name : WPCacheEngine.php <?php namespace Automattic\WooCommerce\Caching; /** * Implementation of CacheEngine that uses the built-in WordPress cache. */ class WPCacheEngine implements CacheEngine { use CacheNameSpaceTrait; /** * Retrieves an object cached under a given key. * * @param string $key They key under which the object to retrieve is cached. * @param string $group The group under which the object is cached. * * @return array|object|null The cached object, or null if there's no object cached under the passed key. */ public function get_cached_object( string $key, string $group = '' ) { $prefixed_key = self::get_prefixed_key( $key, $group ); $value = wp_cache_get( $prefixed_key, $group ); return false === $value ? null : $value; } /** * Caches an object under a given key, and with a given expiration. * * @param string $key The key under which the object will be cached. * @param array|object $object The object to cache. * @param int $expiration Expiration for the cached object, in seconds. * @param string $group The group under which the object will be cached. * * @return bool True if the object is cached successfully, false otherwise. */ public function cache_object( string $key, $object, int $expiration, string $group = '' ): bool { $prefixed_key = self::get_prefixed_key( $key, $group ); return false !== wp_cache_set( $prefixed_key, $object, $group, $expiration ); } /** * Removes a cached object from the cache. * * @param string $key They key under which the object is cached. * @param string $group The group under which the object is cached. * * @return bool True if the object is removed from the cache successfully, false otherwise (because the object wasn't cached or for other reason). */ public function delete_cached_object( string $key, string $group = '' ): bool { $prefixed_key = self::get_prefixed_key( $key, $group ); return false !== wp_cache_delete( $prefixed_key, $group ); } /** * Checks if an object is cached under a given key. * * @param string $key The key to verify. * @param string $group The group under which the object is cached. * * @return bool True if there's an object cached under the given key, false otherwise. */ public function is_cached( string $key, string $group = '' ): bool { $prefixed_key = self::get_prefixed_key( $key, $group ); return false !== wp_cache_get( $prefixed_key, $group ); } /** * Deletes all cached objects under a given group. * * @param string $group The group to delete. * * @return bool True if the group is deleted successfully, false otherwise. */ public function delete_cache_group( string $group = '' ): bool { return false !== self::invalidate_cache_group( $group ); } }