/184.168.182.1/wp-content/plugins/welcome-to-wordpress/resources/object_cache/apc.object-cache.php
PHP | 380 lines | 274 code | 85 blank | 21 comment | 51 complexity | 7aba9c31d335abaa7b9f4570c89ffb8c MD5 | raw file
- <?php
- /*
- Plugin Name: APC Object Cache
- Description: APC backend for the WP Object Cache.
- Version: 2.0.5
- URI: http://txfx.net/wordpress-plugins/apc/
- Author: Mark Jaquith
- Author URI: http://coveredwebservices.com/
- Install this file to wp-content/object-cache.php
- Based on Ryan Boren's Memcached object cache backend
- http://wordpress.org/extend/plugins/memcached/
- */
- if ( function_exists( 'apc_fetch' ) ) :
- if ( version_compare( '5.2.4', phpversion(), '>=' ) ) {
- wp_die( 'The APC object cache backend requires PHP 5.2 or higher. You are running ' . phpversion() . '. Please remove the <code>object-cache.php</code> file from your content directory.' );
- }
- if ( function_exists( 'wp_cache_add' ) ) {
- // Regular die, not wp_die(), because it gets sandboxed and shown in a small iframe
- die( '<strong>ERROR:</strong> This is <em>not</em> a plugin, and it should not be activated as one.<br /><br />Instead, <code>' . str_replace( $_SERVER['DOCUMENT_ROOT'], '', __FILE__ ) . '</code> must be moved to <code>' . str_replace( $_SERVER['DOCUMENT_ROOT'], '', trailingslashit( WP_CONTENT_DIR ) ) . 'object-cache.php</code>' );
- } else {
- // Users with setups where multiple installs share a common wp-config.php can use this
- // to guarantee uniqueness for the keys generated by this object cache
- if ( !defined( 'WP_APC_KEY_SALT' ) )
- define( 'WP_APC_KEY_SALT', 'wp' );
- function wp_cache_add( $key, $data, $group = '', $expire = 0 ) {
- global $wp_object_cache;
- return $wp_object_cache->add( $key, $data, $group, $expire );
- }
- function wp_cache_incr( $key, $n = 1, $group = '' ) {
- global $wp_object_cache;
- return $wp_object_cache->incr2( $key, $n, $group );
- }
- function wp_cache_decr( $key, $n = 1, $group = '' ) {
- global $wp_object_cache;
- return $wp_object_cache->decr( $key, $n, $group );
- }
- function wp_cache_close() {
- return true;
- }
- function wp_cache_delete( $key, $group = '' ) {
- global $wp_object_cache;
- return $wp_object_cache->delete( $key, $group );
- }
- function wp_cache_flush() {
- global $wp_object_cache;
- return $wp_object_cache->flush();
- }
- function wp_cache_get( $key, $group = '', $force = false ) {
- global $wp_object_cache;
- return $wp_object_cache->get( $key, $group, $force );
- }
- function wp_cache_init() {
- global $wp_object_cache;
- $wp_object_cache = new APC_Object_Cache();
- }
- function wp_cache_replace( $key, $data, $group = '', $expire = 0 ) {
- global $wp_object_cache;
- return $wp_object_cache->replace( $key, $data, $group, $expire );
- }
- function wp_cache_set( $key, $data, $group = '', $expire = 0 ) {
- global $wp_object_cache;
- if ( defined('WP_INSTALLING') == false )
- return $wp_object_cache->set( $key, $data, $group, $expire );
- else
- return $wp_object_cache->delete( $key, $group );
- }
- function wp_cache_switch_to_blog( $blog_id ) {
- global $wp_object_cache;
- return $wp_object_cache->switch_to_blog( $blog_id );
- }
- function wp_cache_add_global_groups( $groups ) {
- global $wp_object_cache;
- $wp_object_cache->add_global_groups( $groups );
- }
- function wp_cache_add_non_persistent_groups( $groups ) {
- global $wp_object_cache;
- $wp_object_cache->add_non_persistent_groups( $groups );
- }
- class WP_Object_Cache {
- var $global_groups = array();
- var $no_mc_groups = array();
- var $cache = array();
