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:      * {@inheritDoc}
 28:      */
 29:     public function init(array $config = [])
 30:     {
 31:         return true;
 32:     }
 33: 
 34:     /**
 35:      * {@inheritDoc}
 36:      */
 37:     public function gc($expires = null)
 38:     {
 39:     }
 40: 
 41:     /**
 42:      * {@inheritDoc}
 43:      */
 44:     public function write($key, $value)
 45:     {
 46:         return true;
 47:     }
 48: 
 49:     /**
 50:      * {@inheritDoc}
 51:      */
 52:     public function read($key)
 53:     {
 54:         return false;
 55:     }
 56: 
 57:     /**
 58:      * {@inheritDoc}
 59:      */
 60:     public function readMany($keys)
 61:     {
 62:         return [];
 63:     }
 64: 
 65:     /**
 66:      * {@inheritDoc}
 67:      */
 68:     public function increment($key, $offset = 1)
 69:     {
 70:         return true;
 71:     }
 72: 
 73:     /**
 74:      * {@inheritDoc}
 75:      */
 76:     public function decrement($key, $offset = 1)
 77:     {
 78:         return true;
 79:     }
 80: 
 81:     /**
 82:      * {@inheritDoc}
 83:      */
 84:     public function delete($key)
 85:     {
 86:         return true;
 87:     }
 88: 
 89:     /**
 90:      * {@inheritDoc}
 91:      */
 92:     public function deleteMany($keys)
 93:     {
 94:         return [];
 95:     }
 96: 
 97:     /**
 98:      * {@inheritDoc}
 99:      */
100:     public function clear($check)
101:     {
102:         return false;
103:     }
104: 
105:     /**
106:      * {@inheritDoc}
107:      */
108:     public function clearGroup($group)
109:     {
110:         return false;
111:     }
112: }
113: