WordPress APCu Object Cache
| <?php # -*- coding: utf-8 -*- | |
| /** | |
| * Name: WP APCu Object Cache | |
| * Description: WordPress APCu Object Cache | |
| * Author: Daniel Hüsken | |
| * Author URI: https://dhue.de | |
| * Version: 1.0.0 | |
| * | |
| * @link https://codex.wordpress.org/Function_Reference/WP_Cache | |
| * @link https://pecl.php.net/package/APCu | |
| * | |
| */ | |
| /** | |
| * Adds data to the cache, if the cache key doesn't already exist. | |
| * | |
| * @since 2.0.0 | |
| * @uses $wp_object_cache Object Cache Class | |
| * @see WP_Object_Cache::add() | |
| * | |
| * @param int|string $key The cache key to use for retrieval later | |
| * @param mixed $data The data to add to the cache store | |
| * @param string $group The group to add the cache to | |
| * @param int $expire When the cache data should be expired | |
| * @return bool False if cache key and group already exist, true on success | |
| */ | |
| function wp_cache_add( $key, $data, $group = '', $expire = 0 ) { | |
| global $wp_object_cache; | |
| return $wp_object_cache->add( $key, $data, $group, (int) $expire ); | |
| } | |
| /** | |
| * Closes the cache. | |
| * | |
| * This function has ceased to do anything since WordPress 2.5. The | |
| * functionality was removed along with the rest of the persistent cache. This | |
| * does not mean that plugins can't implement this function when they need to | |
| * make sure that the cache is cleaned up after WordPress no longer needs it. | |
| * | |
| * @since 2.0.0 | |
| * | |
| * @return bool Always returns True | |
| */ | |
| function wp_cache_close() { | |
| return true; | |
| } | |
| /** | |
| * Decrement numeric cache item's value | |
| * | |
| * @since 3.3.0 | |
| * @uses $wp_object_cache Object Cache Class | |
| * @see WP_Object_Cache::decr() | |
| * | |
| * @param int|string $key The cache key to increment | |
| * @param int $offset The amount by which to decrement the item's value. Default is 1. | |
| * @param string $group The group the key is in. | |
| * @return false|int False on failure, the item's new value on success. | |
| */ | |
| function wp_cache_decr( $key, $offset = 1, $group = '' ) { | |
| global $wp_object_cache; | |
| return $wp_object_cache->decr( $key, $offset, $group ); | |
| } | |
| /** | |
| * Removes the cache contents matching key and group. | |
| * | |
| * @since 2.0.0 | |
| * @uses $wp_object_cache Object Cache Class | |
| * @see WP_Object_Cache::delete() | |
| * | |
| * @param int|string $key What the contents in the cache are called | |
| * @param string $group Where the cache contents are grouped | |
| * @return bool True on successful removal, false on failure | |
| */ | |
| function wp_cache_delete($key, $group = '') { | |
| global $wp_object_cache; | |
| return $wp_object_cache->delete($key, $group); | |
| } | |
| /** | |
| * Removes all cache items. | |
| * | |
| * @since 2.0.0 | |
| * @uses $wp_object_cache Object Cache Class | |
| * @see WP_Object_Cache::flush() | |
| * | |
| * @return bool False on failure, true on success | |
| */ | |
| function wp_cache_flush() { | |
| global $wp_object_cache; | |
| return $wp_object_cache->flush(); | |
| } | |
| /** | |
| * Retrieves the cache contents from the cache by key and group. | |
| * | |
| * @since 2.0.0 | |
| * @uses $wp_object_cache Object Cache Class | |
| * @see WP_Object_Cache::get() | |
| * | |
| * @param int|string $key What the contents in the cache are called | |
| * @param string $group Where the cache contents are grouped | |
| * @param bool $force Whether to force an update of the local cache from the persistent cache (default is false) | |
| * @param bool &$found Whether key was found in the cache. Disambiguates a return of false, a storable value. | |
| * @return bool|mixed False on failure to retrieve contents or the cache | |
| * contents on success | |
| */ | |
| function wp_cache_get( $key, $group = '', $force = false, &$found = null ) { | |
| global $wp_object_cache; | |
| return $wp_object_cache->get( $key, $group, $force, $found ); | |
| } | |
| /** | |
| * Increment numeric cache item's value | |
| * | |
| * @since 3.3.0 | |
| * @uses $wp_object_cache Object Cache Class | |
| * @see WP_Object_Cache::incr() | |
| * | |
| * @param int|string $key The cache key to increment | |
| * @param int $offset The amount by which to increment the item's value. Default is 1. | |
| * @param string $group The group the key is in. | |
| * @return false|int False on failure, the item's new value on success. | |
| */ | |
| function wp_cache_incr( $key, $offset = 1, $group = '' ) { | |
| global $wp_object_cache; | |
| return $wp_object_cache->incr( $key, $offset, $group ); | |
| } | |
| /** | |
| * Sets up Object Cache Global and assigns it. | |
| * | |
| * @since 2.0.0 | |
| * @global WP_APCu_Object_Cache $wp_object_cache WordPress Object Cache | |
| */ | |
| function wp_cache_init() { | |
| $GLOBALS['wp_object_cache'] = new WP_APCu_Object_Cache(); | |
| } | |
| /** | |
| * Replaces the contents of the cache with new data. | |
| * | |
| * @since 2.0.0 | |
| * @uses $wp_object_cache Object Cache Class | |
| * @see WP_Object_Cache::replace() | |
| * | |
| * @param int|string $key What to call the contents in the cache | |
| * @param mixed $data The contents to store in the cache | |
| * @param string $group Where to group the cache contents | |
| * @param int $expire When to expire the cache contents | |
| * @return bool False if not exists, true if contents were replaced | |
| */ | |
| function wp_cache_replace( $key, $data, $group = '', $expire = 0 ) { | |
| global $wp_object_cache; | |
| return $wp_object_cache->replace( $key, $data, $group, (int) $expire ); | |
| } | |
| /** | |
| * Saves the data to the cache. | |
| * | |
| * @since 2.0.0 | |
| * | |
| * @uses $wp_object_cache Object Cache Class | |
| * @see WP_Object_Cache::set() | |
| * | |
| * @param int|string $key What to call the contents in the cache | |
| * @param mixed $data The contents to store in the cache | |
| * @param string $group Where to group the cache contents | |
| * @param int $expire When to expire the cache contents | |
| * @return bool False on failure, true on success | |
| */ | |
| function wp_cache_set( $key, $data, $group = '', $expire = 0 ) { | |
| global $wp_object_cache; | |
| return $wp_object_cache->set( $key, $data, $group, (int) $expire ); | |
| } | |
| /** | |
| * Switch the interal blog id. | |
| * | |
| * This changes the blog id used to create keys in blog specific groups. | |
| * | |
| * @since 3.5.0 | |
| * | |
| * @param int $blog_id Blog ID | |
| */ | |
| function wp_cache_switch_to_blog( $blog_id ) { | |
| global $wp_object_cache; | |
| return $wp_object_cache->switch_to_blog( $blog_id ); | |
| } | |
| /** | |
| * Adds a group or set of groups to the list of global groups. | |
| * | |
| * @since 2.6.0 | |
| * | |
| * @param string|array $groups A group or an array of groups to add | |
| */ | |
| function wp_cache_add_global_groups( $groups ) { | |
| global $wp_object_cache; | |
| return $wp_object_cache->add_global_groups( $groups ); | |
| } | |
| /** | |
| * Adds a group or set of groups to the list of non-persistent groups. | |
| * | |
| * @since 2.6.0 | |
| * | |
| * @param string|array $groups A group or an array of groups to add | |
| */ | |
| function wp_cache_add_non_persistent_groups( $groups ) { | |
| global $wp_object_cache; | |
| return $wp_object_cache->add_non_persistent_groups( $groups ); | |
| } | |
| /** | |
| * Reset internal cache keys and structures. If the cache backend uses global | |
| * blog or site IDs as part of its cache keys, this function instructs the | |
| * backend to reset those keys and perform any cleanup since blog or site IDs | |
| * have changed since cache init. | |
| * | |
| * This function is deprecated. Use wp_cache_switch_to_blog() instead of this | |
| * function when preparing the cache for a blog switch. For clearing the cache | |
| * during unit tests, consider using wp_cache_init(). wp_cache_init() is not | |
| * recommended outside of unit tests as the performance penality for using it is | |
| * high. | |
| * | |
| * @since 2.6.0 | |
| * @deprecated 3.5.0 | |
| */ | |
| function wp_cache_reset() { | |
| _deprecated_function( __FUNCTION__, '3.5' ); | |
| global $wp_object_cache; | |
| return $wp_object_cache->reset(); | |
| } | |
| /** | |
| * WordPress APCu Object Cache | |
| * | |
| * @subpackage Cache | |
| * @since WP 2.0.0 | |
| */ | |
| class WP_APCu_Object_Cache { | |
| /** | |
| * Holds the local cached objects | |
| * | |
| * @var array | |
| * @access private | |
| * @since 2.0.0 | |
| */ | |
| private $cache = array(); | |
| /** | |
| * The amount of times the cache data was already stored in the cache. | |
| * | |
| * @since WP 2.5.0 | |
| * @access private | |
| * @var int | |
| */ | |
| private $cache_hits = 0; | |
| /** | |
| * Amount of times the cache did not have the request in cache | |
| * | |
| * @var int | |
| * @access public | |
| * @since WP 2.0.0 | |
| */ | |
| public $cache_misses = 0; | |
| /** | |
| * The amount of times the APCu cache data was already stored in the cache. | |
| * | |
| * @since WP 2.5.0 | |
| * @access private | |
| * @var int | |
| */ | |
| private $apcu_cache_hits = 0; | |
| /** | |
| * Amount of times the APCu cache did not have the request in cache | |
| * | |
| * @var int | |
| * @access public | |
| * @since WP 2.0.0 | |
| */ | |
| public $apcu_cache_misses = 0; | |
| /** | |
| * List of global groups | |
| * | |
| * @var array | |
| * @access protected | |
| * @since WP 3.0.0 | |
| */ | |
| protected $global_groups = array(); | |
| /** | |
| * The blog prefix to prepend to keys in non-global groups. | |
| * | |
| * @var int | |
| * @access private | |
| * @since WP 3.5.0 | |
| */ | |
| private $blog_prefix; | |
| /** | |
| * Holds the value of `is_multisite()` | |
| * | |
| * @var bool | |
| * @access private | |
| * @since WP 3.5.0 | |
| */ | |
| private $multisite; | |
| /** | |
| * Cache key prefix for multiple WordPress installations on one host | |
| * | |
| * @var string | |
| * @access private | |
| */ | |
| private $prefix; | |
| /** | |
| * List of non persistent groups | |
| * | |
| * @var array | |
| * @access private | |
| * @since WP 2.6.0 | |
| */ | |
| private $non_persistent_groups = array(); | |
| /** | |
| * Make private properties readable for backwards compatibility. | |
| * | |
| * @since WP 4.0.0 | |
| * @access public | |
| * | |
| * @param string $name Property to get. | |
| * @return mixed Property. | |
| */ | |
| public function __get( $name ) { | |
| return $this->$name; | |
| } | |
| /** | |
| * Make private properties settable for backwards compatibility. | |
| * | |
| * @since WP 4.0.0 | |
| * @access public | |
| * | |
| * @param string $name Property to set. | |
| * @param mixed $value Property value. | |
| * @return mixed Newly-set property. | |
| */ | |
| public function __set( $name, $value ) { | |
| return $this->$name = $value; | |
| } | |
| /** | |
| * Make private properties checkable for backwards compatibility. | |
| * | |
