295 lines
9.3 KiB
PHP
295 lines
9.3 KiB
PHP
<?php
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/**
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* Object Cache API
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*
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* @link https://codex.wordpress.org/Class_Reference/WP_Object_Cache
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*
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* @package WordPress
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* @subpackage Cache
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*/
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/** WP_Object_Cache class */
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require_once ABSPATH . WPINC . '/class-wp-object-cache.php';
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/**
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* Adds data to the cache, if the cache key doesn't already exist.
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*
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* @since 2.0.0
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*
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* @see WP_Object_Cache::add()
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* @global WP_Object_Cache $wp_object_cache Object cache global instance.
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*
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* @param int|string $key The cache key to use for retrieval later.
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* @param mixed $data The data to add to the cache.
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* @param string $group Optional. The group to add the cache to. Enables the same key
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* to be used across groups. Default empty.
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* @param int $expire Optional. When the cache data should expire, in seconds.
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* Default 0 (no expiration).
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* @return bool True on success, false if cache key and group already exist.
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*/
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function wp_cache_add( $key, $data, $group = '', $expire = 0 ) {
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global $wp_object_cache;
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return $wp_object_cache->add( $key, $data, $group, (int) $expire );
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}
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/**
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* Closes the cache.
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*
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* This function has ceased to do anything since WordPress 2.5. The
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* functionality was removed along with the rest of the persistent cache.
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*
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* This does not mean that plugins can't implement this function when they need
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* to make sure that the cache is cleaned up after WordPress no longer needs it.
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*
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* @since 2.0.0
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*
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* @return true Always returns true.
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*/
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function wp_cache_close() {
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return true;
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}
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/**
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* Decrements numeric cache item's value.
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*
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* @since 3.3.0
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*
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* @see WP_Object_Cache::decr()
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* @global WP_Object_Cache $wp_object_cache Object cache global instance.
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*
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* @param int|string $key The cache key to decrement.
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* @param int $offset Optional. The amount by which to decrement the item's value. Default 1.
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* @param string $group Optional. The group the key is in. Default empty.
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* @return int|false The item's new value on success, false on failure.
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*/
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function wp_cache_decr( $key, $offset = 1, $group = '' ) {
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global $wp_object_cache;
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return $wp_object_cache->decr( $key, $offset, $group );
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}
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/**
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* Removes the cache contents matching key and group.
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*
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* @since 2.0.0
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*
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* @see WP_Object_Cache::delete()
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* @global WP_Object_Cache $wp_object_cache Object cache global instance.
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*
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* @param int|string $key What the contents in the cache are called.
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* @param string $group Optional. Where the cache contents are grouped. Default empty.
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* @return bool True on successful removal, false on failure.
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*/
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function wp_cache_delete( $key, $group = '' ) {
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global $wp_object_cache;
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return $wp_object_cache->delete( $key, $group );
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}
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/**
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* Removes all cache items.
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*
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* @since 2.0.0
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*
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* @see WP_Object_Cache::flush()
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* @global WP_Object_Cache $wp_object_cache Object cache global instance.
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*
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* @return bool True on success, false on failure.
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*/
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function wp_cache_flush() {
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global $wp_object_cache;
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return $wp_object_cache->flush();
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}
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/**
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* Retrieves the cache contents from the cache by key and group.
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*
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* @since 2.0.0
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*
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* @see WP_Object_Cache::get()
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* @global WP_Object_Cache $wp_object_cache Object cache global instance.
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*
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* @param int|string $key The key under which the cache contents are stored.
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* @param string $group Optional. Where the cache contents are grouped. Default empty.
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* @param bool $force Optional. Whether to force an update of the local cache
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* from the persistent cache. Default false.
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* @param bool $found Optional. Whether the key was found in the cache (passed by reference).
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* Disambiguates a return of false, a storable value. Default null.
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* @return mixed|false The cache contents on success, false on failure to retrieve contents.
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*/
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function wp_cache_get( $key, $group = '', $force = false, &$found = null ) {
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global $wp_object_cache;
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return $wp_object_cache->get( $key, $group, $force, $found );
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}
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/**
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* Retrieves multiple values from the cache in one call.
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*
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* @since 5.5.0
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*
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* @see WP_Object_Cache::get_multiple()
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* @global WP_Object_Cache $wp_object_cache Object cache global instance.
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*
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* @param array $keys Array of keys under which the cache contents are stored.
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* @param string $group Optional. Where the cache contents are grouped. Default empty.
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* @param bool $force Optional. Whether to force an update of the local cache
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* from the persistent cache. Default false.
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* @return array Array of values organized into groups.
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*/
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function wp_cache_get_multiple( $keys, $group = '', $force = false ) {
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global $wp_object_cache;
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return $wp_object_cache->get_multiple( $keys, $group, $force );
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}
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/**
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* Increment numeric cache item's value
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*
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* @since 3.3.0
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*
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* @see WP_Object_Cache::incr()
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* @global WP_Object_Cache $wp_object_cache Object cache global instance.
