enable the cache. Based on WP-Cache by Ricardo Galli Granada .
Version: 0.6.4
Author: Donncha O Caoimh
Author URI: http://ocaoimh.ie/
*/
/* Copyright 2005-2006 Ricardo Galli Granada (email : gallir@uib.es)
Some code copyright 2007-2008 Donncha O Caoimh (http://ocaoimh.ie/)
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
$wp_cache_config_file = ABSPATH . 'wp-content/wp-cache-config.php';
if( !@include($wp_cache_config_file) ) {
get_wpcachehome();
$wp_cache_config_file_sample = WPCACHEHOME . 'wp-cache-config-sample.php';
@include($wp_cache_config_file_sample);
} else {
get_wpcachehome();
}
$wp_cache_config_file_sample = WPCACHEHOME . 'wp-cache-config-sample.php';
$wp_cache_link = ABSPATH . 'wp-content/advanced-cache.php';
$wp_cache_file = WPCACHEHOME . 'wp-cache-phase1.php';
include(WPCACHEHOME . 'wp-cache-base.php');
function get_wpcachehome() {
if( defined( 'WPCACHEHOME' ) == false ) {
if( is_file( dirname(__FILE__) . '/wp-cache-config-sample.php' ) ) {
define( 'WPCACHEHOME', trailingslashit( dirname(__FILE__) ) );
} elseif( is_file( dirname(__FILE__) . '/wp-super-cache/wp-cache-config-sample.php' ) ) {
define( 'WPCACHEHOME', dirname(__FILE__) . '/wp-super-cache/' );
} else {
die( 'Please create wp-content/wp-cache-config.php from wp-super-cache/wp-cache-config-sample.php' );
}
}
}
function wp_cache_add_pages() {
if( function_exists( 'is_site_admin' ) ) {
if( is_site_admin() ) {
add_submenu_page('wpmu-admin.php', __('WP Super Cache'), __('WP Super Cache'), 'manage_options', __FILE__, 'wp_cache_manager');
add_options_page('WP Super Cache', 'WP Super Cache', 'manage_options', __FILE__, 'wp_cache_manager');
}
} else {
add_options_page('WP Super Cache', 'WP Super Cache', 'manage_options', __FILE__, 'wp_cache_manager');
}
}
add_action('admin_menu', 'wp_cache_add_pages');
function wp_cache_manager() {
global $wp_cache_config_file, $valid_nonce, $supercachedir, $cache_path, $cache_enabled, $cache_compression, $super_cache_enabled, $wp_cache_hello_world;
if( function_exists( 'is_site_admin' ) )
if( !is_site_admin() )
return;
$supercachedir = $cache_path . 'supercache/' . preg_replace('/:.*$/', '', $_SERVER["HTTP_HOST"]);
if( get_option( 'gzipcompression' ) == 1 )
update_option( 'gzipcompression', 0 );
$valid_nonce = wp_verify_nonce($_REQUEST['_wpnonce'], 'wp-cache');
/* http://www.netlobo.com/div_hiding.html */
?>
';
echo "WP Super Cache Manager \n";
if( ini_get( 'safe_mode' ) ) {
?>Warning! PHP safe mode enabled!
You may experience problems running this plugin because SAFE MODE is enabled. Your server is set up to check the owner of PHP scripts before allowing them to read and write files.
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 wp-content/cache/ directory must also be changed. See the safe mode manual page for further details.
You or an administrator must disable this. See the safe mode manual page for further details. This cannot be disabled in a .htaccess file unfortunately. It must be done in the php.ini config file.Configuration file changed, some values might be wrong. Load the page again from the "Options" menu to reset them.';
}
if ( !wp_cache_check_link() ||
!wp_cache_verify_config_file() ||
!wp_cache_verify_cache_dir() ) {
echo "Mod rewrite may not be installed!
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.
Read Only Mode. Configuration cannot be changed. Why
The WP Super Cache configuration file is wp-content/wp-cache-config.php and cannot be modified. The wp-content directory and wp-cache-config.php file must be writeable by the webserver to make any changes.chmod 777 wp-content; chmod 666 wp-content/wp-cache-config.phpchmod 755 wp-content; chmod 644 wp-content/wp-cache-config.php
WP Super Cache Status ';
?>
ON (WP Cache and Super Cache enabled)OFF (WP Cache and Super Cache disabled)HALF ON (Super Cache Disabled)
Super Cache Compression
\n";
?>
Mod Rewrite Rules Mod Rewrite rules cannot be updated!";
echo "You must have BEGIN and END markers in {$home_path}.htaccess for the auto update to work. They look like this and surround the main WordPress mod_rewrite rules:
# BEGIN WordPress # END WordPress Thank you for upgrading. 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:
RewriteCond %{HTTP_COOKIE} !^.*wordpressuser.*\$RewriteCond %{HTTP_COOKIE} !^.*wordpress.*\$ ";
echo "\n";
return;
} elseif( strpos( $scrules, 'supercache' ) || strpos( $wprules, 'supercache' ) ) { // only write the rules once
$dohtaccess = false;
}
$rules = "\n";
$rules .= "RewriteEngine On\n";
$rules .= "RewriteBase $home_root\n"; // props Chris Messina
$charset = get_option('blog_charset') == '' ? 'UTF-8' : get_option('blog_charset');
$rules .= "AddDefaultCharset {$charset}\n";
$rules .= "RewriteCond %{REQUEST_METHOD} !=POST\n";
$rules .= "RewriteCond %{QUERY_STRING} !.*s=.*\n";
$rules .= "RewriteCond %{QUERY_STRING} !.*attachment_id=.*\n";
$rules .= "RewriteCond %{HTTP_COOKIE} !^.*(comment_author_|wordpress|wp-postpass_).*$\n";
$rules .= "RewriteCond %{HTTP:Accept-Encoding} gzip\n";
$rules .= "RewriteCond %{DOCUMENT_ROOT}{$home_root}wp-content/cache/supercache/%{HTTP_HOST}{$home_root}$1/index.html.gz -f\n";
$rules .= "RewriteRule ^(.*) {$home_root}wp-content/cache/supercache/%{HTTP_HOST}{$home_root}$1/index.html.gz [L]\n\n";
$rules .= "RewriteCond %{REQUEST_METHOD} !=POST\n";
$rules .= "RewriteCond %{QUERY_STRING} !.*s=.*\n";
$rules .= "RewriteCond %{QUERY_STRING} !.*attachment_id=.*\n";
$rules .= "RewriteCond %{HTTP_COOKIE} !^.*(comment_author_|wordpress|wp-postpass_).*$\n";
$rules .= "RewriteCond %{DOCUMENT_ROOT}{$home_root}wp-content/cache/supercache/%{HTTP_HOST}{$home_root}$1/index.html -f\n";
$rules .= "RewriteRule ^(.*) {$home_root}wp-content/cache/supercache/%{HTTP_HOST}{$home_root}$1/index.html [L]\n";
$rules .= " \n";
if( $dohtaccess && !$_POST[ 'updatehtaccess' ] ) {
echo "In order to serve static html files your server must have the correct mod_rewrite rules added to a file called " . ABSPATH . ".htaccess'Update mod_rewrite rules »' button or you can edit the file yourself and add the following rules. Make sure they appear before any existing WordPress rules.";
echo "
" . wp_specialchars( $rules ) . " ";
echo '\n";
} elseif( $dohtaccess && $valid_nonce && $_POST[ 'updatehtaccess' ] ) {
wpsc_remove_marker( $home_path.'.htaccess', 'WordPress' ); // remove original WP rules so SuperCache rules go on top
if( insert_with_markers( $home_path.'.htaccess', 'WPSuperCache', explode( "\n", $rules ) ) && insert_with_markers( $home_path.'.htaccess', 'WordPress', explode( "\n", $wprules ) ) ) {
echo "Mod Rewrite rules updated! ";
echo "" . ABSPATH . ".htaccess has been updated with the necessary mod_rewrite rules. Please verify they are correct. They should look like this:
\n";
} else {
echo "Mod Rewrite rules must be updated! ";
echo " Your " . ABSPATH . ".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:
\n";
}
echo "
" . wp_specialchars( $rules ) . " \n";
} else {
?>
WP Super Cache has modified your .htaccess file. Click the following link to see the lines added. If you have upgraded the plugin make sure these rules match. View mod_rewrite rules
" . wp_specialchars( $rules ) . " \n"; ?>
Gzip encoding rules in {$cache_path}.htaccess created.";
}
?>Accepted filenames, rejected URIs ';
wp_cache_edit_rejected();
echo "Cache Plugins ';
echo $out;
echo 'Configuration messed up? ';
echo '\n";
echo '
Lock Down:
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.