| * @since WP 4.0.0 | |
| * @access public | |
| * | |
| * @param string $name Property to check if set. | |
| * @return bool Whether the property is set. | |
| */ | |
| public function __isset( $name ) { | |
| return isset( $this->$name ); | |
| } | |
| /** | |
| * Make private properties un-settable for backwards compatibility. | |
| * | |
| * @since WP 4.0.0 | |
| * @access public | |
| * | |
| * @param string $name Property to unset. | |
| */ | |
| public function __unset( $name ) { | |
| unset( $this->$name ); | |
| } | |
| /** | |
| * Adds data to the cache if it doesn't already exist. | |
| * | |
| * @uses WP_Object_Cache::_exists Checks to see if the cache already has data. | |
| * @uses WP_Object_Cache::set Sets the data after the checking the cache | |
| * contents existence. | |
| * | |
| * @since WP 2.0.0 | |
| * | |
| * @param int|string $key What to call the contents in the cache | |
| * @param mixed $data The contents to store in the cache | |
| * @param string $group Where to group the cache contents | |
| * @param int $expire When to expire the cache contents | |
| * @return bool False if cache key and group already exist, true on success | |
| */ | |
| public function add( $key, $data, $group = 'default', $expire = 0 ) { | |
| if ( wp_suspend_cache_addition() ) { | |
| return false; | |
| } | |
| if ( empty( $group ) ) { | |
| $group = 'default'; | |
| } | |
| $id = $key; | |
| if ( $this->multisite && ! isset( $this->global_groups[ $group ] ) ) { | |
| $id = $this->blog_prefix . $key; | |
| } | |
| if ( function_exists( 'apcu_exists' ) && apcu_exists( $this->prefix . ':' . $group . ':' . $id ) ) { | |
| return FALSE; | |
| } | |
| if ( isset( $this->non_persistent_groups[ $group ] ) && isset( $this->cache[ $group ][ $id ] ) ) { | |
| return FALSE; | |
| } | |
| return $this->set( $key, $data, $group, (int) $expire ); | |
| } | |
| /** | |
| * Sets the list of global groups. | |
| * | |
| * @since WP 3.0.0 | |
| * | |
| * @param array $groups List of groups that are global. | |
| */ | |
| public function add_global_groups( $groups ) { | |
| $groups = (array) $groups; | |
| $groups = array_fill_keys( $groups, true ); | |
| $this->global_groups = array_merge( $this->global_groups, $groups ); | |
| } | |
| /** | |
| * Sets the list of non persistent groups. | |
| * | |
| * @since WP 2.6.0 | |
| * | |
| * @param array $groups List of non persistent groups. | |
| */ | |
| public function add_non_persistent_groups( $groups ) { | |
| $groups = (array) $groups; | |
| $groups = array_fill_keys( $groups, true ); | |
| $this->non_persistent_groups = array_merge( $this->non_persistent_groups, $groups ); | |
| } | |
| /** | |
| * Decrement numeric cache item's value | |
| * | |
| * @since WP 3.3.0 | |
| * | |
| * @param int|string $key The cache key to increment | |
| * @param int $offset The amount by which to decrement the item's value. Default is 1. | |
| * @param string $group The group the key is in. | |
| * @return false|int False on failure, the item's new value on success. | |
| */ | |
| public function decr( $key, $offset = 1, $group = 'default' ) { | |
| if ( empty( $group ) ) { | |
| $group = 'default'; | |
| } | |
| if ( $this->multisite && ! isset( $this->global_groups[ $group ] ) ) { | |
| $key = $this->blog_prefix . $key; | |
| } | |
| if ( ! isset( $this->cache[ $group ][ $key ] ) || ! is_numeric( $this->cache[ $group ][ $key ] ) ) { | |
| $this->cache[ $group ][ $key ] = 0; | |
| } | |
| $offset = (int) $offset; | |
| $this->cache[ $group ][ $key ] -= $offset; | |
| if ( $this->cache[ $group ][ $key ] < 0 ) { | |
| $this->cache[ $group ][ $key ] = 0; | |
| } | |
