wp-cache.php — WP Super Cache 0.9.6.1

wp-super-cache / wp-cache.php

wp-super-cache Last commit date

plugins 17 years ago Changelog.txt 16 years ago advanced-cache.php 17 years ago readme.txt 16 years ago uninstall.php 16 years ago wp-cache-base.php 18 years ago wp-cache-config-sample.php 16 years ago wp-cache-phase1.php 16 years ago wp-cache-phase2.php 16 years ago wp-cache.php 16 years ago

wp-cache.php

1517 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: 0.9.6.1
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, $wp_cache_not_logged_in;
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	$valid_nonce = isset($_REQUEST['_wpnonce']) ? wp_verify_nonce($_REQUEST['_wpnonce'], 'wp-cache') : false;
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 = 'Android, 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	}
259	wp_cache_replace_line('^ *\$wp_cache_mobile_enabled', "\$wp_cache_mobile_enabled = " . $wp_cache_mobile_enabled . ";", $wp_cache_config_file);
260	switch( $_POST[ 'wp_cache_status' ] ) {
261	case 'all':
262	wp_cache_enable();
263	break;
264	case 'none':
265	wp_cache_disable();
266	break;
267	case 'wpcache':
268	wp_cache_enable();
269	wp_super_cache_disable();
270	break;
271	}
272	if( isset( $_POST[ 'wp_cache_hello_world' ] ) ) {
273	$wp_cache_hello_world = 1;
274	} else {
275	$wp_cache_hello_world = 0;
276	}
277	wp_cache_replace_line('^ *\$wp_cache_hello_world', '$wp_cache_hello_world = ' . (int)$wp_cache_hello_world . ";", $wp_cache_config_file);
278	if( isset( $_POST[ 'wp_cache_clear_on_post_edit' ] ) ) {
279	$wp_cache_clear_on_post_edit = 1;
280	} else {
281	$wp_cache_clear_on_post_edit = 0;
282	}
283	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);
284	if( isset( $_POST[ 'cache_rebuild_files' ] ) ) {
285	$cache_rebuild_files = 1;
286	} else {
287	$cache_rebuild_files = 0;
288	}
289	wp_cache_replace_line('^ *\$cache_rebuild_files', "\$cache_rebuild_files = " . $cache_rebuild_files . ";", $wp_cache_config_file);
290	if( isset( $_POST[ 'wp_cache_mutex_disabled' ] ) ) {
291	$wp_cache_mutex_disabled = 0;
292	} else {
293	$wp_cache_mutex_disabled = 1;
294	}
295	if( defined( 'WPSC_DISABLE_LOCKING' ) ) {
296	$wp_cache_mutex_disabled = 1;
297	}
298	wp_cache_replace_line('^ *\$wp_cache_mutex_disabled', "\$wp_cache_mutex_disabled = " . $wp_cache_mutex_disabled . ";", $wp_cache_config_file);
299	if( isset( $_POST[ 'wp_cache_not_logged_in' ] ) ) {
300	if( $wp_cache_not_logged_in == 0 && function_exists( 'prune_super_cache' ) )
301	prune_super_cache ($cache_path, true);
302	$wp_cache_not_logged_in = 1;
303	} else {
304	$wp_cache_not_logged_in = 0;
305	}
306	wp_cache_replace_line('^ *\$wp_cache_not_logged_in', "\$wp_cache_not_logged_in = " . $wp_cache_not_logged_in . ";", $wp_cache_config_file);
307	}
308	if( defined( 'WPSC_DISABLE_COMPRESSION' ) ) {
309	$cache_compression_changed = false;
310	$cache_compression = 0;
311	wp_cache_replace_line('^ *\$cache_compression', "\$cache_compression = " . $cache_compression . ";", $wp_cache_config_file);
312	} elseif( isset( $_POST[ 'cache_compression' ] ) && $_POST[ 'cache_compression' ] != $cache_compression ) {
313	$cache_compression_changed = true;
314	$cache_compression = intval( $_POST[ 'cache_compression' ] );
315	wp_cache_replace_line('^ *\$cache_compression', "\$cache_compression = " . $cache_compression . ";", $wp_cache_config_file);
316	if( function_exists( 'prune_super_cache' ) )
317	prune_super_cache ($cache_path, true);
318	delete_option( 'super_cache_meta' );
319	}
320	if( isset( $_POST[ 'wp_cache_hide_donation' ] ) && $_POST[ 'wp_cache_hide_donation' ] != $wp_cache_hide_donation ) {
321	$wp_cache_hide_donation = intval( $_POST[ 'wp_cache_hide_donation' ] );
322	wp_cache_replace_line('^ *\$wp_cache_hide_donation', "\$wp_cache_hide_donation = " . $wp_cache_hide_donation . ";", $wp_cache_config_file);
323	}
324	}
325
326	?>
327	<table><td><fieldset class="options" id="show-this-fieldset">
328	<h3>WP Super Cache Status</h3><?php
329	echo '<form name="wp_manager" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
330	?>
331	<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 />
332	<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 />
333	<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 />
334	<p><label><input type='checkbox' name='wp_cache_not_logged_in' <?php if( $wp_cache_not_logged_in ) echo "checked"; ?> value='1'> Don't cache pages for logged in users.</label></p>
335	<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>
336	<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>
337	<p><label><input type='checkbox' name='cache_rebuild_files' <?php if( $cache_rebuild_files ) echo "checked"; ?> value='1'> Cache rebuild. Serve a supercache file to anonymous users while a new file is being generated. Recommended for <em>very</em> busy websites with lots of comments. Makes "directly cached pages" and "Lockdown mode" obsolete.</label></p>
338	<?php if( false == defined( 'WPSC_DISABLE_LOCKING' ) ) { ?>
339	<p><label><input type='checkbox' name='wp_cache_mutex_disabled' <?php if( !$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>
340	<?php } ?>
341	<p><label><input type='checkbox' name='wp_cache_mobile_enabled' <?php if( $wp_cache_mobile_enabled ) echo "checked"; ?> value='1'> Mobile device support.</label>
342	<?php
343	$home_path = trailingslashit( get_home_path() );
344	if ( false === strpos( implode( "\n", extract_from_markers( $home_path.'.htaccess', 'WPSuperCache' ) ), 'SHARP-TQ-GX10' ) ) { // we don't have the rewrite rules
345	?>
346	<blockquote><p>Mobile support requires extra rules in your .htaccess file, or you can set the plugin to half-on mode. Here's your options (in order of difficulty):
347	<ol><li> 1. Set the plugin to half on mode and enable mobile support.</li>
348	<li> 2. Delete the plugin mod_rewrite rules in <?php echo $home_path; ?>.htaccess enclosed by <code># BEGIN WPSuperCache</code> and <code># END WPSuperCache</code> and let the plugin regenerate them by reloading this page.</li>
349	<li> 3. Add the rules yourself. Edit <?php echo $home_path; ?>.htaccess and find the block of code enclosed by the lines <code># BEGIN WPSuperCache</code> and <code># END WPSuperCache</code>. There are two sections that look very similar. Just below the line <code>%{HTTP:Cookie} !^.(comment_author_\|wordpress\|wp-postpass_).$</code> add this line: (do it twice, once for each section)</p>
350	<div style='border: 1px solid #333; width:400px; overflow: scroll'><pre>RewriteCond %{HTTP_user_agent} !^.(Android\|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).</pre></div></li></ol></blockquote>
351	<?php } ?>
352	<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>
353	<p>Uninstall using the <a href="<?php echo WP_PLUGIN_URL; ?>/wp-super-cache/uninstall.php">uninstall script</a> to remove files and directories created by the plugin. (Please see <a href="<?php echo WP_PLUGIN_URL; ?>/wp-super-cache/readme.txt">readme.txt</a> for instructions on uninstalling this script.)</p>
354	<?php
355	echo "<div class='submit'><input type='submit' " . SUBMITDISABLED . " value='Update Status »' /></div>";
356	wp_nonce_field('wp-cache');
357	?>
358	</form>
359	<?php
360	if( $super_cache_enabled && function_exists( 'apache_get_modules' ) ) {
361	$mods = apache_get_modules();
362	$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.' );
363	foreach( $required_modules as $req => $desc ) {
364	if( !in_array( $req, $mods ) ) {
365	$missing_mods[ $req ] = $desc;
366	}
367	}
368	if( isset( $missing_mods) && is_array( $missing_mods ) ) {
369	echo "<h3>Missing Apache Modules</h3>";
370	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>";
371	echo "<ul>";
372	foreach( $missing_mods as $req => $desc ) {
373	echo "<li> $req - $desc</li>";
374	}
375	echo "</ul>";
376	}
377	}
378	?>
379	</fieldset>
380	</td><td valign='top'>
381	<div style='background: #ffc; border: 1px solid #333; margin: 2px; padding: 5px'>
382	<h3 align='center'>Make WordPress Faster</h3>
383	<?php if( $wp_cache_hide_donation != 1 ) { ?>
