>Lock Down: <?php echo $wp_lock_down == '0' ? '<span style="color:red">Disabled</span>' : '<span style="color:green">Enabled</span>'; ?></h3>
590	<p>Prepare your server for an expected spike in traffic by enabling the lock down. When this is enabled, new comments on a post will not refresh the cached static files.</p>
591	<p>Developers: Make your plugin lock down compatible by checking the 'WPLOCKDOWN' constant. The following code will make sure your plugin respects the WPLOCKDOWN setting.
592	<blockquote><code>if( defined( 'WPLOCKDOWN' ) && constant( 'WPLOCKDOWN' ) ) {
593	echo "Sorry. My blog is locked down. Updates will appear shortly";
594	}</code></blockquote>
595	<?php
596	if( $wp_lock_down == '1' ) {
597	?><p>WordPress is locked down. Super Cache static files will not be deleted when new comments are made.</p><?php
598	} else {
599	?><p>WordPress is not locked down. New comments will refresh Super Cache static files as normal.</p><?php
600	}
601	$new_lockdown = $wp_lock_down == '1' ? '0' : '1';
602	$new_lockdown_desc = $wp_lock_down == '1' ? 'Disable' : 'Enable';
603	echo '<form name="wp_lock_down" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
604	echo "<input type='hidden' name='wp_lock_down' value='{$new_lockdown}' />";
605	echo "<div class='submit'><input type='submit' " . SUBMITDISABLED . " value='{$new_lockdown_desc} Lock Down »' /></div>";
606	wp_nonce_field('wp-cache');
607	echo "</form>\n";
608
609	?></fieldset><?php
610	if( $cache_enabled == true && $super_cache_enabled == true ) {
611	?><fieldset class="options">
612	<h3>Directly Cached Files</h3><?php
613
614	$out = '';
615	if( $valid_nonce && is_array( $_POST[ 'direct_pages' ] ) && !empty( $_POST[ 'direct_pages' ] ) ) {
616	$expiredfiles = array_diff( $cached_direct_pages, $_POST[ 'direct_pages' ] );
617	unset( $cached_direct_pages );
618	foreach( $_POST[ 'direct_pages' ] as $page ) {
619	$page = $wpdb->escape( $page );
620	if( $page != '' ) {
621	$cached_direct_pages[] = $page;
622	$out .= "'$page', ";
623	}
624	}
625	if( $out == '' ) {
626	$out = "'', ";
627	}
628	}
629	if( $valid_nonce && $_POST[ 'new_direct_page' ] && '' != $_POST[ 'new_direct_page' ] ) {
630	$page = str_replace( get_option( 'siteurl' ), '', $_POST[ 'new_direct_page' ] );
631	if( substr( $page, 0, 1 ) != '/' )
632	$page = '/' . $page;
633	$page = $wpdb->escape( $page );
634	if( in_array( $page, $cached_direct_pages ) == false ) {
635	$cached_direct_pages[] = $page;
636	$out .= "'$page', ";
637	}
638	}
639
640	if( $out != '' ) {
641	$out = substr( $out, 0, -2 );
642	$out = '$cached_direct_pages = array( ' . $out . ' );';
643	wp_cache_replace_line('^ *\$cached_direct_pages', "$out", $wp_cache_config_file);
644	prune_super_cache( $cache_path, true );
645	}
646
647	if( !empty( $expiredfiles ) ) {
648	foreach( $expiredfiles as $file ) {
649	if( $file != '' ) {
650	$firstfolder = explode( '/', $file );
651	$firstfolder = ABSPATH . $firstfolder[1];
652	$file = ABSPATH . $file;
653	@unlink( trailingslashit( $file ) . 'index.html' );
654	@unlink( trailingslashit( $file ) . 'index.html.gz' );
655	RecursiveFolderDelete( trailingslashit( $firstfolder ) );
656	}
657	}
658	}
659
660	if( $valid_nonce && $_POST[ 'deletepage' ] ) {
661	$page = preg_replace('/[ <>\'\"\r\n\t]/', '', str_replace( '..', '', $_POST['deletepage']) );
662	$pagefile = ABSPATH . $page . 'index.html';
663	$firstfolder = explode( '/', $page );
664	$firstfolder = ABSPATH . $firstfolder[1];
665	$page = ABSPATH . $page;
666	if( is_file( $pagefile ) && is_writeable_ACLSafe( $pagefile ) && is_writeable_ACLSafe( $firstfolder ) ) {
667	@unlink( $pagefile );
668	@unlink( $pagefile . '.gz' );
669	RecursiveFolderDelete( $firstfolder );
670	echo "<strong>$pagefile removed!</strong>";
671	prune_super_cache( $cache_path, true );
672	}
673	}
674
675	$readonly = '';
676	if( !is_writeable_ACLSafe( ABSPATH ) ) {
677	$readonly = 'READONLY';
678	?><p style='padding:0 8px;color:#9f6000;background-color:#feefb3;border:1px solid #9f6000;'><strong>Warning!</strong> You must make <?php echo ABSPATH ?> writable to enable this feature. As this is a security risk please make it readonly after your page is generated.</p><?php
679	} else {
680	?><p style='padding:0 8px;color:#9f6000;background-color:#feefb3;border:1px solid #9f6000;'><strong>Warning!</strong> <?php echo ABSPATH ?> is writable. Please make it readonly after your page is generated as this is a security risk.</p><?php
681	}
682	echo '<form name="direct_page" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
683	if( is_array( $cached_direct_pages ) ) {
684	$out = '';
685	foreach( $cached_direct_pages as $page ) {
686	if( $page == '' )
687	continue;
688	$generated = '';
689	if( is_file( ABSPATH . $page . '/index.html' ) )
690	$generated = '<input type="Submit" name="deletepage" value="' . $page . '">';
691	$out .= "<tr><td><input type='text' $readonly name='direct_pages[]' size='30' value='$page' /></td><td>$generated</td></tr>";
692	}
693	if( $out != '' ) {
694	?><table><tr><th>Existing direct page</th><th>Delete cached file</th></tr><?php
695	echo "$out</table>";
696	}
697	}
698	if( $readonly != 'READONLY' )
699	echo "Add direct page: <input type='text' $readonly name='new_direct_page' size='30' value='' />";
700
701	echo "<p>Directly cached files are files created directly off " . ABSPATH . " where your blog lives. This feature is only useful if you are expecting a major Digg or Slashdot level of traffic to one post or page.</p>";
702	if( $readonly != 'READONLY' ) {
703	echo "<p>For example: to cache <em>'" . trailingslashit( get_option( 'siteurl' ) ) . "about/'</em>, you would enter '" . trailingslashit( get_option( 'siteurl' ) ) . "about/' or '/about/'. The cached file will be generated the next time an anonymous user visits that page.</p>";
704	echo "<p>Make the textbox blank to remove it from the list of direct pages and delete the cached file.</p>";
705	}
706
707	wp_nonce_field('wp-cache');
708	if( $readonly != 'READONLY' )
709	echo "<div class='submit'><input type='submit' ' . SUBMITDISABLED . 'value='Update Direct Pages »' /></div>";
710	echo "</form>\n";
711	?></fieldset><?php
712	} // if $super_cache_enabled
713	}
714
715	function RecursiveFolderDelete ( $folderPath ) { // from http://www.php.net/manual/en/function.rmdir.php
716	if( trailingslashit( constant( 'ABSPATH' ) ) == trailingslashit( $folderPath ) )
717	return false;
718	if ( @is_dir ( $folderPath ) ) {
719	$dh = @opendir($folderPath);
720	while (false !== ($value = @readdir($dh))) {
721	if ( $value != "." && $value != ".." ) {
722	$value = $folderPath . "/" . $value;
723	if ( @is_dir ( $value ) ) {
724	RecursiveFolderDelete ( $value );
725	}
726	}
727	}
728	return @rmdir ( $folderPath );
729	} else {
730	return FALSE;
731	}
732	}
733
734	function wp_cache_edit_max_time () {
735	global $cache_max_time, $wp_cache_config_file, $valid_nonce, $cache_enabled, $super_cache_enabled;
736
737	if( !isset( $cache_max_time ) )
738	$cache_max_time = 3600;
739
740	if(isset($_POST['wp_max_time']) && $valid_nonce) {
741	$max_time = (int)$_POST['wp_max_time'];
742	if ($max_time > 0) {
743	$cache_max_time = $max_time;
744	wp_cache_replace_line('^ *\$cache_max_time', "\$cache_max_time = $cache_max_time;", $wp_cache_config_file);
745	}
746	}
747	?><fieldset class="options">
748	<h3>Expiry Time & Garbage Collection</h3><?php
749	echo '<form name="wp_edit_max_time" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
750	echo '<label for="wp_max_time">Expire time:</label> ';
751	echo "<input type=\"text\" size=6 name=\"wp_max_time\" value=\"$cache_max_time\" /> seconds";
752	echo "<h4>Garbage Collection</h4><p>If expiry time is more than 1800 seconds (half an hour), garbage collection will be done every 10 minutes, otherwise it will happen 10 seconds after the expiry time above.</p>";
753	echo "<p>Checking for and deleting expired files is expensive, but it's expensive leaving them there too. On a very busy site you should set the expiry time to <em>300 seconds</em>. Experiment with different values and visit this page to see how many expired files remain at different times during the day. Aim to have less than 500 cached files if possible.</p>";
754	echo '<div class="submit"><input type="submit" ' . SUBMITDISABLED . 'value="Change Expiration »" /></div>';
755	wp_nonce_field('wp-cache');
756	echo "</form>\n";
757	?></fieldset><?php
758	}
759
760	function wp_cache_sanitize_value($text, & $array) {
761	$text = wp_specialchars(strip_tags($text));
762	$array = preg_split("/[\s,]+/", chop($text));
763	$text = var_export($array, true);
764	$text = preg_replace('/[\s]+/', ' ', $text);
765	return $text;
766	}
767
768	// from tehjosh at gamingg dot net http://uk2.php.net/manual/en/function.apache-request-headers.php#73964
769	// fixed bug in second substr()
770	if( !function_exists('apache_request_headers') ) {
771	function apache_request_headers() {
772	$headers = array();
773	foreach(array_keys($_SERVER) as $skey) {
774	if(substr($skey, 0, 5) == "HTTP_") {
775	$headername = str_replace(" ", "-", ucwords(strtolower(str_replace("_", " ", substr($skey, 5)))));
776	$headers[$headername] = $_SERVER[$skey];
777	}
778	}
779	return $headers;
780	}
781	}
782
783	function wp_cache_edit_rejected_ua() {
784	global $cache_rejected_user_agent, $wp_cache_config_file, $valid_nonce;
785
786	if (!function_exists('apache_request_headers')) return;
787
788	if(isset($_REQUEST['wp_rejected_user_agent']) && $valid_nonce) {
789	$text = wp_cache_sanitize_value($_REQUEST['wp_rejected_user_agent'], $cache_rejected_user_agent);
790	wp_cache_replace_line('^ *\$cache_rejected_user_agent', "\$cache_rejected_user_agent = $text;", $wp_cache_config_file);
791	}
792
793	echo '<a name="user-agents"></a><fieldset class="options"><h3>Rejected User Agents</h3>';
794	echo "<p>Strings in the HTTP 'User Agent' header that prevent WP-Cache from
795	caching bot, spiders, and crawlers' requests.