| if ( function_exists( 'apcu_dec' ) && ! isset( $this->non_persistent_groups[ $group ] ) ) { | |
| if ( ! apcu_exists( $this->prefix . ':' . $group . ':' . $key ) ) { | |
| return FALSE; | |
| } | |
| $this->cache[ $group ][ $key ] = apcu_dec($this->prefix . ':' . $group . ':' . $key, $offset ); | |
| if ( $this->cache[ $group ][ $key ] < 0 ) { | |
| apcu_store( $this->prefix . ':' . $group . ':' . $key, 0 ); | |
| $this->cache[ $group ][ $key ] = 0; | |
| } | |
| } | |
| return $this->cache[ $group ][ $key ]; | |
| } | |
| /** | |
| * Remove the contents of the cache key in the group | |
| * | |
| * If the cache key does not exist in the group, then nothing will happen. | |
| * | |
| * @since WP 2.0.0 | |
| * | |
| * @param int|string $key What the contents in the cache are called | |
| * @param string $group Where the cache contents are grouped | |
| * | |
| * @return bool False if the contents weren't deleted and true on success | |
| */ | |
| public function delete( $key, $group = 'default' ) { | |
| if ( empty( $group ) ) { | |
| $group = 'default'; | |
| } | |
| if ( $this->multisite && ! isset( $this->global_groups[ $group ] ) ) { | |
| $key = $this->blog_prefix . $key; | |
| } | |
| if ( isset( $this->cache[ $group ][ $key ] ) ) { | |
| unset( $this->cache[ $group ][ $key ] ); | |
| } | |
| if ( !isset( $this->non_persistent_groups[ $group ] ) && function_exists( 'apcu_delete' ) ) { | |
| return apcu_delete( $this->prefix . ':' . $group . ':' . $key ); | |
| } else { | |
| return TRUE; | |
| } | |
| } | |
| /** | |
| * Clears the object cache of all data | |
| * | |
| * @since WP 2.0.0 | |
| * | |
| * @return bool Always returns true | |
| */ | |
| public function flush() { | |
| $this->cache = array(); | |
| if ( function_exists( 'apcu_cache_info' ) ) { | |
| $cache_info = apcu_cache_info(); | |
| if ( ! empty( $cache_info[ 'cache_list' ] ) ) { | |
| foreach( $cache_info[ 'cache_list' ] as $entry ) { | |
| if ( strstr( $entry[ 'info' ], $this->prefix . ':' ) ) { | |
| apcu_delete( $entry[ 'info' ] ); | |
| } | |
| } | |
| } | |
| } | |
| return true; | |
| } | |
| /** | |
| * Retrieves the cache contents, if it exists | |
| * | |
| * The contents will be first attempted to be retrieved by searching by the | |
| * key in the cache group. If the cache is hit (success) then the contents | |
| * are returned. | |
| * | |
| * On failure, the number of cache misses will be incremented. | |
| * | |
| * @since WP 2.0.0 | |
| * | |
| * @param int|string $key What the contents in the cache are called | |
| * @param string $group Where the cache contents are grouped | |
| * @param bool $force Whether to force a refetch rather than relying on the local cache (default is false) | |
| * @return bool|mixed False on failure to retrieve contents or the cache | |
| * contents on success | |
| */ | |
| public function get( $key, $group = 'default', $force = false, &$found = null ) { | |
| if ( empty( $group ) ) { | |
| $group = 'default'; | |
| } | |
| if ( $this->multisite && ! isset( $this->global_groups[ $group ] ) ) { | |
| $key = $this->blog_prefix . $key; | |
| } | |
| if ( isset( $this->cache[ $group ][ $key ] ) && ( isset( $this->non_persistent_groups[ $group ] ) || ! $force ) ) { | |
| $found = true; | |
| $this->cache_hits += 1; | |
| if ( is_object( $this->cache[ $group ][ $key ] ) ) { | |
| return clone $this->cache[ $group ][ $key ]; | |
| } else { | |
| return $this->cache[ $group ][ $key ]; | |
| } | |
| } elseif ( function_exists( 'apcu_fetch' ) && ! isset( $this->non_persistent_groups[ $group ] ) ) { | |
| $this->cache[ $group ][ $key ] = apcu_fetch( $this->prefix . ':' . $group . ':' . $key, $found ); | |
| if ( $found ) { | |
| $this->apcu_cache_hits += 1; | |