384	<p><a href="http://ocaoimh.ie/wp-super-cache/?r=wpsc">WP Super Cache</a> really makes your blog go faster. Make it go faster<sup>*</sup> by buying me an <a href="http://ocaoimh.ie/agc">Amazon gift card</a>! Make it out to "donncha@ocaoimh.ie". A £10 card would be nice but it's up to you how much you think this plugin is worth to you.</p>
385	<p>If Amazon isn't your thing, there's also PayPal. Click the "Donate" button below or take a quick peek at my <a href="http://ocaoimh.ie/wish">wishlist</a>.</p>
386	<p>Thanks in advance!<br />Donncha<br />
387	<small>* Ok, it won't go any faster but you'll make this plugin author very happy!</small></p>
388	<div align='center'>
389	<form action="https://www.paypal.com/cgi-bin/webscr" method="post">
390	<input type="hidden" name="cmd" value="_s-xclick"/>
391	<input type="hidden" name="hosted_button_id" value="3244504"/>
392	<input type="image" src="https://www.paypal.com/en_GB/i/btn/btn_donate_SM.gif" border="0" name="submit" alt=""/>
393	<img alt="" border="0" src="https://www.paypal.com/en_US/i/scr/pixel.gif" width="1" height="1"/><br />
394	</form>
395	<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>
396	</div>
397	<?php } else { ?>
398	<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.</p>
399	<p>He blogs at <a href="http://ocaoimh.ie/?r=supercache">Holy Shmoly</a>, posts photos at <a href="http://inphotos.org/?r=supercache">In Photos.org</a> and <a href="http://ocaoimh.ie/gad">wishes</a> he had more time to read and relax.</p><p>Please say hi to him on <a href="http://twitter.com/donncha/">Twitter</a> too!</p>
400	<?php } ?>
401	</div>
402
403	</td></table>
404	<?php
405
406	wp_cache_files();
407
408	wsc_mod_rewrite();
409
410	wp_cache_edit_max_time();
411
412	echo '<a name="files"></a><fieldset class="options"><h3>Accepted Filenames & Rejected URIs</h3>';
413	wp_cache_edit_rejected_pages();
414	echo "\n";
415	wp_cache_edit_rejected();
416	echo "\n";
417	wp_cache_edit_accepted();
418	echo '</fieldset>';
419
420	wp_cache_edit_rejected_ua();
421
422
423	wp_lock_down();
424
425	wp_cache_restore();
426
427	ob_start();
428	if( defined( 'WP_CACHE' ) ) {
429	if( function_exists( 'do_cacheaction' ) ) {
430	do_cacheaction( 'cache_admin_page' );
431	}
432	}
433	$out = ob_get_contents();
434	ob_end_clean();
435	if( SUBMITDISABLED == ' ' && $out != '' ) {
436	echo '<fieldset class="options"><h3>Cache Plugins</h3>';
437	echo $out;
438	echo '</fieldset>';
439	}
440
441	echo "</div>\n";
442	}
443
444	function wsc_mod_rewrite() {
445	global $super_cache_enabled, $cache_compression, $cache_compression_changed, $valid_nonce, $cache_path;
446	if( $super_cache_enabled == false )
447	return;
448	if( false == defined( 'WPSC_DISABLE_COMPRESSION' ) ) {
449	?>
450	<fieldset class="options">
451	<h3>Super Cache Compression</h3>
452	<form name="wp_manager" action="<?php echo $_SERVER["REQUEST_URI"]; ?>" method="post">
453	<label><input type="radio" name="cache_compression" value="1" <?php if( $cache_compression ) { echo "checked=checked"; } ?>> Enabled</label>
454	<label><input type="radio" name="cache_compression" value="0" <?php if( !$cache_compression ) { echo "checked=checked"; } ?>> Disabled</label>
455	<p>Compression is disabled by default because some hosts have problems with compressed files. Switching this on and off clears the cache.</p>
456	<?php
457	if( isset( $cache_compression_changed ) && isset( $_POST[ 'cache_compression' ] ) && !$cache_compression ) {
458	?><p><strong>Super Cache compression is now disabled.</strong></p> <?php
459	} elseif( isset( $cache_compression_changed ) && isset( $_POST[ 'cache_compression' ] ) && $cache_compression ) {
460	?><p><strong>Super Cache compression is now enabled.</strong></p><?php
461	}
462	echo '<div class="submit"><input ' . SUBMITDISABLED . 'type="submit" value="Update Compression »" /></div>';
463	wp_nonce_field('wp-cache');
464	echo "</form>\n";
465	?></fieldset>
466	<?php } ?>
467
468	<a name="modrewrite"></a><fieldset class="options">
469	<h3>Mod Rewrite Rules</h3><?php
470	if ( isset( $_SERVER[ "PHP_DOCUMENT_ROOT" ] ) ) {
471	$document_root = $_SERVER[ "PHP_DOCUMENT_ROOT" ];
472	$apache_root = $_SERVER[ "PHP_DOCUMENT_ROOT" ];
473	} else {
474	$document_root = $_SERVER[ "DOCUMENT_ROOT" ];
475	$apache_root = '%{DOCUMENT_ROOT}';
476	}
477	$home_path = get_home_path();
478	$home_root = parse_url(get_bloginfo('url'));
479	$home_root = trailingslashit($home_root['path']);
480	$home_root = isset( $home_root['path'] ) ? trailingslashit( $home_root['path'] ) : '/';
481	$inst_root = str_replace( '//', '/', '/' . trailingslashit( str_replace( $document_root, '', str_replace( '\\', '/', WP_CONTENT_DIR ) ) ) );
482	$wprules = implode( "\n", extract_from_markers( $home_path.'.htaccess', 'WordPress' ) );
483	$wprules = str_replace( "RewriteEngine On\n", '', $wprules );
484	$wprules = str_replace( "RewriteBase $home_root\n", '', $wprules );
485	$scrules = implode( "\n", extract_from_markers( $home_path.'.htaccess', 'WPSuperCache' ) );
486
487	if( substr( get_option( 'permalink_structure' ), -1 ) == '/' ) {
488	$condition_rules[] = "RewriteCond %{REQUEST_URI} !^.*[^/]$";
489	$condition_rules[] = "RewriteCond %{REQUEST_URI} !^.//.$";
490	}
491	$condition_rules[] = "RewriteCond %{REQUEST_METHOD} !=POST";
492	$condition_rules[] = "RewriteCond %{QUERY_STRING} !.=.";
493	$condition_rules[] = "RewriteCond %{HTTP:Cookie} !^.(comment_author_\|wordpress\|wp-postpass_).$";
494	$condition_rules[] = "RewriteCond %{HTTP_user_agent} !^.(Android\|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).";
495	$condition_rules = apply_filters( 'supercacherewriteconditions', $condition_rules );
496
497	$rules = "<IfModule mod_rewrite.c>\n";
498	$rules .= "RewriteEngine On\n";
499	$rules .= "RewriteBase $home_root\n"; // props Chris Messina
500	$charset = get_option('blog_charset') == '' ? 'UTF-8' : get_option('blog_charset');
501	$rules .= "AddDefaultCharset {$charset}\n";
502	$rules .= "CONDITION_RULES";
503	$rules .= "RewriteCond %{HTTP:Accept-Encoding} gzip\n";
504	$rules .= "RewriteCond {$apache_root}{$inst_root}cache/supercache/%{HTTP_HOST}{$home_root}$1/index.html.gz -f\n";
505	$rules .= "RewriteRule ^(.*) {$inst_root}cache/supercache/%{HTTP_HOST}{$home_root}$1/index.html.gz [L]\n\n";
506
507	$rules .= "CONDITION_RULES";
508	$rules .= "RewriteCond {$apache_root}{$inst_root}cache/supercache/%{HTTP_HOST}{$home_root}$1/index.html -f\n";
509	$rules .= "RewriteRule ^(.*) {$inst_root}cache/supercache/%{HTTP_HOST}{$home_root}$1/index.html [L]\n";
510	$rules .= "</IfModule>\n";
511	$rules = apply_filters( 'supercacherewriterules', $rules );
512
513	$rules = str_replace( "CONDITION_RULES", implode( "\n", $condition_rules ) . "\n", $rules );
514
515	$dohtaccess = true;
516	if( function_exists( 'is_site_admin' ) ) {
517	echo "<h4 style='color: #a00'>WordPress MU Detected</h4><p>Unfortunately the rewrite rules cannot be updated automatically when running WordPress MU. Please open your .htaccess and add the following mod_rewrite rules above any other rules in that file.</p>";
518	} elseif( !$wprules \|\| $wprules == '' ) {
519	echo "<h4 style='color: #a00'>Mod Rewrite rules cannot be updated!</h4>";
520	echo "<p>You must have <strong>BEGIN</strong> and <strong>END</strong> markers in {$home_path}.htaccess for the auto update to work. They look like this and surround the main WordPress mod_rewrite rules:
521	<blockquote><pre><em># BEGIN WordPress</em>\n RewriteCond %{REQUEST_FILENAME} !-f\n RewriteCond %{REQUEST_FILENAME} !-d\n RewriteRule . /index.php [L]\n <em># END WordPress</em></pre></blockquote>
522	Refresh this page when you have updated your .htaccess file.";
523	echo "</fieldset></div>";
524	return;
525	} elseif( strpos( $wprules, 'wordpressuser' ) ) { // Need to clear out old mod_rewrite rules
526	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>";
527	echo "</fieldset></div>";
528	return;
529	} elseif( $scrules != '' && strpos( $scrules, '%{REQUEST_URI} !^.*[^/]$' ) === false && substr( get_option( 'permalink_structure' ), -1 ) == '/' ) { // permalink structure has a trailing slash, need slash check in rules.
530	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.";
531	echo "To fix, you must edit your .htaccess file and add these two rules to the two groups of Super Cache rules:</p>";
532	echo "<blockquote><code>RewriteCond %{REQUEST_URI} !^.[^/]$RewriteCond %{REQUEST_URI} !^.//.*$</code></blockquote>";
533	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>";
534	$dohtaccess = false;
535	} elseif( strpos( $scrules, 'supercache' ) \|\| strpos( $wprules, 'supercache' ) ) { // only write the rules once
536	$dohtaccess = false;
537	}
538	// cache/.htaccess rules
539	$gziprules = "<IfModule mod_mime.c>\n <FilesMatch \"\\.html\\.gz\$\">\n ForceType text/html\n FileETag None\n </FilesMatch>\n AddEncoding gzip .gz\n AddType text/html .gz\n</IfModule>\n";
540	$gziprules .= "<IfModule mod_deflate.c>\n SetEnvIfNoCase Request_URI \.gz$ no-gzip\n</IfModule>\n";
541	$gziprules .= "<IfModule mod_headers.c>\n Header set Cache-Control 'max-age=300, must-revalidate'\n</IfModule>\n";
542	$gziprules .= "<IfModule mod_expires.c>\n ExpiresActive On\n ExpiresByType text/html A300\n</IfModule>\n";
543	if( $dohtaccess && !$_POST[ 'updatehtaccess' ] ) {
544	if( !is_writeable_ACLSafe( $home_path . ".htaccess" ) ) {
545	echo "<div style='padding:0 8px;color:#9f6000;background-color:#feefb3;border:1px solid #9f6000;'><h4>Cannot update .htaccess</h4><p>The file <code>{$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>";
546	echo "<p><pre># BEGIN WPSuperCache\n" . wp_specialchars( $rules ) . "# END WPSuperCache</pre></p></div>";
547	} else {
548	echo "<div style='padding:0 8px;color:#9f6000;background-color:#feefb3;border:1px solid #9f6000;'><p>To serve static html files your server must have the correct mod_rewrite rules added to a file called <code>{$home_path}.htaccess</code> ";
549	if( !function_exists( 'is_site_admin' ) ) {
550	echo "You must edit the file yourself add the following rules.";
551	} else {
552	echo "You can edit the file yourself add the following rules.";
553	}
554	echo " Make sure they appear before any existing WordPress rules.</p>";
555	echo "<pre># BEGIN WPSuperCache\n" . wp_specialchars( $rules ) . "# END WPSuperCache</pre></p>";
556	echo "<p>Rules must be added to " . WP_CONTENT_DIR . "/cache/.htaccess too:</p>";
557	echo "<pre># BEGIN supercache\n" . wp_specialchars( $gziprules ) . "# END supercache</pre></p>";
558	if( !function_exists( 'is_site_admin' ) ) {
559	echo '<form name="updatehtaccess" action="'. $_SERVER["REQUEST_URI"] . '#modrewrite" method="post">';
560	echo '<input type="hidden" name="updatehtaccess" value="1" />';
561	echo '<div class="submit"><input type="submit" ' . SUBMITDISABLED . 'id="updatehtaccess" value="Update Mod_Rewrite Rules »" /></div>';
562	wp_nonce_field('wp-cache');
563	echo "</form></div>\n";
564	}
565	}
566	} elseif( $dohtaccess && $valid_nonce && $_POST[ 'updatehtaccess' ] ) {
567	wpsc_remove_marker( $home_path.'.htaccess', 'WordPress' ); // remove original WP rules so SuperCache rules go on top
568	echo "<div style='padding:0 8px;color:#4f8a10;background-color:#dff2bf;border:1px solid #4f8a10;'>";
569	if( insert_with_markers( $home_path.'.htaccess', 'WPSuperCache', explode( "\n", $rules ) ) && insert_with_markers( $home_path.'.htaccess', 'WordPress', explode( "\n", $wprules ) ) ) {
570	echo "<h4>Mod Rewrite rules updated!</h4>";
571	echo "<p><strong>{$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";
572	} else {
573	echo "<h4>Mod Rewrite rules must be updated!</h4>";
574	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";
575	}
576	echo "<p><pre>" . wp_specialchars( $rules ) . "</pre></p>\n</div>";
577	} else {
578	?>
579	<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 />
580	<a href="javascript:toggleLayer('rewriterules');" class="button">View Mod_Rewrite Rules</a>
581	<div id='rewriterules' style='display: none;'>
582	<?php echo "<p><pre># BEGIN WPSuperCache\n" . wp_specialchars( $rules ) . "# END WPSuperCache</pre></p>\n";
583	echo "<p>Rules must be added to " . WP_CONTENT_DIR ."/cache/.htaccess too:</p>";
584	echo "<pre># BEGIN supercache\n" . wp_specialchars( $gziprules ) . "# END supercache</pre></p>"; ?>
585	</div>
586	<?php
587	}
588	// http://allmybrain.com/2007/11/08/making-wp-super-cache-gzip-compression-work/
589	if( !is_file( $cache_path . '.htaccess' ) ) {
590	$gziprules = insert_with_markers( $cache_path . '.htaccess', 'supercache', explode( "\n", $gziprules ) );
591	echo "<h4>Gzip encoding rules in {$cache_path}.htaccess created.</h4>";
592	}
593
594	?></fieldset><?php
595	}
596
597	function wp_cache_restore() {
598	echo '<fieldset class="options"><h3>Fix Configuration</h3>';
599	echo '<form name="wp_restore" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
600	echo '<input type="hidden" name="wp_restore_config" />';
601	echo '<div class="submit"><input type="submit" ' . SUBMITDISABLED . 'id="deletepost" value="Restore Default Configuration »" /></div>';
602	wp_nonce_field('wp-cache');
603	echo "</form>\n";
604	echo '</fieldset>';
605
606	}
607
608	function comment_form_lockdown_message() {
609	?><p><?php _e( "Comment moderation is enabled. Your comment may take some time to appear." ); ?></p><?php
610	}
611	if( defined( 'WPLOCKDOWN' ) && constant( 'WPLOCKDOWN' ) )
612	add_action( 'comment_form', 'comment_form_lockdown_message' );
613
614	function wp_lock_down() {
615	global $wpdb, $cache_path, $wp_cache_config_file, $valid_nonce, $cached_direct_pages, $cache_enabled, $super_cache_enabled;
616
617	if(isset($_POST['wp_lock_down']) && $valid_nonce) {
618	$wp_lock_down = $_POST['wp_lock_down'] == '1' ? '1' : '0';
619	wp_cache_replace_line('^.*WPLOCKDOWN', "define( 'WPLOCKDOWN', '$wp_lock_down' );", $wp_cache_config_file);
620	if( $wp_lock_down == '0' && function_exists( 'prune_super_cache' ) )
621	prune_super_cache( $cache_path, true ); // clear the cache after lockdown
622
623	}
624	if( !isset( $wp_lock_down ) ) {
625	if( defined( 'WPLOCKDOWN' ) ) {
626	$wp_lock_down = constant( 'WPLOCKDOWN' );
627	} else {
628	$wp_lock_down = '0';
629	}
630	}
631	?><fieldset class="options">
632	<h3>Lock Down: <?php echo $wp_lock_down == '0' ? '<span style="color:red">Disabled</span>' : '<span style="color:green">Enabled</span>'; ?></h3>
633	<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>
634	<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.
