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 */ 27class GlobalDependency extends CacheDependency { 28 private $name; 29 private $value; 30 31 public function __construct( $name ) { 32 $this->name = $name; 33 $this->value = $GLOBALS[$name]; 34 } 35 36 /** 37 * @return bool 38 */ 39 public function isExpired() { 40 if ( !isset( $GLOBALS[$this->name] ) ) { 41 return true; 42 } 43 44 return $GLOBALS[$this->name] != $this->value; 45 } 46} 47