| if ( is_object( $this->cache[ $group ][ $key ] ) ) { | |
| return clone $this->cache[ $group ][ $key ]; | |
| } else { | |
| return $this->cache[ $group ][ $key ]; | |
| } | |
| } else { | |
| $this->apcu_cache_misses += 1; | |
| return FALSE; | |
| } | |
| } | |
| $found = FALSE; | |
| $this->cache_misses += 1; | |
| return FALSE; | |
| } | |
| /** | |
| * Increment numeric cache item's value | |
| * | |
| * @since WP 3.3.0 | |
| * | |
| * @param int|string $key The cache key to increment | |
| * @param int $offset The amount by which to increment the item's value. Default is 1. | |
| * @param string $group The group the key is in. | |
| * @return false|int False on failure, the item's new value on success. | |
| */ | |
| public function incr( $key, $offset = 1, $group = 'default' ) { | |
| if ( empty( $group ) ) { | |
| $group = 'default'; | |
| } | |
| if ( $this->multisite && ! isset( $this->global_groups[ $group ] ) ) { | |
| $key = $this->blog_prefix . $key; | |
| } | |
| if ( ! isset( $this->cache[ $group ][ $key ] ) || ! is_numeric( $this->cache[ $group ][ $key ] ) ) { | |
| $this->cache[ $group ][ $key ] = 0; | |
| } | |
| $offset = (int) $offset; | |
| $this->cache[ $group ][ $key ] += $offset; | |
| if ( $this->cache[ $group ][ $key ] < 0 ) { | |
| $this->cache[ $group ][ $key ] = 0; | |
| } | |
| if ( function_exists( 'apcu_inc' ) && ! isset( $this->non_persistent_groups[ $group ] ) ) { | |
| if ( ! apcu_exists( $this->prefix . ':' . $group . ':' . $key ) ) { | |
| return FALSE; | |
| } | |
| $this->cache[ $group ][ $key ] = apcu_inc( $this->prefix . ':' . $group . ':' . $key, $offset ); | |
| if ( $this->cache[ $group ][ $key ] < 0 ) { | |
| apcu_store( $this->prefix . ':' . $group . ':' . $key, 0 ); | |
| $this->cache[ $group ][ $key ] = 0; | |
| } | |
| } | |
| return $this->cache[ $group ][ $key ]; | |
| } | |
| /** | |
| * Replace the contents in the cache, if contents already exist | |
| * | |
| * @since WP 2.0.0 | |
| * @see WP_Object_Cache::set() | |
| * | |
| * @param int|string $key What to call the contents in the cache | |
| * @param mixed $data The contents to store in the cache | |
| * @param string $group Where to group the cache contents | |
| * @param int $expire When to expire the cache contents | |
| * @return bool False if not exists, true if contents were replaced | |
| */ | |
| public function replace( $key, $data, $group = 'default', $expire = 0 ) { | |
| if ( empty( $group ) ) { | |
| $group = 'default'; | |
| } | |
| $id = $key; | |
| if ( $this->multisite && ! isset( $this->global_groups[ $group ] ) ) { | |
| $id = $this->blog_prefix . $key; | |
| } | |
| if ( ! isset( $this->cache[ $group ][ $id ] ) ) { | |
| return FALSE; | |
| } | |
| return $this->set( $key, $data, $group, (int) $expire ); | |
| } | |
| /** | |
| * Reset keys | |
| * | |
| * @since WP 3.0.0 | |
| * @deprecated WP 3.5.0 | |
| */ | |
| public function reset() { | |
| _deprecated_function( __FUNCTION__, '3.5', 'switch_to_blog()' ); | |
| // Clear out non-global caches since the blog ID has changed. | |
| foreach ( array_keys( $this->cache ) as $group ) { | |
| if ( ! isset( $this->global_groups[ $group ] ) ) { | |
| unset( $this->cache[ $group ] ); | |
| } | |
| } | |
| if ( function_exists( 'apcu_cache_info' ) ) { | |
| $cache_info = apcu_cache_info(); | |
| if ( ! empty( $cache_info[ 'cache_list' ] ) ) { | |
| foreach( $cache_info[ 'cache_list' ] as $entry ) { | |
| list( $prefix, $group, $key ) = explode( ':', $entry[ 'info' ], 3 ); | |
| if ( $prefix == $this->prefix && ! isset( $this->global_groups[ $group ] ) ) { | |
| apcu_delete( $entry[ 'info' ] ); | |
| } | |
| } | |
| } | |
| } | |
| } | |
| /** | |