635	<blockquote><code>if( defined( 'WPLOCKDOWN' ) && constant( 'WPLOCKDOWN' ) ) {
636	echo "Sorry. My blog is locked down. Updates will appear shortly";
637	}</code></blockquote>
638	<?php
639	if( $wp_lock_down == '1' ) {
640	?><p>WordPress is locked down. Super Cache static files will not be deleted when new comments are made.</p><?php
641	} else {
642	?><p>WordPress is not locked down. New comments will refresh Super Cache static files as normal.</p><?php
643	}
644	$new_lockdown = $wp_lock_down == '1' ? '0' : '1';
645	$new_lockdown_desc = $wp_lock_down == '1' ? 'Disable' : 'Enable';
646	echo '<form name="wp_lock_down" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
647	echo "<input type='hidden' name='wp_lock_down' value='{$new_lockdown}' />";
648	echo "<div class='submit'><input type='submit' " . SUBMITDISABLED . " value='{$new_lockdown_desc} Lock Down »' /></div>";
649	wp_nonce_field('wp-cache');
650	echo "</form>\n";
651
652	?></fieldset><?php
653	if( $cache_enabled == true && $super_cache_enabled == true ) {
654	?><fieldset class="options">
655	<h3>Directly Cached Files</h3><?php
656
657	$out = '';
658	if( $valid_nonce && is_array( $_POST[ 'direct_pages' ] ) && !empty( $_POST[ 'direct_pages' ] ) ) {
659	$expiredfiles = array_diff( $cached_direct_pages, $_POST[ 'direct_pages' ] );
660	unset( $cached_direct_pages );
661	foreach( $_POST[ 'direct_pages' ] as $page ) {
662	$page = $wpdb->escape( $page );
663	if( $page != '' ) {
664	$cached_direct_pages[] = $page;
665	$out .= "'$page', ";
666	}
667	}
668	if( $out == '' ) {
669	$out = "'', ";
670	}
671	}
672	if( $valid_nonce && $_POST[ 'new_direct_page' ] && '' != $_POST[ 'new_direct_page' ] ) {
673	$page = str_replace( get_option( 'siteurl' ), '', $_POST[ 'new_direct_page' ] );
674	if( substr( $page, 0, 1 ) != '/' )
675	$page = '/' . $page;
676	$page = $wpdb->escape( $page );
677	if( in_array( $page, $cached_direct_pages ) == false ) {
678	$cached_direct_pages[] = $page;
679	$out .= "'$page', ";
680	}
681	}
682
683	if( $out != '' ) {
684	$out = substr( $out, 0, -2 );
685	$out = '$cached_direct_pages = array( ' . $out . ' );';
686	wp_cache_replace_line('^ *\$cached_direct_pages', "$out", $wp_cache_config_file);
687	prune_super_cache( $cache_path, true );
688	}
689
690	if( !empty( $expiredfiles ) ) {
691	foreach( $expiredfiles as $file ) {
692	if( $file != '' ) {
693	$firstfolder = explode( '/', $file );
694	$firstfolder = ABSPATH . $firstfolder[1];
695	$file = ABSPATH . $file;
696	@unlink( trailingslashit( $file ) . 'index.html' );
697	@unlink( trailingslashit( $file ) . 'index.html.gz' );
698	RecursiveFolderDelete( trailingslashit( $firstfolder ) );
699	}
700	}
701	}
702
703	if( $valid_nonce && $_POST[ 'deletepage' ] ) {
704	$page = preg_replace('/[ <>\'\"\r\n\t]/', '', str_replace( '..', '', $_POST['deletepage']) );
705	$pagefile = ABSPATH . $page . 'index.html';
706	$firstfolder = explode( '/', $page );
707	$firstfolder = ABSPATH . $firstfolder[1];
708	$page = ABSPATH . $page;
709	if( is_file( $pagefile ) && is_writeable_ACLSafe( $pagefile ) && is_writeable_ACLSafe( $firstfolder ) ) {
710	@unlink( $pagefile );
711	@unlink( $pagefile . '.gz' );
712	RecursiveFolderDelete( $firstfolder );
713	echo "<strong>$pagefile removed!</strong>";
714	prune_super_cache( $cache_path, true );
715	}
716	}
717
718	$readonly = '';
719	if( !is_writeable_ACLSafe( ABSPATH ) ) {
720	$readonly = 'READONLY';
721	?><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
722	} else {
723	?><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
724	}
725	echo '<form name="direct_page" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
726	if( is_array( $cached_direct_pages ) ) {
727	$out = '';
728	foreach( $cached_direct_pages as $page ) {
729	if( $page == '' )
730	continue;
731	$generated = '';
732	if( is_file( ABSPATH . $page . '/index.html' ) )
733	$generated = '<input type="Submit" name="deletepage" value="' . $page . '">';
734	$out .= "<tr><td><input type='text' $readonly name='direct_pages[]' size='30' value='$page' /></td><td>$generated</td></tr>";
735	}
736	if( $out != '' ) {
737	?><table><tr><th>Existing direct page</th><th>Delete cached file</th></tr><?php
738	echo "$out</table>";
739	}
740	}
741	if( $readonly != 'READONLY' )
742	echo "Add direct page: <input type='text' $readonly name='new_direct_page' size='30' value='' />";
743
744	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>";
745	if( $readonly != 'READONLY' ) {
746	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>";
747	echo "<p>Make the textbox blank to remove it from the list of direct pages and delete the cached file.</p>";
748	}
749
750	wp_nonce_field('wp-cache');
751	if( $readonly != 'READONLY' )
752	echo "<div class='submit'><input type='submit' ' . SUBMITDISABLED . 'value='Update Direct Pages »' /></div>";
753	echo "</form>\n";
754	?></fieldset><?php
755	} // if $super_cache_enabled
756	}
757
758	function RecursiveFolderDelete ( $folderPath ) { // from http://www.php.net/manual/en/function.rmdir.php
759	if( trailingslashit( constant( 'ABSPATH' ) ) == trailingslashit( $folderPath ) )
760	return false;
761	if ( @is_dir ( $folderPath ) ) {
762	$dh = @opendir($folderPath);
763	while (false !== ($value = @readdir($dh))) {
764	if ( $value != "." && $value != ".." ) {
765	$value = $folderPath . "/" . $value;
766	if ( @is_dir ( $value ) ) {
767	RecursiveFolderDelete ( $value );
768	}
769	}
770	}
771	return @rmdir ( $folderPath );
772	} else {
773	return FALSE;
774	}
775	}
776
777	function wp_cache_edit_max_time () {
778	global $cache_max_time, $wp_cache_config_file, $valid_nonce, $cache_enabled, $super_cache_enabled;
779
780	if( !isset( $cache_max_time ) )
781	$cache_max_time = 3600;
782
783	if(isset($_POST['wp_max_time']) && $valid_nonce) {
784	$max_time = (int)$_POST['wp_max_time'];
785	if ($max_time > 0) {
786	$cache_max_time = $max_time;
787	wp_cache_replace_line('^ *\$cache_max_time', "\$cache_max_time = $cache_max_time;", $wp_cache_config_file);
788	}
789	}
790	?><fieldset class="options">
791	<h3>Expiry Time & Garbage Collection</h3><?php
792	echo '<form name="wp_edit_max_time" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
793	echo '<label for="wp_max_time">Expire time:</label> ';
794	echo "<input type=\"text\" size=6 name=\"wp_max_time\" value=\"$cache_max_time\" /> seconds";
795	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>";
796	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>";
797	echo '<div class="submit"><input type="submit" ' . SUBMITDISABLED . 'value="Change Expiration »" /></div>';
798	wp_nonce_field('wp-cache');
799	echo "</form>\n";
800	?></fieldset><?php
801	}
802
803	function wp_cache_sanitize_value($text, & $array) {
804	$text = wp_specialchars(strip_tags($text));
805	$array = preg_split("/[\s,]+/", chop($text));
806	$text = var_export($array, true);
807	$text = preg_replace('/[\s]+/', ' ', $text);
808	return $text;
809	}
810
811	// from tehjosh at gamingg dot net http://uk2.php.net/manual/en/function.apache-request-headers.php#73964
812	// fixed bug in second substr()
813	if( !function_exists('apache_request_headers') ) {
814	function apache_request_headers() {
815	$headers = array();
816	foreach(array_keys($_SERVER) as $skey) {
817	if(substr($skey, 0, 5) == "HTTP_") {
818	$headername = str_replace(" ", "-", ucwords(strtolower(str_replace("_", " ", substr($skey, 5)))));
819	$headers[$headername] = $_SERVER[$skey];
820	}
821	}
822	return $headers;
823	}
824	}
825
826	function wp_cache_edit_rejected_ua() {
827	global $cache_rejected_user_agent, $wp_cache_config_file, $valid_nonce;
828
829	if (!function_exists('apache_request_headers')) return;
830
831	if(isset($_REQUEST['wp_rejected_user_agent']) && $valid_nonce) {
832	$text = wp_cache_sanitize_value($_REQUEST['wp_rejected_user_agent'], $cache_rejected_user_agent);
833	wp_cache_replace_line('^ *\$cache_rejected_user_agent', "\$cache_rejected_user_agent = $text;", $wp_cache_config_file);
834	}
835
836	echo '<a name="user-agents"></a><fieldset class="options"><h3>Rejected User Agents</h3>';
837	echo "<p>Strings in the HTTP 'User Agent' header that prevent WP-Cache from
838	caching bot, spiders, and crawlers' requests.
