includes/cache/dependency/ConstantDependency.php

   1 <?php
   2 /**
   3  * Data caching with dependencies.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Cache
  22  */
  23
  24 /**
  25  * @ingroup Cache
  26  */
  27 class ConstantDependency extends CacheDependency {
  28         private $name;
  29         private $value;
  30
  31         function __construct( $name ) {
  32                 $this->name = $name;
  33                 $this->value = constant( $name );
  34         }
  35
  36         /**
  37          * @return bool
  38          */
  39         function isExpired() {
  40                 return constant( $this->name ) != $this->value;
  41         }
  42 }