- var $stats = array( 'get' => 0, 'delete' => 0, 'add' => 0 );
- var $group_ops = array();
- var $cache_enabled = true;
- var $default_expiration = 0;
- var $abspath = '';
- var $debug = false;
- function add( $id, $data, $group = 'default', $expire = 0 ) {
- $key = $this->key( $id, $group );
- if ( is_object( $data ) )
- $data = clone $data;
- $store_data = $data;
- if ( is_array( $data ) )
- $store_data = new ArrayObject( $data );
- if ( in_array( $group, $this->no_mc_groups ) ) {
- $this->cache[$key] = $data;
- return true;
- } elseif ( isset( $this->cache[$key] ) && $this->cache[$key] !== false ) {
- return false;
- }
- $expire = ( $expire == 0 ) ? $this->default_expiration : $expire;
- $result = apc_add( $key, $store_data, $expire );
- if ( false !== $result ) {
- @ ++$this->stats['add'];
- $this->group_ops[$group][] = "add $id";
- $this->cache[$key] = $data;
- }
- return $result;
- }
- function add_global_groups( $groups ) {
- if ( !is_array( $groups ) )
- $groups = (array) $groups;
- $this->global_groups = array_merge( $this->global_groups, $groups );
- $this->global_groups = array_unique( $this->global_groups );
- }
- function add_non_persistent_groups( $groups ) {
- if ( !is_array( $groups ) )
- $groups = (array) $groups;
- $this->no_mc_groups = array_merge( $this->no_mc_groups, $groups );
- $this->no_mc_groups = array_unique( $this->no_mc_groups );
- }
- // This is named incr2 because Batcache looks for incr
- // We will define that in a class extension if it is available (APC 3.1.1 or higher)
- function incr2( $id, $n = 1, $group = 'default' ) {
- $key = $this->key( $id, $group );
- if ( function_exists( 'apc_inc' ) )
- return apc_inc( $key, $n );
- else
- return false;
- }
- function decr( $id, $n = 1, $group = 'default' ) {
- $key = $this->key( $id, $group );
- if ( function_exists( 'apc_dec' ) )
- return apc_dec( $id, $n );
- else
- return false;
- }
- function close() {
- return true;
- }
- function delete( $id, $group = 'default' ) {
- $key = $this->key( $id, $group );
- if ( in_array( $group, $this->no_mc_groups ) ) {
- unset( $this->cache[$key] );
- return true;
- }
- $result = apc_delete( $key );
- @ ++$this->stats['delete'];
- $this->group_ops[$group][] = "delete $id";
- if ( false !== $result )
- unset( $this->cache[$key] );
- return $result;
- }
- function flush() {
- // Don't flush if multi-blog.
- if ( function_exists( 'is_site_admin' ) || defined( 'CUSTOM_USER_TABLE' ) && defined( 'CUSTOM_USER_META_TABLE' ) )
- return true;
- $this->cache = array();
- return apc_clear_cache( 'user' );
- }
- function get($id, $group = 'default', $force = false) {
- $key = $this->key($id, $group);
- if ( isset($this->cache[$key]) && ( !$force || in_array($group, $this->no_mc_groups) ) ) {
- if ( is_object( $this->cache[$key] ) )
- $value = clone $this->cache[$key];
- else
- $value = $this->cache[$key];
- } else if ( in_array($group, $this->no_mc_groups) ) {
- $this->cache[$key] = $value = false;
- } else {
- $value = apc_fetch( $key );
- if ( is_object( $value ) && 'ArrayObject' == get_class( $value ) )
- $value = $value->getArrayCopy();
- if ( NULL === $value )
- $value = false;
- $this->cache[$key] = ( is_object( $value ) ) ? clone $value : $value;
- }
- @ ++$this->stats['get'];
- $this->group_ops[$group][] = "get $id";
- if ( 'checkthedatabaseplease' === $value ) {
- unset( $this->cache[$key] );
- $value = false;
- }
- return $value;
- }
- function key( $key, $group ) {
- if ( empty( $group ) )
- $group = 'default';
- if ( false !== array_search( $group, $this->global_groups ) )