796	Note that cached files are still sent to these request if they already exists.</p>\n";
797	echo '<form name="wp_edit_rejected_user_agent" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
798	echo '<textarea name="wp_rejected_user_agent" cols="40" rows="4" style="width: 50%; font-size: 12px;" class="code">';
799	foreach ($cache_rejected_user_agent as $ua) {
800	echo wp_specialchars($ua) . "\n";
801	}
802	echo '</textarea> ';
803	echo '<div class="submit"><input type="submit" ' . SUBMITDISABLED . 'value="Save UA Strings »" /></div>';
804	wp_nonce_field('wp-cache');
805	echo '</form>';
806	echo "</fieldset>\n";
807	}
808
809
810	function wp_cache_edit_rejected() {
811	global $cache_acceptable_files, $cache_rejected_uri, $wp_cache_config_file, $valid_nonce;
812
813	if(isset($_REQUEST['wp_rejected_uri']) && $valid_nonce) {
814	$text = wp_cache_sanitize_value($_REQUEST['wp_rejected_uri'], $cache_rejected_uri);
815	wp_cache_replace_line('^ *\$cache_rejected_uri', "\$cache_rejected_uri = $text;", $wp_cache_config_file);
816	}
817
818
819	echo '<form name="wp_edit_rejected" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
820	echo "<p>Add here strings (not a filename) that forces a page not to be cached. For example, if your URLs include year and you dont want to cache last year posts, it's enough to specify the year, i.e. '/2004/'. WP-Cache will search if that string is part of the URI and if so, it will not cache that page.</p>\n";
821	echo '<textarea name="wp_rejected_uri" cols="40" rows="4" style="width: 50%; font-size: 12px;" class="code">';
822	foreach ($cache_rejected_uri as $file) {
823	echo wp_specialchars($file) . "\n";
824	}
825	echo '</textarea> ';
826	echo '<div class="submit"><input type="submit" ' . SUBMITDISABLED . 'value="Save Strings »" /></div>';
827	wp_nonce_field('wp-cache');
828	echo "</form>\n";
829	}
830
831	function wp_cache_edit_accepted() {
832	global $cache_acceptable_files, $cache_rejected_uri, $wp_cache_config_file, $valid_nonce;
833
834	if(isset($_REQUEST['wp_accepted_files']) && $valid_nonce) {
835	$text = wp_cache_sanitize_value($_REQUEST['wp_accepted_files'], $cache_acceptable_files);
836	wp_cache_replace_line('^ *\$cache_acceptable_files', "\$cache_acceptable_files = $text;", $wp_cache_config_file);
837	}
838
839
840	echo '<div style="clear:both"></div><form name="wp_edit_accepted" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
841	echo "<p>Add here those filenames that can be cached, even if they match one of the rejected substring specified above.</p>\n";
842	echo '<textarea name="wp_accepted_files" cols="40" rows="8" style="width: 50%; font-size: 12px;" class="code">';
843	foreach ($cache_acceptable_files as $file) {
844	echo wp_specialchars($file) . "\n";
845	}
846	echo '</textarea> ';
847	echo '<div class="submit"><input type="submit" ' . SUBMITDISABLED . 'value="Save Files »" /></div>';
848	wp_nonce_field('wp-cache');
849	echo "</form>\n";
850	}
851
852	function wp_cache_enable() {
853	global $wp_cache_config_file, $cache_enabled, $supercachedir;
854
855	if(get_option('gzipcompression')) {
856	echo "<strong>Error: GZIP compression is enabled, disable it if you want to enable wp-cache.</strong>";
857	return false;
858	}
859	if( wp_cache_replace_line('^ *\$cache_enabled', '$cache_enabled = true;', $wp_cache_config_file) ) {
860	$cache_enabled = true;
861	}
862	wp_super_cache_enable();
863	}
864
865	function wp_cache_disable() {
866	global $wp_cache_config_file, $cache_enabled;
867
868	if (wp_cache_replace_line('^ *\$cache_enabled', '$cache_enabled = false;', $wp_cache_config_file)) {
869	$cache_enabled = false;
870	}
871	wp_super_cache_disable();
872	}
873	function wp_super_cache_enable() {
874	global $supercachedir, $wp_cache_config_file, $super_cache_enabled;
875
876	if( is_dir( $supercachedir . ".disabled" ) )
877	if( is_dir( $supercachedir ) ) {
878	prune_super_cache( $supercachedir . ".disabled", true );
879	@unlink( $supercachedir . ".disabled" );
880	} else {
881	@rename( $supercachedir . ".disabled", $supercachedir );
882	}
883	wp_cache_replace_line('^ *\$super_cache_enabled', '$super_cache_enabled = true;', $wp_cache_config_file);
