1: <?php
  2: /**
  3:  * CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
  4:  * Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
  5:  *
  6:  * Licensed under The MIT License
  7:  * For full copyright and license information, please see the LICENSE.txt
  8:  * Redistributions of files must retain the above copyright notice.
  9:  *
 10:  * @copyright     Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
 11:  * @link          https://cakephp.org CakePHP(tm) Project
 12:  * @since         3.0.0
 13:  * @license       https://opensource.org/licenses/mit-license.php MIT License
 14:  */
 15: namespace Cake\Cache\Engine;
 16: 
 17: use Cake\Cache\CacheEngine;
 18: 
 19: /**
 20:  * Null cache engine, all operations appear to work, but do nothing.
 21:  *
 22:  * This is used internally for when Cache::disable() has been called.
 23:  */
 24: class NullEngine extends CacheEngine
 25: {
 26: 
 27:     /**
 28:      * {@inheritDoc}
 29:      */
 30:     public function init(array $config = [])
 31:     {
 32:         return true;
 33:     }
 34: 
 35:     /**
 36:      * {@inheritDoc}
 37:      */
 38:     public function gc($expires = null)
 39:     {
 40:     }
 41: 
 42:     /**
 43:      * {@inheritDoc}
 44:      */
 45:     public function write($key, $value)
 46:     {
 47:         return true;
 48:     }
 49: 
 50:     /**
 51:      * {@inheritDoc}
 52:      */
 53:     public function read($key)
 54:     {
 55:         return false;
 56:     }
 57: 
 58:     /**
 59:      * {@inheritDoc}
 60:      */
 61:     public function readMany($keys)
 62:     {
 63:         return [];
 64:     }
 65: 
 66:     /**
 67:      * {@inheritDoc}
 68:      */
 69:     public function increment($key, $offset = 1)
 70:     {
 71:         return true;
 72:     }
 73: 
 74:     /**
 75:      * {@inheritDoc}
 76:      */
 77:     public function decrement($key, $offset = 1)
 78:     {
 79:         return true;
 80:     }
 81: 
 82:     /**
 83:      * {@inheritDoc}
 84:      */
 85:     public function delete($key)
 86:     {
 87:         return true;
 88:     }
 89: 
 90:     /**
 91:      * {@inheritDoc}
 92:      */
 93:     public function deleteMany($keys)
 94:     {
 95:         return [];
 96:     }
 97: 
 98:     /**
 99:      * {@inheritDoc}
100:      */
101:     public function clear($check)
102:     {
103:         return false;
104:     }
105: 
106:     /**
107:      * {@inheritDoc}
108:      */
109:     public function clearGroup($group)
110:     {
111:         return false;
112:     }
113: }
114: