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<?php |
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/** |
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* This file is part of mundschenk-at/wp-data-storage. |
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* |
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* Copyright 2017-2018 Peter Putzer. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation; either version 2 |
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* of the License, or ( at your option ) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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* |
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* @package mundschenk-at/wp-data-storage/tests |
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* @license http://www.gnu.org/licenses/gpl-2.0.html |
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*/ |
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namespace Mundschenk\Data_Storage; |
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/** |
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* Implements an inteface to the WordPress Object Cache. |
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* |
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* @since 1.0.0 |
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* |
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* @author Peter Putzer <[email protected]> |
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*/ |
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class Cache extends Abstract_Cache { |
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/** |
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* The incrementor cache key. |
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* |
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* @var string |
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*/ |
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private $incrementor_key; |
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/** |
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* The cache group. |
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* |
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* @var string |
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*/ |
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private $group; |
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/** |
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* Create new cache instance. |
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* |
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* @param string $prefix The prefix automatically added to cache keys. |
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* @param string|null $group Optional. The cache group. Defaults to $prefix. |
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*/ |
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public function __construct( $prefix, $group = null ) { |
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$this->group = ! isset( $group ) ? $prefix : $group; |
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$this->incrementor_key = "{$prefix}cache_incrementor"; |
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$this->incrementor = (int) \wp_cache_get( $this->incrementor_key, $this->group ); |
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parent::__construct( $prefix ); |
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} |
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/** |
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* Invalidate all cached elements by reseting the incrementor. |
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*/ |
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public function invalidate() { |
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$this->incrementor = time(); |
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\wp_cache_set( $this->incrementor_key, $this->incrementor, $this->group, 0 ); |
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} |
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/** |
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* Retrieves a cached value. |
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* |
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* @param string $key The cache key. |
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* @param bool|null $found Optional. Whether the key was found in the cache. Disambiguates a return of false as a storable value. Passed by reference. Default null. |
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* |
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* @return mixed |
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*/ |
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public function get( $key, &$found = null ) { |
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return \wp_cache_get( $this->get_key( $key ), $this->group, false, $found ); |
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} |
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/** |
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* Sets an entry in the cache and stores the key. |
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* |
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* @param string $key The cache key. |
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* @param mixed $value The value to store. |
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* @param int $duration Optional. The duration in seconds. Default 0 (no expiration). |
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* |
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* @return bool True if the cache could be set successfully. |
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*/ |
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public function set( $key, $value, $duration = 0 ) { |
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return \wp_cache_set( $this->get_key( $key ), $value, $this->group, $duration ); |
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} |
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/** |
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* Deletes an entry from the cache. |
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* |
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* @param string $key The cache key root. |
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* |
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* @return bool True on successful removal, false on failure. |
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*/ |
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public function delete( $key ) { |
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return \wp_cache_delete( $this->get_key( $key ), $this->group ); |
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} |
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} |
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mundschenk-at /
wp-data-storage