- $prefix = $this->global_prefix;
- else
- $prefix = $this->blog_prefix;
- return WP_APC_KEY_SALT . ':' . $this->abspath . ":$prefix$group:$key";
- }
- function replace( $id, $data, $group = 'default', $expire = 0 ) {
- return $this->set( $id, $data, $group, $expire );
- }
- function set( $id, $data, $group = 'default', $expire = 0 ) {
- $key = $this->key( $id, $group );
- if ( isset( $this->cache[$key] ) && ('checkthedatabaseplease' === $this->cache[$key] ) )
- return false;
- if ( is_object( $data ) )
- $data = clone $data;
- $store_data = $data;
- if ( is_array( $data ) )
- $store_data = new ArrayObject( $data );
- $this->cache[$key] = $data;
- if ( in_array( $group, $this->no_mc_groups ) )
- return true;
- $expire = ( $expire == 0 ) ? $this->default_expiration : $expire;
- $result = apc_store( $key, $store_data, $expire );
- return $result;
- }
- function switch_to_blog( $blog_id ) {
- $blog_id = (int) $blog_id;
- $this->blog_prefix = ( is_multisite() ? $blog_id : $table_prefix ) . ':';
- }
- function colorize_debug_line( $line ) {
- $colors = array(
- 'get' => 'green',
- 'set' => 'purple',
- 'add' => 'blue',
- 'delete' => 'red');
- $cmd = substr( $line, 0, strpos( $line, ' ' ) );
- $cmd2 = "<span style='color:{$colors[$cmd]}'>$cmd</span>";
- return $cmd2 . substr( $line, strlen( $cmd ) ) . "\n";
- }
- function stats() {
- echo "<p>\n";
- foreach ( $this->stats as $stat => $n ) {
- echo "<strong>$stat</strong> $n";
- echo "<br/>\n";
- }
- echo "</p>\n";
- echo "<h3>APC:</h3>";
- foreach ( $this->group_ops as $group => $ops ) {
- if ( !isset( $_GET['debug_queries'] ) && 500 < count( $ops ) ) {
- $ops = array_slice( $ops, 0, 500 );
- echo "<big>Too many to show! <a href='" . add_query_arg( 'debug_queries', 'true' ) . "'>Show them anyway</a>.</big>\n";
- }
- echo "<h4>$group commands</h4>";
- echo "<pre>\n";
- $lines = array();
- foreach ( $ops as $op ) {
- $lines[] = $this->colorize_debug_line($op);
- }
- print_r($lines);
- echo "</pre>\n";
- }
- if ( $this->debug ) {
- $apc_info = apc_cache_info();
- echo "<p>";
- echo "<strong>Cache Hits:</strong> {$apc_info['num_hits']}<br/>\n";
- echo "<strong>Cache Misses:</strong> {$apc_info['num_misses']}\n";
- echo "</p>\n";
- }
- }
- function WP_Object_Cache() {
- $this->abspath = md5( ABSPATH );
- global $blog_id, $table_prefix;
- $this->global_prefix = '';
- $this->blog_prefix = '';
- if ( function_exists( 'is_multisite' ) ) {
- $this->global_prefix = ( is_multisite() || defined('CUSTOM_USER_TABLE') && defined('CUSTOM_USER_META_TABLE') ) ? '' : $table_prefix;
- $this->blog_prefix = ( is_multisite() ? $blog_id : $table_prefix ) . ':';
- }
- $this->cache_hits =& $this->stats['get'];
- $this->cache_misses =& $this->stats['add'];
- }
- }
- if ( function_exists( 'apc_inc' ) ) {
- class APC_Object_Cache extends WP_Object_Cache {
- function incr( $id, $n = 1, $group = 'default' ) {
- return parent::incr2( $id, $n, $group );
- }
- }
- } else {
- class APC_Object_Cache extends WP_Object_Cache {
- // Blank
- }
- }
- } // !function_exists( 'wp_cache_add' )
- else : // No APC
- function apc_not_actually_running() {
- $GLOBALS['_wp_using_ext_object_cache'] = false;
- unset( $GLOBALS['wp_filter']['all'][-100]['apc_not_actually_running'] );
- }
- $GLOBALS['_wp_using_ext_object_cache'] = false; // This will get overridden as of WP 3.5, so we have to hook in to 'all':
- $GLOBALS['wp_filter']['all'][-100]['apc_not_actually_running'] = array( 'function' => 'apc_not_actually_running', 'accepted_args' => 0 );
- require_once ( ABSPATH . WPINC . '/cache.php' );
- endif;