839	Note that super cached files are still sent to these agents if they already exists.</p>\n";
840	echo '<form name="wp_edit_rejected_user_agent" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
841	echo '<textarea name="wp_rejected_user_agent" cols="40" rows="4" style="width: 50%; font-size: 12px;" class="code">';
842	foreach ($cache_rejected_user_agent as $ua) {
843	echo wp_specialchars($ua) . "\n";
844	}
845	echo '</textarea> ';
846	echo '<div class="submit"><input type="submit" ' . SUBMITDISABLED . 'value="Save UA Strings »" /></div>';
847	wp_nonce_field('wp-cache');
848	echo '</form>';
849	echo "</fieldset>\n";
850	}
851
852	function wp_cache_edit_rejected_pages() {
853	global $wp_cache_config_file, $valid_nonce, $wp_cache_pages;
854
855	if ( isset( $_POST[ 'wp_edit_rejected_pages' ] ) && $valid_nonce ) {
856	$pages = array( 'single', 'pages', 'archives', 'tag', 'frontpage', 'home', 'category' );
857	foreach( $pages as $page ) {
858	if ( isset( $_POST[ 'wp_cache_pages' ][ $page ] ) ) {
859	$value = 1;
860	} else {
861	$value = 0;
862	}
863	wp_cache_replace_line('^ *\$wp_cache_pages\[ "' . $page . '" \]', "\$wp_cache_pages[ \"{$page}\" ] = $value;", $wp_cache_config_file);
864	$wp_cache_pages[ $page ] = $value;
865	}
866	}
867
868	echo '<p>Do not cache the following page types. See the <a href="http://codex.wordpress.org/Conditional_Tags">Conditional Tags</a> documentation for a complete discussion on each type.</p>';
869	echo '<form name="wp_edit_rejected_pages" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
870	echo '<input type="hidden" name="wp_edit_rejected_pages" value="1" />';
871	echo '<label><input type="checkbox" value="1" name="wp_cache_pages[single]" ' . checked( 1, $wp_cache_pages[ 'single' ], false ) . ' /> Single Posts (is_single)</label><br />';
872	echo '<label><input type="checkbox" value="1" name="wp_cache_pages[pages]" ' . checked( 1, $wp_cache_pages[ 'pages' ], false ) . ' /> Pages (is_page)</label><br />';
873	echo '<label><input type="checkbox" value="1" name="wp_cache_pages[frontpage]" ' . checked( 1, $wp_cache_pages[ 'frontpage' ], false ) . ' /> Front Page (is_front_page)</label><br />';
874	echo '  <label><input type="checkbox" value="1" name="wp_cache_pages[home]" ' . checked( 1, $wp_cache_pages[ 'home' ], false ) . ' /> Home (is_home)</label><br />';
875	echo '<label><input type="checkbox" value="1" name="wp_cache_pages[archives]" ' . checked( 1, $wp_cache_pages[ 'archives' ], false ) . ' /> Archives (is_archive)</label><br />';
876	echo '  <label><input type="checkbox" value="1" name="wp_cache_pages[tag]" ' . checked( 1, $wp_cache_pages[ 'tag' ], false ) . ' /> Tags (is_tag)</label><br />';
877	echo '  <label><input type="checkbox" value="1" name="wp_cache_pages[category]" ' . checked( 1, $wp_cache_pages[ 'category' ], false ) . ' /> Category (is_category)</label><br />';
878
879	echo '<div class="submit"><input type="submit" ' . SUBMITDISABLED . 'value="Save »" /></div>';
880	wp_nonce_field('wp-cache');
881	echo "</form>\n";
882
883	}
884
885	function wp_cache_edit_rejected() {
886	global $cache_acceptable_files, $cache_rejected_uri, $wp_cache_config_file, $valid_nonce;
887
888	if(isset($_REQUEST['wp_rejected_uri']) && $valid_nonce) {
889	$text = wp_cache_sanitize_value( str_replace( '\\\\', '\\', $_REQUEST['wp_rejected_uri'] ), $cache_rejected_uri );
890	wp_cache_replace_line('^ *\$cache_rejected_uri', "\$cache_rejected_uri = $text;", $wp_cache_config_file);
891	}
892
893
894	echo '<form name="wp_edit_rejected" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
895	echo "<p>Add here strings (not a filename) that forces a page not to be cached. For example, if your URLs include year and you dont want to cache last year posts, it's enough to specify the year, i.e. '/2004/'. WP-Cache will search if that string is part of the URI and if so, it will not cache that page.</p>\n";
896	echo '<textarea name="wp_rejected_uri" cols="40" rows="4" style="width: 50%; font-size: 12px;" class="code">';
897	foreach ($cache_rejected_uri as $file) {
898	echo wp_specialchars( $file ) . "\n";
899	}
900	echo '</textarea> ';
901	echo '<div class="submit"><input type="submit" ' . SUBMITDISABLED . 'value="Save Strings »" /></div>';
902	wp_nonce_field('wp-cache');
903	echo "</form>\n";
904	}
905
906	function wp_cache_edit_accepted() {
907	global $cache_acceptable_files, $cache_rejected_uri, $wp_cache_config_file, $valid_nonce;
908
909	if(isset($_REQUEST['wp_accepted_files']) && $valid_nonce) {
910	$text = wp_cache_sanitize_value($_REQUEST['wp_accepted_files'], $cache_acceptable_files);
911	wp_cache_replace_line('^ *\$cache_acceptable_files', "\$cache_acceptable_files = $text;", $wp_cache_config_file);
912	}
913
914
915	echo '<div style="clear:both"></div><form name="wp_edit_accepted" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
916	echo "<p>Add here those filenames that can be cached, even if they match one of the rejected substring specified above.</p>\n";
917	echo '<textarea name="wp_accepted_files" cols="40" rows="8" style="width: 50%; font-size: 12px;" class="code">';
918	foreach ($cache_acceptable_files as $file) {
919	echo wp_specialchars($file) . "\n";
920	}
921	echo '</textarea> ';
922	echo '<div class="submit"><input type="submit" ' . SUBMITDISABLED . 'value="Save Files »" /></div>';
923	wp_nonce_field('wp-cache');
924	echo "</form>\n";
925	}
926
927	function wp_cache_enable() {
928	global $wp_cache_config_file, $cache_enabled, $supercachedir;
929
930	if(get_option('gzipcompression')) {
931	echo "<strong>Error: GZIP compression is enabled, disable it if you want to enable wp-cache.</strong>";
932	return false;
933	}
934	if( wp_cache_replace_line('^ *\$cache_enabled', '$cache_enabled = true;', $wp_cache_config_file) ) {
935	$cache_enabled = true;
936	}
937	wp_super_cache_enable();
938	}
939
940	function wp_cache_disable() {
941	global $wp_cache_config_file, $cache_enabled;
942
943	if (wp_cache_replace_line('^ *\$cache_enabled', '$cache_enabled = false;', $wp_cache_config_file)) {
944	$cache_enabled = false;
945	}
946	wp_super_cache_disable();
947	}
948	function wp_super_cache_enable() {
949	global $supercachedir, $wp_cache_config_file, $super_cache_enabled;
950
951	if( is_dir( $supercachedir . ".disabled" ) )
952	if( is_dir( $supercachedir ) ) {
953	prune_super_cache( $supercachedir . ".disabled", true );
954	@unlink( $supercachedir . ".disabled" );
955	} else {
956	@rename( $supercachedir . ".disabled", $supercachedir );
957	}
958	wp_cache_replace_line('^ *\$super_cache_enabled', '$super_cache_enabled = true;', $wp_cache_config_file);
959	$super_cache_enabled = true;
960	}
961
962	function wp_super_cache_disable() {
963	global $cache_path, $supercachedir, $wp_cache_config_file, $super_cache_enabled;
964
965	wp_cache_replace_line('^ *\$super_cache_enabled', '$super_cache_enabled = false;', $wp_cache_config_file);
966	if( is_dir( $supercachedir ) )