884	$super_cache_enabled = true;
885	}
886
887	function wp_super_cache_disable() {
888	global $cache_path, $supercachedir, $wp_cache_config_file, $super_cache_enabled;
889
890	wp_cache_replace_line('^ *\$super_cache_enabled', '$super_cache_enabled = false;', $wp_cache_config_file);
891	if( is_dir( $supercachedir ) )
892	@rename( $supercachedir, $supercachedir . ".disabled" );
893	$super_cache_enabled = false;
894	sleep( 1 ); // allow existing processes to write to the supercachedir and then delete it
895	if (function_exists ('prune_super_cache') && is_dir( $supercachedir ) ) {
896	prune_super_cache( $cache_path, true );
897	}
898	}
899
900	function wp_cache_is_enabled() {
901	global $wp_cache_config_file;
902
903	if(get_option('gzipcompression')) {
904	echo "<strong>Warning</strong>: GZIP compression is enabled in Wordpress, wp-cache will be bypassed until you disable gzip compression.";
905	return false;
906	}
907	$lines = file($wp_cache_config_file);
908	foreach($lines as $line) {
909	if (preg_match('/^ \$cache_enabled = true ;/', $line))
910	return true;
911	}
912	return false;
913	}
914
915
916	function wp_cache_replace_line($old, $new, $my_file) {
917	if (!is_writeable_ACLSafe($my_file)) {
918	echo "Error: file $my_file is not writable.\n";
919	return false;
920	}
921	$found = false;
922	$lines = file($my_file);
923	foreach($lines as $line) {
924	if ( preg_match("/$old/", $line)) {
925	$found = true;
926	break;
927	}
928	}
929	if ($found) {
930	$fd = fopen($my_file, 'w');
931	foreach($lines as $line) {
932	if ( !preg_match("/$old/", $line))
933	fputs($fd, $line);
934	else {
935	fputs($fd, "$new //Added by WP-Cache Manager\n");
936	}
937	}
938	fclose($fd);
939	return true;
940	}
941	$fd = fopen($my_file, 'w');
942	$done = false;
943	foreach($lines as $line) {
944	if ( $done \|\| !preg_match('/^define\|\$\|\?>/', $line))
945	fputs($fd, $line);
946	else {
947	fputs($fd, "$new //Added by WP-Cache Manager\n");
948	fputs($fd, $line);
949	$done = true;
950	}
951	}
952	fclose($fd);
953	return true;
954	}
955
956	function wp_cache_verify_cache_dir() {
957	global $cache_path, $blog_cache_dir, $blogcacheid;
958
959	$dir = dirname($cache_path);
960	if ( !file_exists($cache_path) ) {
961	if ( !is_writeable_ACLSafe( $dir ) \|\| !($dir = mkdir( $cache_path ) ) ) {
962	echo "<strong>Error:</strong> Your cache directory (<strong>$cache_path</strong>) did not exist and couldn't be created by the web server. Check $dir permissions.";
963	return false;
964	}
965	}
966	if ( !is_writeable_ACLSafe($cache_path)) {
967	echo "<strong>Error:</strong> Your cache directory (<strong>$cache_path</strong>) or <strong>$dir</strong> need to be writable for this plugin to work. Double-check it.";
968	return false;
969	}
970
971	if ( '/' != substr($cache_path, -1)) {
972	$cache_path .= '/';
973	}
974
975	if( false == is_dir( $blog_cache_dir ) ) {
976	@mkdir( $cache_path . "blogs" );
977	if( $blog_cache_dir != $cache_path . "blogs/" )
978	@mkdir( $blog_cache_dir );
979	}
980
981	if( false == is_dir( $blog_cache_dir . 'meta' ) )
982	@mkdir( $blog_cache_dir . 'meta' );
983
984	return true;
985	}
986
987	function wp_cache_verify_config_file() {
988	global $wp_cache_config_file, $wp_cache_config_file_sample, $sem_id, $cache_path;
989
990	$new = false;
991	$dir = dirname($wp_cache_config_file);
992
993	if ( file_exists($wp_cache_config_file) ) {
994	$lines = join( ' ', file( $wp_cache_config_file ) );
995	if( strpos( $lines, 'WPCACHEHOME' ) === false ) {
996	if( is_writeable_ACLSafe( $wp_cache_config_file ) ) {
997	@unlink( $wp_cache_config_file );
998	} else {
999	echo "<strong>Error:</strong> Your WP-Cache config file (<strong>$wp_cache_config_file</strong>) is out of date and not writable by the Web server.Please delete it and refresh this page.";
1000	return false;
1001	}
1002	}
1003	} elseif( !is_writeable_ACLSafe($dir)) {
1004	echo "<strong>Error:</strong> Configuration file missing and " . WP_CONTENT_DIR . " directory (<strong>$dir</strong>) is not writable by the Web server.Check its permissions.";
1005	return false;
1006	}
1007
1008	if ( !file_exists($wp_cache_config_file) ) {
1009	if ( !file_exists($wp_cache_config_file_sample) ) {
1010	echo "<strong>Error:</strong> Sample WP-Cache config file (<strong>$wp_cache_config_file_sample</strong>) does not exist.Verify you installation.";
1011	return false;
1012	}
1013	copy($wp_cache_config_file_sample, $wp_cache_config_file);
1014	$dir = str_replace( str_replace( '\\', '/', WP_CONTENT_DIR ), '', str_replace( '\\', '/', dirname(__FILE__) ) );
1015	if( is_file( dirname(__FILE__) . '/wp-cache-config-sample.php' ) ) {
1016	wp_cache_replace_line('WPCACHEHOME', "define( 'WPCACHEHOME', WP_CONTENT_DIR . \"{$dir}/\" );", $wp_cache_config_file);
1017	} elseif( is_file( dirname(__FILE__) . '/wp-super-cache/wp-cache-config-sample.php' ) ) {
1018	wp_cache_replace_line('WPCACHEHOME', "define( 'WPCACHEHOME', WP_CONTENT_DIR . \"{$dir}/wp-super-cache/\" );", $wp_cache_config_file);
1019	}
1020	$new = true;
1021	}
1022	if( $sem_id == 5419 && $cache_path != '' ) {
1023	$sem_id = crc32( $_SERVER[ 'HTTP_HOST' ] . $cache_path ) & 0x7fffffff;
1024	wp_cache_replace_line('sem_id', '$sem_id = ' . $sem_id . ';', $wp_cache_config_file);
1025	}
1026	require($wp_cache_config_file);
1027	return true;
1028	}
1029
1030	function wp_cache_create_advanced_cache() {
1031	global $wp_cache_link, $wp_cache_file;
1032	$ret = true;
1033
1034	$file = file_get_contents( $wp_cache_file );
1035	$file = str_replace( 'CACHEHOME', constant( 'WPCACHEHOME' ), $file );
1036	$fp = @fopen( $wp_cache_link, 'w' );
1037	if( $fp ) {
1038	fputs( $fp, $file );
1039	fclose( $fp );
1040	} else {
1041	$ret = false;
1042	}
1043	return $ret;
1044	}
1045
1046	function wp_cache_check_link() {
1047	global $wp_cache_link, $wp_cache_file;
1048
1049	$ret = true;
1050	if( file_exists($wp_cache_link) ) {
1051	$file = file_get_contents( $wp_cache_link );
1052	if( strpos( $file, "WP SUPER CACHE 0.8.9.1" ) ) {
1053	return true;
1054	} else {
1055	if( !@unlink($wp_cache_link) ) {
1056	$ret = false;
1057	} else {
1058	$ret = wp_cache_create_advanced_cache();
1059	}
1060	}
1061	} else {
1062	$ret = wp_cache_create_advanced_cache();
1063	}
1064
1065	if( false == $ret ) {
1066	echo "<h3>Warning! <em>" . constant( 'WP_CONTENT_DIR' ) . "/advanced-cache.php</em> does not exist or cannot be updated.</h3>";
1067	echo "<p><ul><li>1. If it already exists please delete the file first.</li>";
1068	echo "<li>2. Make " . constant( 'WP_CONTENT_DIR' ) . " writable using the chmod command through your ftp or server software. (<em>chmod 777 " . constant( 'WP_CONTENT_DIR' ) . "</em>) and refresh this page. This is only a temporary measure and you'll have to make it read only afterwards again. (Change 777 to 755 in the previous command)</li>";
1069	echo "<li>3. Refresh this page to update <em>" . constant( 'WP_CONTENT_DIR' ) . "/advanced-cache.php</em></li></ul>";
1070	echo "If that doesn't work, make sure the file <em>" . constant( 'WP_CONTENT_DIR' ) . "/advanced-cache.php</em> doesn't exist:<ol>";
1071	echo "<li>1. Open <em>$wp_cache_file</em> in a text editor.</li><li>2. Change the text <em>CACHEHOME</em> to <em>" . constant( 'WPCACHEHOME' ) . "</em></li><li>3. Save the file and copy it to <em>$wp_cache_link</em> and refresh this page.</li>";
1072	return false;
1073	}
1074	return true;
1075	}
1076
1077	function wp_cache_check_global_config() {
1078	if( defined( 'WP_CACHE' ) )
1079	return true;
1080
1081	if ( file_exists( ABSPATH . 'wp-config.php') ) {
1082	$global = ABSPATH . 'wp-config.php';
1083	} else {
1084	$global = dirname(ABSPATH) . '/wp-config.php';
1085	}
1086
1087	$howtoenable = "Edit <code>$global</code> and add the following line: <code>define('WP_CACHE', true);</code>Otherwise, <strong>WP-Cache will not be executed</strong> by Wordpress core. ";
1088	$lines = file($global);
1089	foreach($lines as $line) {
1090	if (preg_match('/^\sdefine\s$\s\'WP_CACHE\'\s,\s(?i:TRUE\|1)\s$\s*;/', $line)) {
1091	echo $howtoenable;
1092	return false;
1093	}
1094	}
1095	$line = 'define(\'WP_CACHE\', true);';
1096	if (!is_writeable_ACLSafe($global) \|\| !wp_cache_replace_line('define \( \'WP_CACHE\'', $line, $global) ) {
1097	echo "<strong>Error: WP_CACHE is not enabled</strong> in your <code>wp-config.php</code> file and I couldn't modify it.";
1098	echo $howtoenable;
1099	return false;
1100	}
1101	return true;
1102	}
1103
1104	function wp_cache_files() {
1105	global $cache_path, $file_prefix, $cache_max_time, $valid_nonce, $supercachedir, $cache_enabled, $super_cache_enabled, $blog_cache_dir;
1106
1107	if ( '/' != substr($cache_path, -1)) {
1108	$cache_path .= '/';
1109	}
1110
1111	if ( $valid_nonce ) {
1112	if(isset($_REQUEST['wp_delete_cache'])) {
1113	wp_cache_clean_cache($file_prefix);
1114	}
1115	if(isset($_REQUEST['wp_delete_cache_file'])) {
1116	wp_cache_clean_cache($_REQUEST['wp_delete_cache_file']);
1117	}
1118	if(isset($_REQUEST['wp_delete_expired'])) {
1119	wp_cache_clean_expired($file_prefix);
1120	}
1121	}
1122	if(isset($_REQUEST['wp_list_cache'])) {
1123	$list_files = true;
1124	$list_mess = "Update list";
1125	} else
1126	$list_mess = "List files";
1127
1128	echo '<fieldset class="options" id="show-this-fieldset"><h3>Cache Contents</h3>';
1129	/*
1130	echo '<form name="wp_cache_content_list" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
1131	echo '<input type="hidden" name="wp_list_cache" />';
1132	echo '<div class="submit"><input type="submit" ' . SUBMITDISABLED . 'value="'.$list_mess.' »" /></div>';
1133	echo "</form>\n";
1134	*/
1135
1136	$list_files = false; // it doesn't list supercached files, and removing single pages is buggy
1137	$count = 0;
1138	$expired = 0;
1139	$now = time();
1140	if ( ($handle = @opendir( $blog_cache_dir . 'meta/' )) ) {
1141	if ($list_files) echo "<table cellspacing=\"0\" cellpadding=\"5\">";
1142	while ( false !== ($file = readdir($handle))) {
1143	if ( preg_match("/^$file_prefix.*\.meta/", $file) ) {
1144	$this_expired = false;
1145	$content_file = preg_replace("/meta$/", "html", $file);
1146	$mtime = filemtime( $blog_cache_dir . 'meta/' . $file );
1147	if ( ! ( $fsize = @filesize( $blog_cache_dir . $content_file ) ) )
1148	continue; // .meta does not exists
1149	$fsize = intval($fsize/1024);
1150	$age = $now - $mtime;
1151	if ( $age > $cache_max_time ) {
1152	$expired++;
1153	$this_expired = true;
1154	}
1155	$count++;
1156	/*
1157	if ($list_files) {
1158	$meta = new CacheMeta;
1159	$meta = unserialize(file_get_contents($cache_path . 'meta/' . $file));
1160	echo $flip ? '<tr style="background: #EAEAEA;">' : '<tr>';
1161	$flip = !$flip;
1162	echo '<td><a href="http://' . $meta->uri . '" target="_blank" >';
1163	echo $meta->uri . "</a></td>";
1164	if ($this_expired) echo "<td><span style='color:red'>$age secs</span></td>";
1165	else echo "<td>$age secs</td>";
1166	echo "<td>$fsize KB</td>";
1167	echo '<td><form name="wp_delete_cache_file" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
1168	echo '<input type="hidden" name="wp_list_cache" />';
1169	echo '<input type="hidden" name="wp_delete_cache_file" value="'.preg_replace("/^(.*)\.meta$/", "$1", $file).'" />';
1170	echo '<div class="submit"><input id="deletepost" ' . SUBMITDISABLED . 'type="submit" value="Remove" /></div>';
1171	wp_nonce_field('wp-cache');
1172	echo "</form></td></tr>\n";
1173	}
1174	*/
1175	}
1176	}
1177	closedir($handle);
1178	if ($list_files) echo "</table>";
1179	}
1180	if( $cache_enabled == true && $super_cache_enabled == true ) {
1181	$now = time();
1182	$sizes = array( 'expired' => 0, 'cached' => 0, 'ts' => 0 );
1183
1184	if (is_dir($supercachedir)) {
1185	if( $dh = opendir( $supercachedir ) ) {
1186	while( ( $entry = readdir( $dh ) ) !== false ) {
1187	if ($entry != '.' && $entry != '..') {
1188	$sizes = wpsc_dirsize( trailingslashit( $supercachedir ) . $entry, $sizes );
1189	}
1190	}
1191	closedir($dh);
1192	}
1193	} else {
1194	if(is_file($supercachedir) && filemtime( $supercachedir ) + $cache_max_time <= $now )
1195	$sizes[ 'expired' ] ++;
1196	}
1197	$sizes[ 'ts' ] = time();
1198	}
1199
1200	echo "<p><strong>WP-Cache</strong></p>";
1201	echo "<ul><li>$count Cached Pages</li>";
1202	echo "<li>$expired Expired Pages</li></ul>";
1203	if( $cache_enabled == true && $super_cache_enabled == true ) {
1204	echo "<p><strong>WP-Super-Cache</strong></p>";
1205	echo "<ul><li>" . intval($sizes['cached']/2) . " Cached Pages</li>";
1206	$age = intval(($now - $sizes['ts'])/60);
1207	echo "<li>" . intval($sizes['expired']/2) . " Expired Pages</li></ul>";
1208	}
1209	$last_gc = get_option( "wpsupercache_gc_time" );
1210	if( $last_gc ) {
1211	$next_gc = $cache_max_time < 1800 ? $cache_max_time : 600;
1212	echo "<p><strong>Garbage Collection</strong><br />Last: " . date( "Y-m-d H:i:s", ( $last_gc + ( get_option( 'gmt_offset' ) * 3600 ) ) ) . "<br />";
1213	echo "Next: " . date( "Y-m-d H:i:s", ( $next_gc + $last_gc + ( get_option( 'gmt_offset' ) * 3600 ) ) ) . "</p>";
1214	}
1215
1216	echo "<p>Expired files are files older than $cache_max_time seconds. They are still used by the plugin and are deleted periodically.</p>";
1217	echo '<form name="wp_cache_content_expired" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
1218	echo '<input type="hidden" name="wp_delete_expired" />';
1219	echo '<div class="submit" style="float:left"><input type="submit" ' . SUBMITDISABLED . 'value="Delete Expired »" /></div>';
1220	wp_nonce_field('wp-cache');
1221	echo "</form>\n";
1222
1223	echo '<form name="wp_cache_content_delete" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
1224	echo '<input type="hidden" name="wp_delete_cache" />';
1225	echo '<div class="submit" style="float:left;margin-left:10px"><input id="deletepost" type="submit" ' . SUBMITDISABLED . 'value="Delete Cache »" /></div>';
1226	wp_nonce_field('wp-cache');
1227	echo "</form>\n";
1228
1229	echo '</fieldset>';
1230	}
1231
1232	function delete_cache_dashboard() {
1233	if( function_exists( 'is_site_admin' ) && !is_site_admin() )
1234	return false;
1235
1236	if( function_exists('current_user_can') && !current_user_can('manage_options') )
1237	return false;
1238
1239	echo "<li><a href='" . wp_nonce_url( 'options-general.php?page=wpsupercache&wp_delete_cache=1', 'wp-cache' ) . "' target='_blank' title='Delete Super Cache cached files (opens in new window)'>Delete Cache</a></li>";
1240	}
1241	add_action( 'dashmenu', 'delete_cache_dashboard' );
1242
1243	function wpsc_dirsize($directory, $sizes) {
1244	global $cache_max_time;
1245	$now = time();
1246
1247	if (is_dir($directory)) {
1248	if( $dh = opendir( $directory ) ) {
1249	while( ( $entry = readdir( $dh ) ) !== false ) {
1250	if ($entry != '.' && $entry != '..') {
1251	$sizes = wpsc_dirsize( trailingslashit( $directory ) . $entry, $sizes );
1252	}
1253	}
1254	closedir($dh);
1255	}
1256	} else {
1257	if(is_file($directory) ) {
1258	if( filemtime( $directory ) + $cache_max_time <= $now ) {
1259	$sizes[ 'expired' ]+=1;
1260	} else {
1261	$sizes[ 'cached' ]+=1;
1262	}
1263	}
1264	}
1265	return $sizes;
1266	}
1267
1268
1269	function wp_cache_clean_cache($file_prefix) {
1270	global $cache_path, $supercachedir, $blog_cache_dir;
1271
1272	// If phase2 was compiled, use its function to avoid race-conditions
1273	if(function_exists('wp_cache_phase2_clean_cache')) {
1274	if (function_exists ('prune_super_cache')) {
1275	if( is_dir( $supercachedir ) ) {
1276	prune_super_cache( $supercachedir, true );
1277	} elseif( is_dir( $supercachedir . '.disabled' ) ) {
1278	prune_super_cache( $supercachedir . '.disabled', true );
1279	}
1280	prune_super_cache( $cache_path, true );
1281	$_POST[ 'super_cache_stats' ] = 1; // regenerate super cache stats;
1282	}
1283	return wp_cache_phase2_clean_cache($file_prefix);
1284	}
1285
1286	$expr = "/^$file_prefix/";
1287	if ( ($handle = @opendir( $blog_cache_dir )) ) {
1288	while ( false !== ($file = readdir($handle))) {
1289	if ( preg_match($expr, $file) ) {
1290	@unlink( $blog_cache_dir . $file);
1291	@unlink( $blog_cache_dir . 'meta/' . str_replace( '.html', '.meta', $file ) );
1292	}
1293	}
1294	closedir($handle);
1295	}
1296	}
1297
1298	function wp_cache_clean_expired($file_prefix) {
1299	global $cache_path, $cache_max_time, $blog_cache_dir;
1300
1301	// If phase2 was compiled, use its function to avoid race-conditions
1302	if(function_exists('wp_cache_phase2_clean_expired')) {
1303	if (function_exists ('prune_super_cache')) {
1304	$dir = $cache_path . 'supercache/' . preg_replace('/:.*$/', '', $_SERVER["HTTP_HOST"]);
1305	if( is_dir( $dir ) ) {
1306	prune_super_cache( $dir );
1307	} elseif( is_dir( $dir . '.disabled' ) ) {
1308	prune_super_cache( $dir . '.disabled' );
1309	}
1310	$_POST[ 'super_cache_stats' ] = 1; // regenerate super cache stats;
1311	}
1312	return wp_cache_phase2_clean_expired($file_prefix);
1313	}
1314
1315	$expr = "/^$file_prefix/";
1316	$now = time();
1317	if ( ($handle = @opendir( $blog_cache_dir )) ) {
1318	while ( false !== ($file = readdir($handle))) {
1319	if ( preg_match( $expr, $file ) &&
1320	( filemtime( $blog_cache_dir . $file ) + $cache_max_time ) <= $now ) {
1321	@unlink( $blog_cache_dir . $file );
1322	@unlink( $blog_cache_dir . 'meta/' . str_replace( '.html', '.meta', $file ) );
1323	}
1324	}
1325	closedir($handle);
1326	}
1327	}
1328
1329	function wpsc_remove_marker( $filename, $marker ) {
1330	if (!file_exists( $filename ) \|\| is_writeable_ACLSafe( $filename ) ) {
1331	if (!file_exists( $filename ) ) {
1332	return '';
1333	} else {
1334	$markerdata = explode( "\n", implode( '', file( $filename ) ) );
1335	}
1336
1337	$f = fopen( $filename, 'w' );
1338	$foundit = false;
1339	if ( $markerdata ) {
1340	$state = true;
1341	foreach ( $markerdata as $n => $markerline ) {
1342	if (strpos($markerline, '# BEGIN ' . $marker) !== false)
1343	$state = false;
1344	if ( $state ) {
1345	if ( $n + 1 < count( $markerdata ) )
1346	fwrite( $f, "{$markerline}\n" );
1347	else
1348	fwrite( $f, "{$markerline}" );
1349	}
1350	if (strpos($markerline, '# END ' . $marker) !== false) {
1351	$state = true;
1352	}
1353	}
1354	}
1355	return true;
1356	} else {
1357	return false;
1358	}
1359	}
1360
1361	function wp_super_cache_footer() {
1362	?><p id='supercache'><?php bloginfo('name'); ?> is Digg proof thanks to caching by <a href="http://ocaoimh.ie/wp-super-cache/">WP Super Cache</a>!</p><?php
1363	}
1364	if( isset( $wp_cache_hello_world ) && $wp_cache_hello_world )
1365	add_action( 'wp_footer', 'wp_super_cache_footer' );
1366
1367	if( get_option( 'gzipcompression' ) )
1368	update_option( 'gzipcompression', 0 );
1369
1370	// Catch 404 requests. Themes that use query_posts() destroy $wp_query->is_404
1371	function wp_cache_catch_404() {
1372	global $wp_cache_404;
1373	$wp_cache_404 = false;
1374	if( is_404() )
1375	$wp_cache_404 = true;
1376	}
1377	add_action( 'template_redirect', 'wp_cache_catch_404' );
1378
1379	function wp_cache_favorite_action( $actions ) {
1380	if( function_exists( 'is_site_admin' ) && !is_site_admin() )
1381	return $actions;
1382
1383	if( function_exists('current_user_can') && !current_user_can('manage_options') )
1384	return $actions;
1385
1386	$actions[ wp_nonce_url( 'options-general.php?page=wpsupercache&wp_delete_cache=1', 'wp-cache' ) ] = array( __( 'Delete Cache' ), 'manage_options' );
1387
1388	return $actions;
1389	}
1390	add_filter( 'favorite_actions', 'wp_cache_favorite_action' );
1391
1392	function wp_cache_plugin_notice( $plugin ) {
1393	global $cache_enabled;
1394	if( $plugin == 'wp-super-cache/wp-cache.php' && !$cache_enabled && function_exists( "admin_url" ) )
1395	echo '<td colspan="5" class="plugin-update">WP Super Cache must be configured. Go to <a href="' . admin_url( 'options-general.php?page=wpsupercache' ) . '">the admin page</a> to enable and configure the plugin.</td>';
1396	}
1397	add_action( 'after_plugin_row', 'wp_cache_plugin_notice' );
1398
1399	function wp_cache_plugin_actions( $links, $file ) {
1400	if( $file == 'wp-super-cache/wp-cache.php' && function_exists( "admin_url" ) ) {
1401	$settings_link = '<a href="' . admin_url( 'options-general.php?page=wpsupercache' ) . '">' . __('Settings') . '</a>';
1402	array_unshift( $links, $settings_link ); // before other links
1403	}
1404	return $links;
1405	}
1406	add_filter( 'plugin_action_links', 'wp_cache_plugin_actions', 10, 2 );
1407
1408	function wp_cache_admin_notice() {
1409	global $cache_enabled;
1410	if( substr( $_SERVER["PHP_SELF"], -11 ) == 'plugins.php' && !$cache_enabled && function_exists( "admin_url" ) )
1411	echo '<div class="error"><p><strong>' . sprintf( __('WP Super Cache is disabled. Please go to the <a href="%s">plugin admin page</a> to enable caching.' ), admin_url( 'options-general.php?page=wpsupercache' ) ) . '</strong></p></div>';
1412	}
1413	add_action( 'admin_notices', 'wp_cache_admin_notice' );
1414	?>
1415