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*
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* @param int|string $key The key for the cache contents that should be incremented.
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* @param int $offset Optional. The amount by which to increment the item's value. Default 1.
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* @param string $group Optional. The group the key is in. Default empty.
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* @return int|false The item's new value on success, false on failure.
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*/
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function wp_cache_incr( $key, $offset = 1, $group = '' ) {
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global $wp_object_cache;
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return $wp_object_cache->incr( $key, $offset, $group );
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}
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/**
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* Sets up Object Cache Global and assigns it.
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*
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* @since 2.0.0
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*
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* @global WP_Object_Cache $wp_object_cache
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*/
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function wp_cache_init() {
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$GLOBALS['wp_object_cache'] = new WP_Object_Cache();
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}
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/**
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* Replaces the contents of the cache with new data.
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*
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* @since 2.0.0
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*
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* @see WP_Object_Cache::replace()
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* @global WP_Object_Cache $wp_object_cache Object cache global instance.
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*
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* @param int|string $key The key for the cache data that should be replaced.
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* @param mixed $data The new data to store in the cache.
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* @param string $group Optional. The group for the cache data that should be replaced.
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* Default empty.
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* @param int $expire Optional. When to expire the cache contents, in seconds.
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* Default 0 (no expiration).
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* @return bool False if original value does not exist, true if contents were replaced
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*/
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function wp_cache_replace( $key, $data, $group = '', $expire = 0 ) {
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global $wp_object_cache;
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return $wp_object_cache->replace( $key, $data, $group, (int) $expire );
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}
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/**
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* Saves the data to the cache.
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*
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* Differs from wp_cache_add() and wp_cache_replace() in that it will always write data.
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*
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* @since 2.0.0
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*
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* @see WP_Object_Cache::set()
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* @global WP_Object_Cache $wp_object_cache Object cache global instance.
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*
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* @param int|string $key The cache key to use for retrieval later.
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* @param mixed $data The contents to store in the cache.
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* @param string $group Optional. Where to group the cache contents. Enables the same key
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* to be used across groups. Default empty.
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* @param int $expire Optional. When to expire the cache contents, in seconds.
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* Default 0 (no expiration).
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* @return bool True on success, false on failure.
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*/
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function wp_cache_set( $key, $data, $group = '', $expire = 0 ) {
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global $wp_object_cache;
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return $wp_object_cache->set( $key, $data, $group, (int) $expire );
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}
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/**
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* Switches the internal blog ID.
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*
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* This changes the blog id used to create keys in blog specific groups.
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*
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* @since 3.5.0
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*
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* @see WP_Object_Cache::switch_to_blog()
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* @global WP_Object_Cache $wp_object_cache Object cache global instance.
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*
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* @param int $blog_id Site ID.
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*/
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function wp_cache_switch_to_blog( $blog_id ) {
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global $wp_object_cache;
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$wp_object_cache->switch_to_blog( $blog_id );
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}
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/**
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* Adds a group or set of groups to the list of global groups.
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*
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* @since 2.6.0
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*
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* @see WP_Object_Cache::add_global_groups()
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* @global WP_Object_Cache $wp_object_cache Object cache global instance.
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*
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* @param string|string[] $groups A group or an array of groups to add.
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*/
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function wp_cache_add_global_groups( $groups ) {
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global $wp_object_cache;
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$wp_object_cache->add_global_groups( $groups );
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}
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/**
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* Adds a group or set of groups to the list of non-persistent groups.
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*
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* @since 2.6.0
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*
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* @param string|string[] $groups A group or an array of groups to add.
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*/
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function wp_cache_add_non_persistent_groups( $groups ) {
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// Default cache doesn't persist so nothing to do here.
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}
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/**
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* Reset internal cache keys and structures.
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*
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* If the cache back end uses global blog or site IDs as part of its cache keys,
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* this function instructs the back end to reset those keys and perform any cleanup
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* since blog or site IDs have changed since cache init.
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*
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* This function is deprecated. Use wp_cache_switch_to_blog() instead of this
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* function when preparing the cache for a blog switch. For clearing the cache
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* during unit tests, consider using wp_cache_init(). wp_cache_init() is not
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* recommended outside of unit tests as the performance penalty for using it is
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* high.
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*
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* @since 2.6.0
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* @deprecated 3.5.0 WP_Object_Cache::reset()
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* @see WP_Object_Cache::reset()
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*
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* @global WP_Object_Cache $wp_object_cache Object cache global instance.
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*/
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function wp_cache_reset() {
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_deprecated_function( __FUNCTION__, '3.5.0', 'WP_Object_Cache::reset()' );
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global $wp_object_cache;
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$wp_object_cache->reset();
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}
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