967	@rename( $supercachedir, $supercachedir . ".disabled" );
968	$super_cache_enabled = false;
969	sleep( 1 ); // allow existing processes to write to the supercachedir and then delete it
970	if (function_exists ('prune_super_cache') && is_dir( $supercachedir ) ) {
971	prune_super_cache( $cache_path, true );
972	}
973	}
974
975	function wp_cache_is_enabled() {
976	global $wp_cache_config_file;
977
978	if(get_option('gzipcompression')) {
979	echo "<strong>Warning</strong>: GZIP compression is enabled in Wordpress, wp-cache will be bypassed until you disable gzip compression.";
980	return false;
981	}
982	$lines = file($wp_cache_config_file);
983	foreach($lines as $line) {
984	if (preg_match('/^ \$cache_enabled = true ;/', $line))
985	return true;
986	}
987	return false;
988	}
989
990
991	function wp_cache_replace_line($old, $new, $my_file) {
992	if (!is_writeable_ACLSafe($my_file)) {
993	echo "Error: file $my_file is not writable.\n";
994	return false;
995	}
996	$found = false;
997	$lines = file($my_file);
998	foreach($lines as $line) {
999	if ( preg_match("/$old/", $line)) {
1000	$found = true;
1001	break;
1002	}
1003	}
1004	if ($found) {
1005	$fd = fopen($my_file, 'w');
1006	foreach($lines as $line) {
1007	if ( !preg_match("/$old/", $line))
1008	fputs($fd, $line);
1009	else {
1010	fputs($fd, "$new //Added by WP-Cache Manager\n");
1011	}
1012	}
1013	fclose($fd);
1014	return true;
1015	}
1016	$fd = fopen($my_file, 'w');
1017	$done = false;
1018	foreach($lines as $line) {
1019	if ( $done \|\| !preg_match('/^(if\ \(\ \!\ )?define\|\$\|\?>/', $line) ) {
1020	fputs($fd, $line);
1021	} else {
1022	fputs($fd, "$new //Added by WP-Cache Manager\n");
1023	fputs($fd, $line);
1024	$done = true;
1025	}
1026	}
1027	fclose($fd);
1028	return true;
1029	}
1030
1031	function wp_cache_verify_cache_dir() {
1032	global $cache_path, $blog_cache_dir, $blogcacheid;
1033
1034	$dir = dirname($cache_path);
1035	if ( !file_exists($cache_path) ) {
1036	if ( !is_writeable_ACLSafe( $dir ) \|\| !($dir = mkdir( $cache_path ) ) ) {
1037	echo "<strong>Error:</strong> Your cache directory (<strong>$cache_path</strong>) did not exist and couldn't be created by the web server. Check $dir permissions.";
1038	return false;
1039	}
1040	}
1041	if ( !is_writeable_ACLSafe($cache_path)) {
1042	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.";
1043	return false;
1044	}
1045
1046	if ( '/' != substr($cache_path, -1)) {
1047	$cache_path .= '/';
1048	}
1049
1050	if( false == is_dir( $blog_cache_dir ) ) {
1051	@mkdir( $cache_path . "blogs" );
1052	if( $blog_cache_dir != $cache_path . "blogs/" )
1053	@mkdir( $blog_cache_dir );
1054	}
1055
1056	if( false == is_dir( $blog_cache_dir . 'meta' ) )
1057	@mkdir( $blog_cache_dir . 'meta' );
1058
1059	return true;
1060	}
1061
1062	function wp_cache_verify_config_file() {
1063	global $wp_cache_config_file, $wp_cache_config_file_sample, $sem_id, $cache_path;
1064
1065	$new = false;
1066	$dir = dirname($wp_cache_config_file);
1067
1068	if ( file_exists($wp_cache_config_file) ) {
1069	$lines = join( ' ', file( $wp_cache_config_file ) );
1070	if( strpos( $lines, 'WPCACHEHOME' ) === false ) {
1071	if( is_writeable_ACLSafe( $wp_cache_config_file ) ) {
1072	@unlink( $wp_cache_config_file );
1073	} else {
1074	echo "<strong>Error:</strong> Your WP-Cache config file (<strong>$wp_cache_config_file</strong>) is out of date and not writable by the Web server.Please delete it and refresh this page.";
1075	return false;
1076	}
1077	}
1078	} elseif( !is_writeable_ACLSafe($dir)) {
1079	echo "<strong>Error:</strong> Configuration file missing and " . WP_CONTENT_DIR . " directory (<strong>$dir</strong>) is not writable by the Web server.Check its permissions.";
1080	return false;
1081	}
1082
1083	if ( !file_exists($wp_cache_config_file) ) {
1084	if ( !file_exists($wp_cache_config_file_sample) ) {
1085	echo "<strong>Error:</strong> Sample WP-Cache config file (<strong>$wp_cache_config_file_sample</strong>) does not exist.Verify you installation.";
1086	return false;
1087	}
1088	copy($wp_cache_config_file_sample, $wp_cache_config_file);
1089	$dir = str_replace( str_replace( '\\', '/', WP_CONTENT_DIR ), '', str_replace( '\\', '/', dirname(__FILE__) ) );
1090	if( is_file( dirname(__FILE__) . '/wp-cache-config-sample.php' ) ) {
1091	wp_cache_replace_line('define\(\ \'WPCACHEHOME', "\tdefine( 'WPCACHEHOME', WP_CONTENT_DIR . \"{$dir}/\" );", $wp_cache_config_file);
1092	} elseif( is_file( dirname(__FILE__) . '/wp-super-cache/wp-cache-config-sample.php' ) ) {
1093	wp_cache_replace_line('define\(\ \'WPCACHEHOME', "\tdefine( 'WPCACHEHOME', WP_CONTENT_DIR . \"{$dir}/wp-super-cache/\" );", $wp_cache_config_file);
1094	}
1095	$new = true;
1096	}
1097	if( $sem_id == 5419 && $cache_path != '' ) {
1098	$sem_id = crc32( $_SERVER[ 'HTTP_HOST' ] . $cache_path ) & 0x7fffffff;
1099	wp_cache_replace_line('sem_id', '$sem_id = ' . $sem_id . ';', $wp_cache_config_file);
1100	}
1101	require($wp_cache_config_file);
1102	return true;
1103	}
1104
1105	function wp_cache_create_advanced_cache() {
1106	global $wp_cache_link, $wp_cache_file;
1107	$ret = true;
1108
1109	$file = file_get_contents( $wp_cache_file );
1110	$file = str_replace( 'CACHEHOME', constant( 'WPCACHEHOME' ), $file );
1111	$fp = @fopen( $wp_cache_link, 'w' );
1112	if( $fp ) {
1113	fputs( $fp, $file );
1114	fclose( $fp );
1115	} else {
1116	$ret = false;
1117	}
1118	return $ret;
1119	}
1120
1121	function wp_cache_check_link() {
1122	global $wp_cache_link, $wp_cache_file;
1123
1124	$ret = true;
1125	if( file_exists($wp_cache_link) ) {
1126	$file = file_get_contents( $wp_cache_link );
1127	if( strpos( $file, "WP SUPER CACHE 0.8.9.1" ) ) {
1128	return true;
1129	} else {
1130	if( !@unlink($wp_cache_link) ) {
1131	$ret = false;
1132	} else {
1133	$ret = wp_cache_create_advanced_cache();
1134	}
1135	}
1136	} else {
1137	$ret = wp_cache_create_advanced_cache();
1138	}
1139
1140	if( false == $ret ) {
1141	echo "<h3>Warning! <em>" . constant( 'WP_CONTENT_DIR' ) . "/advanced-cache.php</em> does not exist or cannot be updated.</h3>";
1142	echo "<p><ul><li>1. If it already exists please delete the file first.</li>";
1143	echo "<li>2. Make " . constant( 'WP_CONTENT_DIR' ) . " writable using the chmod command through your ftp or server software. (<em>chmod 777 " . constant( 'WP_CONTENT_DIR' ) . "</em>) and refresh this page. This is only a temporary measure and you'll have to make it read only afterwards again. (Change 777 to 755 in the previous command)</li>";
1144	echo "<li>3. Refresh this page to update <em>" . constant( 'WP_CONTENT_DIR' ) . "/advanced-cache.php</em></li></ul>";
1145	echo "If that doesn't work, make sure the file <em>" . constant( 'WP_CONTENT_DIR' ) . "/advanced-cache.php</em> doesn't exist:<ol>";
1146	echo "<li>1. Open <em>$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>";
1147	return false;
1148	}
1149	return true;
1150	}
1151
1152	function wp_cache_check_global_config() {
1153	if( defined( 'WP_CACHE' ) )
1154	return true;
1155
1156	if ( file_exists( ABSPATH . 'wp-config.php') ) {
1157	$global = ABSPATH . 'wp-config.php';
1158	} else {
1159	$global = dirname(ABSPATH) . '/wp-config.php';
1160	}
1161
1162	$howtoenable = "Edit <code>$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. ";
1163	$lines = file($global);
1164	foreach($lines as $line) {
1165	if (preg_match('/^\sdefine\s$\s\'WP_CACHE\'\s,\s(?i:TRUE\|1)\s$\s*;/', $line)) {
1166	echo $howtoenable;
1167	return false;
1168	}
1169	}
1170	$line = 'define(\'WP_CACHE\', true);';
1171	if (!is_writeable_ACLSafe($global) \|\| !wp_cache_replace_line('define \( \'WP_CACHE\'', $line, $global) ) {
1172	echo "<strong>Error: WP_CACHE is not enabled</strong> in your <code>wp-config.php</code> file and I couldn't modify it.";
1173	echo $howtoenable;
1174	return false;
1175	}
1176	return true;
1177	}
1178
1179	function wp_cache_files() {
1180	global $cache_path, $file_prefix, $cache_max_time, $valid_nonce, $supercachedir, $cache_enabled, $super_cache_enabled, $blog_cache_dir;
1181
1182	if ( '/' != substr($cache_path, -1)) {
1183	$cache_path .= '/';
1184	}
1185
1186	if ( $valid_nonce ) {
1187	if(isset($_REQUEST['wp_delete_cache'])) {
1188	wp_cache_clean_cache($file_prefix);
1189	}
1190	if(isset($_REQUEST['wp_delete_cache_file'])) {
1191	wp_cache_clean_cache($_REQUEST['wp_delete_cache_file']);
1192	}
1193	if(isset($_REQUEST['wp_delete_expired'])) {
1194	wp_cache_clean_expired($file_prefix);
1195	}
1196	}
1197	if(isset($_REQUEST['wp_list_cache'])) {
1198	$list_files = true;
1199	$list_mess = "Update list";
1200	} else
1201	$list_mess = "List files";
1202
1203	echo '<fieldset class="options" id="show-this-fieldset"><h3>Cache Contents</h3>';
1204	/*
1205	echo '<form name="wp_cache_content_list" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
1206	echo '<input type="hidden" name="wp_list_cache" />';
1207	echo '<div class="submit"><input type="submit" ' . SUBMITDISABLED . 'value="'.$list_mess.' »" /></div>';
1208	echo "</form>\n";
1209	*/
1210
1211	$list_files = false; // it doesn't list supercached files, and removing single pages is buggy
1212	$count = 0;
1213	$expired = 0;
1214	$now = time();
1215	if ( ($handle = @opendir( $blog_cache_dir . 'meta/' )) ) {
1216	if ($list_files) echo "<table cellspacing=\"0\" cellpadding=\"5\">";
1217	$wp_cache_fsize = 0;
1218	while ( false !== ($file = readdir($handle))) {
1219	if ( preg_match("/^$file_prefix.*\.meta/", $file) ) {
1220	$this_expired = false;
1221	$content_file = preg_replace("/meta$/", "html", $file);
1222	$mtime = filemtime( $blog_cache_dir . 'meta/' . $file );
1223	if ( ! ( $fsize = @filesize( $blog_cache_dir . $content_file ) ) )
1224	continue; // .meta does not exists
1225	$wp_cache_fsize += $fsize;
1226	$fsize = intval($fsize/1024);
1227	$age = $now - $mtime;
1228	if ( $age > $cache_max_time ) {
1229	$expired++;
1230	$this_expired = true;
1231	}
1232	$count++;
1233	/*
1234	if ($list_files) {
1235	$meta = new CacheMeta;
1236	$meta = unserialize(file_get_contents($cache_path . 'meta/' . $file));
1237	echo $flip ? '<tr style="background: #EAEAEA;">' : '<tr>';
1238	$flip = !$flip;
1239	echo '<td><a href="http://' . $meta->uri . '" target="_blank" >';
1240	echo $meta->uri . "</a></td>";
1241	if ($this_expired) echo "<td><span style='color:red'>$age secs</span></td>";
1242	else echo "<td>$age secs</td>";
1243	echo "<td>$fsize KB</td>";
1244	echo '<td><form name="wp_delete_cache_file" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
1245	echo '<input type="hidden" name="wp_list_cache" />';
1246	echo '<input type="hidden" name="wp_delete_cache_file" value="'.preg_replace("/^(.*)\.meta$/", "$1", $file).'" />';
1247	echo '<div class="submit"><input id="deletepost" ' . SUBMITDISABLED . 'type="submit" value="Remove" /></div>';
1248	wp_nonce_field('wp-cache');
1249	echo "</form></td></tr>\n";
1250	}
1251	*/
1252	}
1253	}
1254	closedir($handle);
1255	if ($list_files) echo "</table>";
1256	}
1257	if( $wp_cache_fsize != 0 ) {
1258	$wp_cache_fsize = $wp_cache_fsize/1024;
1259	} else {
1260	$wp_cache_fsize = 0;
1261	}
1262	if( $wp_cache_fsize > 1024 ) {
1263	$wp_cache_fsize = number_format( $wp_cache_fsize / 1024, 2 ) . "MB";
1264	} elseif( $wp_cache_fsize != 0 ) {
1265	$wp_cache_fsize = number_format( $wp_cache_fsize, 2 ) . "KB";
1266	} else {
1267	$wp_cache_fsize = '0KB';
1268	}
1269	if( $cache_enabled == true && $super_cache_enabled == true ) {
1270	$now = time();
1271	$sizes = array( 'expired' => 0, 'cached' => 0, 'ts' => 0 );
1272
1273	if (is_dir($supercachedir)) {
1274	if( $dh = opendir( $supercachedir ) ) {
1275	while( ( $entry = readdir( $dh ) ) !== false ) {
1276	if ($entry != '.' && $entry != '..') {
1277	$sizes = wpsc_dirsize( trailingslashit( $supercachedir ) . $entry, $sizes );
1278	}
1279	}
1280	closedir($dh);
1281	}
1282	} else {
1283	if(is_file($supercachedir) && filemtime( $supercachedir ) + $cache_max_time <= $now )
1284	$sizes[ 'expired' ] ++;
1285	}
1286	$sizes[ 'ts' ] = time();
1287	}
1288
1289	echo "<p><strong>WP-Cache ({$wp_cache_fsize})</strong></p>";
1290	echo "<ul><li>$count Cached Pages</li>";
1291	echo "<li>$expired Expired Pages</li></ul>";
1292	if( $cache_enabled == true && $super_cache_enabled == true ) {
1293	$fsize = $sizes[ 'fsize' ] / 1024;
1294	if( $fsize > 1024 ) {
1295	$fsize = number_format( $fsize / 1024, 2 ) . "MB";
1296	} elseif( $fsize != 0 ) {
1297	$fsize = number_format( $fsize, 2 ) . "KB";
1298	} else {
1299	$fsize = "0KB";
1300	}
1301	echo "<p><strong>WP-Super-Cache ({$fsize})</strong></p>";
1302	echo "<ul><li>" . intval($sizes['cached']/2) . " Cached Pages</li>";
1303	$age = intval(($now - $sizes['ts'])/60);
1304	echo "<li>" . intval($sizes['expired']/2) . " Expired Pages</li></ul>";
1305	}
1306	$last_gc = get_option( "wpsupercache_gc_time" );
1307	if( $last_gc ) {
1308	$next_gc = $cache_max_time < 1800 ? $cache_max_time : 600;
1309	$next_gc_mins = ( time() - $last_gc );
1310	echo "<p><strong>Garbage Collection</strong><br />Last GC was <strong>" . date( 'i:s', $next_gc_mins ) . "</strong> minutes ago<br />";
1311	echo "Next GC in <strong>" . date( 'i:s', $next_gc - $next_gc_mins ) . "</strong> minutes</p>";
1312	}
1313
1314	echo "<p>Expired files are files older than $cache_max_time seconds. They are still used by the plugin and are deleted periodically.</p>";
1315	echo '<form name="wp_cache_content_expired" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
1316	echo '<input type="hidden" name="wp_delete_expired" />';
1317	echo '<div class="submit" style="float:left"><input type="submit" ' . SUBMITDISABLED . 'value="Delete Expired »" /></div>';
1318	wp_nonce_field('wp-cache');
1319	echo "</form>\n";
1320
1321	echo '<form name="wp_cache_content_delete" action="'. $_SERVER["REQUEST_URI"] . '" method="post">';
1322	echo '<input type="hidden" name="wp_delete_cache" />';
1323	echo '<div class="submit" style="float:left;margin-left:10px"><input id="deletepost" type="submit" ' . SUBMITDISABLED . 'value="Delete Cache »" /></div>';
1324	wp_nonce_field('wp-cache');
1325	echo "</form>\n";
1326
1327	echo '</fieldset>';
1328	}
1329
1330	function delete_cache_dashboard() {
1331	if( function_exists( 'is_site_admin' ) && !is_site_admin() )
1332	return false;
1333
1334	if( function_exists('current_user_can') && !current_user_can('manage_options') )
1335	return false;
1336
1337	echo "<li><a href='" . wp_nonce_url( 'options-general.php?page=wpsupercache&wp_delete_cache=1', 'wp-cache' ) . "' target='_blank' title='Delete Super Cache cached files (opens in new window)'>Delete Cache</a></li>";
1338	}
1339	add_action( 'dashmenu', 'delete_cache_dashboard' );
1340
1341	function wpsc_dirsize($directory, $sizes) {
1342	global $cache_max_time;
1343	$now = time();
1344
1345	if (is_dir($directory)) {
1346	if( $dh = opendir( $directory ) ) {
1347	while( ( $entry = readdir( $dh ) ) !== false ) {
1348	if ($entry != '.' && $entry != '..') {
1349	$sizes = wpsc_dirsize( trailingslashit( $directory ) . $entry, $sizes );
1350	}
1351	}
1352	closedir($dh);
1353	}
1354	} else {
1355	if(is_file($directory) ) {
1356	if( filemtime( $directory ) + $cache_max_time <= $now ) {
1357	$sizes[ 'expired' ]+=1;
1358	} else {
1359	$sizes[ 'cached' ]+=1;
1360	}
1361	if ( ! isset( $sizes[ 'fsize' ] ) )
1362	$sizes[ 'fsize' ] = @filesize( $directory );
1363	else
1364	$sizes[ 'fsize' ] += @filesize( $directory );
1365	}
1366	}
1367	return $sizes;
1368	}
1369
1370
1371	function wp_cache_clean_cache($file_prefix) {
1372	global $cache_path, $supercachedir, $blog_cache_dir;
1373
1374	// If phase2 was compiled, use its function to avoid race-conditions
1375	if(function_exists('wp_cache_phase2_clean_cache')) {
1376	if (function_exists ('prune_super_cache')) {
1377	if( is_dir( $supercachedir ) ) {
1378	prune_super_cache( $supercachedir, true );
1379	} elseif( is_dir( $supercachedir . '.disabled' ) ) {
1380	prune_super_cache( $supercachedir . '.disabled', true );
1381	}
1382	prune_super_cache( $cache_path, true );
1383	$_POST[ 'super_cache_stats' ] = 1; // regenerate super cache stats;
1384	}
1385	return wp_cache_phase2_clean_cache($file_prefix);
1386	}
1387
1388	$expr = "/^$file_prefix/";
1389	if ( ($handle = @opendir( $blog_cache_dir )) ) {
1390	while ( false !== ($file = readdir($handle))) {
1391	if ( preg_match($expr, $file) ) {
1392	@unlink( $blog_cache_dir . $file);
1393	@unlink( $blog_cache_dir . 'meta/' . str_replace( '.html', '.meta', $file ) );
1394	}
1395	}
1396	closedir($handle);
1397	}
1398	}
1399
1400	function wp_cache_clean_expired($file_prefix) {
1401	global $cache_path, $cache_max_time, $blog_cache_dir;
1402
1403	// If phase2 was compiled, use its function to avoid race-conditions
1404	if(function_exists('wp_cache_phase2_clean_expired')) {
1405	if (function_exists ('prune_super_cache')) {
1406	$dir = $cache_path . 'supercache/' . preg_replace('/:.*$/', '', $_SERVER["HTTP_HOST"]);
1407	if( is_dir( $dir ) ) {
1408	prune_super_cache( $dir );
1409	} elseif( is_dir( $dir . '.disabled' ) ) {
1410	prune_super_cache( $dir . '.disabled' );
1411	}
1412	$_POST[ 'super_cache_stats' ] = 1; // regenerate super cache stats;
1413	}
1414	return wp_cache_phase2_clean_expired($file_prefix);
1415	}
1416
1417	$expr = "/^$file_prefix/";
1418	$now = time();
1419	if ( ($handle = @opendir( $blog_cache_dir )) ) {
1420	while ( false !== ($file = readdir($handle))) {
1421	if ( preg_match( $expr, $file ) &&
1422	( filemtime( $blog_cache_dir . $file ) + $cache_max_time ) <= $now ) {
1423	@unlink( $blog_cache_dir . $file );
1424	@unlink( $blog_cache_dir . 'meta/' . str_replace( '.html', '.meta', $file ) );
1425	}
1426	}
1427	closedir($handle);
1428	}
1429	}
1430
1431	function wpsc_remove_marker( $filename, $marker ) {
1432	if (!file_exists( $filename ) \|\| is_writeable_ACLSafe( $filename ) ) {
1433	if (!file_exists( $filename ) ) {
1434	return '';
1435	} else {
1436	$markerdata = explode( "\n", implode( '', file( $filename ) ) );
1437	}
1438
1439	$f = fopen( $filename, 'w' );
1440	$foundit = false;
1441	if ( $markerdata ) {
1442	$state = true;
1443	foreach ( $markerdata as $n => $markerline ) {
1444	if (strpos($markerline, '# BEGIN ' . $marker) !== false)
1445	$state = false;
1446	if ( $state ) {
1447	if ( $n + 1 < count( $markerdata ) )
1448	fwrite( $f, "{$markerline}\n" );
1449	else
1450	fwrite( $f, "{$markerline}" );
1451	}
1452	if (strpos($markerline, '# END ' . $marker) !== false) {
1453	$state = true;
1454	}
1455	}
1456	}
1457	return true;
1458	} else {
1459	return false;
1460	}
1461	}
1462
1463	function wp_super_cache_footer() {
1464	?><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
1465	}
1466	if( isset( $wp_cache_hello_world ) && $wp_cache_hello_world )
1467	add_action( 'wp_footer', 'wp_super_cache_footer' );
1468
1469	if( get_option( 'gzipcompression' ) )
1470	update_option( 'gzipcompression', 0 );
1471
1472	// Catch 404 requests. Themes that use query_posts() destroy $wp_query->is_404
1473	function wp_cache_catch_404() {
1474	global $wp_cache_404;
1475	$wp_cache_404 = false;
1476	if( is_404() )
1477	$wp_cache_404 = true;
1478	}
1479	add_action( 'template_redirect', 'wp_cache_catch_404' );
1480
1481	function wp_cache_favorite_action( $actions ) {
1482	if( function_exists( 'is_site_admin' ) && !is_site_admin() )
1483	return $actions;
1484
1485	if( function_exists('current_user_can') && !current_user_can('manage_options') )
1486	return $actions;
1487
1488	$actions[ wp_nonce_url( 'options-general.php?page=wpsupercache&wp_delete_cache=1', 'wp-cache' ) ] = array( __( 'Delete Cache' ), 'manage_options' );
1489
1490	return $actions;
1491	}
1492	add_filter( 'favorite_actions', 'wp_cache_favorite_action' );
1493
1494	function wp_cache_plugin_notice( $plugin ) {
1495	global $cache_enabled;
1496	if( $plugin == 'wp-super-cache/wp-cache.php' && !$cache_enabled && function_exists( "admin_url" ) )
1497	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>';
1498	}
1499	add_action( 'after_plugin_row', 'wp_cache_plugin_notice' );
1500
1501	function wp_cache_plugin_actions( $links, $file ) {
1502	if( $file == 'wp-super-cache/wp-cache.php' && function_exists( "admin_url" ) ) {
1503	$settings_link = '<a href="' . admin_url( 'options-general.php?page=wpsupercache' ) . '">' . __('Settings') . '</a>';
1504	array_unshift( $links, $settings_link ); // before other links
1505	}
1506	return $links;
1507	}
1508	add_filter( 'plugin_action_links', 'wp_cache_plugin_actions', 10, 2 );
1509
1510	function wp_cache_admin_notice() {
1511	global $cache_enabled;
1512	if( substr( $_SERVER["PHP_SELF"], -11 ) == 'plugins.php' && !$cache_enabled && function_exists( "admin_url" ) )
1513	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>';
1514	}
1515	add_action( 'admin_notices', 'wp_cache_admin_notice' );
1516	?>
1517