Developers: Make your plugin lock down compatible by checking the 'WPLOCKDOWN' constant. The following code will make sure your plugin respects the WPLOCKDOWN setting.
if( defined( 'WPLOCKDOWN' ) && constant( 'WPLOCKDOWN' ) ) { WordPress is locked down. Super Cache static files will not be deleted when new comments are made. WordPress is not locked down. New comments will refresh Super Cache static files as normal. ';
echo "
";
wp_nonce_field('wp-cache');
echo "\n";
?>
Directly Cached Files (advanced use only) escape( $page );
if( $page != '' ) {
$cached_direct_pages[] = $page;
$out .= "'$page', ";
}
}
if( $out == '' ) {
$out = "'', ";
}
}
if( $valid_nonce && $_POST[ 'new_direct_page' ] && '' != $_POST[ 'new_direct_page' ] ) {
$page = str_replace( get_option( 'siteurl' ), '', $_POST[ 'new_direct_page' ] );
if( substr( $page, 0, 1 ) != '/' )
$page = '/' . $page;
$page = $wpdb->escape( $page );
if( in_array( $page, $cached_direct_pages ) == false ) {
$cached_direct_pages[] = $page;
$out .= "'$page', ";
}
}
if( $out != '' ) {
$out = substr( $out, 0, -2 );
$out = '$cached_direct_pages = array( ' . $out . ' );';
wp_cache_replace_line('^ *\$cached_direct_pages', "$out", $wp_cache_config_file);
prune_super_cache( $cache_path, true );
}
if( !empty( $expiredfiles ) ) {
foreach( $expiredfiles as $file ) {
if( $file != '' ) {
$firstfolder = explode( '/', $file );
$firstfolder = ABSPATH . $firstfolder[1];
$file = ABSPATH . $file;
@unlink( trailingslashit( $file ) . 'index.html' );
@unlink( trailingslashit( $file ) . 'index.html.gz' );
RecursiveFolderDelete( trailingslashit( $firstfolder ) );
}
}
}
if( $valid_nonce && $_POST[ 'deletepage' ] ) {
$page = preg_replace('/[ <>\'\"\r\n\t\(\)]/', '', str_replace( '..', '', $_POST['deletepage']) );
$pagefile = ABSPATH . $page . 'index.html';
$firstfolder = explode( '/', $page );
$firstfolder = ABSPATH . $firstfolder[1];
$page = ABSPATH . $page;
if( is_file( $pagefile ) && is_writable( $pagefile ) && is_writable( $firstfolder ) ) {
@unlink( $pagefile );
@unlink( $pagefile . '.gz' );
RecursiveFolderDelete( $firstfolder );
echo "$pagefile removed! WARNING! You must make writable to enable this feature. As this is a security risk please make it readonly after your page is generated.
WARNING! is writable. Please make it readonly after your page is generated as this is a security risk.
';
if( is_array( $cached_direct_pages ) ) {
$out = '';
foreach( $cached_direct_pages as $page ) {
if( $page == '' )
continue;
$generated = '';
if( is_file( ABSPATH . $page . '/index.html' ) )
$generated = '$generated Existing direct page Delete cached file 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.
";
if( $readonly != 'READONLY' ) {
echo "For example: to cache '" . trailingslashit( get_option( 'siteurl' ) ) . "about/' , 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.
";
echo "Make the textbox blank to remove it from the list of direct pages and delete the cached file.
";
}
wp_nonce_field('wp-cache');
if( $readonly != 'READONLY' )
echo "
";
echo "\n";
?> 0) {
$cache_max_time = $max_time;
wp_cache_replace_line('^ *\$cache_max_time', "\$cache_max_time = $cache_max_time;", $wp_cache_config_file);
}
}
if(isset($_POST['super_cache_max_time']) && $valid_nonce) {
$max_time = (int)$_POST['super_cache_max_time'];
if ($max_time > 0) {
$super_cache_max_time = $max_time;
wp_cache_replace_line('^ *\$super_cache_max_time', "\$super_cache_max_time = $super_cache_max_time;", $wp_cache_config_file);
}
}
?>
Expiry Time ';
echo 'Expire time: ';
echo "Super Cache Expire time: ';
echo "
';
wp_nonce_field('wp-cache');
echo "\n";
?> Rejected User Agents ';
echo "Strings in the HTTP 'User Agent' header that prevent WP-Cache from
caching bot, spiders, and crawlers' requests.
Note that cached files are still sent to these request if they already exists.
\n";
echo '';
echo "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.
\n";
echo '\n";
}
function wp_cache_edit_accepted() {
global $cache_acceptable_files, $cache_rejected_uri, $wp_cache_config_file, $valid_nonce;
if(isset($_REQUEST['wp_accepted_files']) && $valid_nonce) {
$text = wp_cache_sanitize_value($_REQUEST['wp_accepted_files'], $cache_acceptable_files);
wp_cache_replace_line('^ *\$cache_acceptable_files', "\$cache_acceptable_files = $text;", $wp_cache_config_file);
}
echo "Add here those filenames that can be cached, even if they match one of the rejected substring specified above.
\n";
echo '\n";
}
function wp_cache_enable() {
global $wp_cache_config_file, $cache_enabled, $supercachedir;
if(get_option('gzipcompression')) {
echo "Error: GZIP compression is enabled, disable it if you want to enable wp-cache. Warning : GZIP compression is enabled in Wordpress, wp-cache will be bypassed until you disable gzip compression.Error: Your cache directory ($cache_path ) did not exist and couldn't be created by the web server. Error: Your cache directory ($cache_path ) or $dir need to be writable for this plugin to work. Error: Your WP-Cache config file ($wp_cache_config_file ) is out of date and not writable by the Web server.Error: Configuration file missing and wp-content directory ($dir ) is not writable by the Web server.Error: Sample WP-Cache config file ($wp_cache_config_file_sample ) does not exist.advanced-cache.php does not existln -s $wp_cache_file $wp_cache_linkError: WP_CACHE is not enabled in your wp-config.php file and I couldn't modified it.$global and add the following line: define('WP_CACHE', true);WP-Cache will not be executed by Wordpress core. Cache contents ';
/*
echo '\n";
*/
$list_files = false; // it doesn't list supercached files, and removing single pages is buggy
$count = 0;
$expired = 0;
$now = time();
if ( ($handle = @opendir( $cache_path . 'meta/' )) ) {
if ($list_files) echo "";
while ( false !== ($file = readdir($handle))) {
if ( preg_match("/^$file_prefix.*\.meta/", $file) ) {
$this_expired = false;
$content_file = preg_replace("/meta$/", "html", $file);
$mtime = filemtime($cache_path . 'meta/' . $file);
if ( ! ($fsize = @filesize($cache_path.$content_file)) )
continue; // .meta does not exists
$fsize = intval($fsize/1024);
$age = $now - $mtime;
if ( $age > $cache_max_time) {
$expired++;
$this_expired = true;
}
$count++;
if ($list_files) {
$meta = new CacheMeta;
$meta = unserialize(file_get_contents($cache_path . 'meta/' . $file));
echo $flip ? '' : ' ';
$flip = !$flip;
echo '';
echo $meta->uri . " $age secs $age secs ";
echo "$fsize KB ";
echo ' \n";
}
}
}
closedir($handle);
if ($list_files) echo "
";
}
if( $cache_enabled == true && $super_cache_enabled == true ) {
$now = time();
$sizes = array( 'expired' => 0, 'cached' => 0, 'ts' => 0 );
if (is_dir($supercachedir)) {
$entries = glob($supercachedir. '/*');
foreach ($entries as $entry) {
if ($entry != '.' && $entry != '..') {
$sizes = wpsc_dirsize( $entry, $sizes );
}
}
} else {
if(is_file($supercachedir) && filemtime( $supercachedir ) + $super_cache_max_time <= $now )
$sizes[ 'expired' ] ++;
}
$sizes[ 'ts' ] = time();
}
echo "WP-Cache
";
echo "$count cached pages ";
echo "$expired expired pages WP-Super-Cache
";
echo "" . intval($sizes['cached']/2) . " cached pages ";
$age = intval(($now - $sizes['ts'])/60);
echo "" . intval($sizes['expired']/2) . " expired pages. is Digg proof thanks to caching by WP Super Cache !