| * Sets the data contents into the cache | |
| * | |
| * The cache contents is grouped by the $group parameter followed by the | |
| * $key. This allows for duplicate ids in unique groups. Therefore, naming of | |
| * the group should be used with care and should follow normal function | |
| * naming guidelines outside of core WordPress usage. | |
| * | |
| * The $expire parameter is not used, because the cache will automatically | |
| * expire for each time a page is accessed and PHP finishes. The method is | |
| * more for cache plugins which use files. | |
| * | |
| * @since WP 2.0.0 | |
| * | |
| * @param int|string $key What to call the contents in the cache | |
| * @param mixed $data The contents to store in the cache | |
| * @param string $group Where to group the cache contents | |
| * @param int $expire Not Used | |
| * @return bool Always returns true | |
| */ | |
| public function set( $key, $data, $group = 'default', $expire = 0 ) { | |
| if ( empty( $group ) ) { | |
| $group = 'default'; | |
| } | |
| if ( $this->multisite && ! isset( $this->global_groups[ $group ] ) ) { | |
| $key = $this->blog_prefix . $key; | |
| } | |
| if ( is_object( $data ) ) { | |
| $data = clone $data; | |
| } | |
| $this->cache[ $group ][ $key ] = $data; | |
| if ( ! isset( $this->non_persistent_groups[ $group ] ) && function_exists( 'apcu_store' ) ) { | |
| return apcu_store( $this->prefix . ':' . $group . ':' . $key, $data, (int) $expire ); | |
| } | |
| return TRUE; | |
| } | |
| /** | |
| * Echoes the stats of the caching. | |
| * | |
| * Gives the cache hits, and cache misses. Also prints every cached group, | |
| * key and the data. | |
| * | |
| * @since WP 2.0.0 | |
| */ | |
| public function stats() { | |
| $non_persistent_groups = implode( ' ,', array_keys( $this->non_persistent_groups ) ); | |
| echo "<p>"; | |
| echo "<strong>Cache Hits:</strong> {$this->cache_hits}<br />"; | |
| echo "<strong>Cache Misses:</strong> {$this->cache_misses}<br />"; | |
| echo "<strong>APCu Cache Hits:</strong> {$this->apcu_cache_hits}<br />"; | |
| echo "<strong>APCu Cache Misses:</strong> {$this->apcu_cache_misses}<br />"; | |
| echo "<strong>Non persistent Groups:</strong> {$non_persistent_groups}<br />"; | |
| echo "</p>"; | |
| echo '<ul>'; | |
| foreach ( $this->cache as $group => $cache ) { | |
| echo "<li><strong>Group:</strong> $group - ( " . number_format( strlen( serialize( $cache ) ) / 1024, 2 ) . 'k )</li>'; | |
| } | |
| echo '</ul>'; | |
| } | |
| /** | |
| * Switch the interal blog id. | |
| * | |
| * This changes the blog id used to create keys in blog specific groups. | |
| * | |
| * @since WP 3.5.0 | |
| * | |
| * @param int $blog_id Blog ID | |
| */ | |
| public function switch_to_blog( $blog_id ) { | |
| $blog_id = (int) $blog_id; | |
| $this->blog_prefix = $this->multisite ? $blog_id . ':' : ''; | |
| } | |
| /** | |
| * Sets up object properties | |
| * | |
| * @since WP 2.0.8 | |
| */ | |
| public function __construct() { | |
| global $blog_id; | |
| $this->multisite = is_multisite(); | |
| $this->blog_prefix = $this->multisite ? $blog_id . ':' : ''; | |
| if ( defined( 'WP_APCU_CACHE_PREFIX' ) && WP_APCU_CACHE_PREFIX != '' ) { | |
| $this->prefix = WP_APCU_CACHE_PREFIX ; | |
| } else { | |
| $this->prefix = 'oc_' . trim( DB_NAME ); | |
| } | |
| } | |
| /** | |
| * Will save the object cache before object is completely destroyed. | |
| * | |
| * Called upon object destruction, which should be when PHP ends. | |
| * | |
| * @since WP 2.0.8 | |
| * | |
| * @return bool True value. Won't be used by PHP | |
| */ | |
| public function __destruct() { | |
| return true; | |
| } | |
| } |
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