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47 lines
1.2 KiB
47 lines
1.2 KiB
<?php |
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/** |
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* FileDependency class file. |
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* |
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* @link http://www.yiiframework.com/ |
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* @copyright Copyright © 2008-2012 Yii Software LLC |
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* @license http://www.yiiframework.com/license/ |
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*/ |
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namespace yii\caching; |
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/** |
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* FileDependency represents a dependency based on a file's last modification time. |
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* |
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* If th last modification time of the file specified via [[fileName]] is changed, |
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* the dependency is considered as changed. |
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* |
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* @author Qiang Xue <qiang.xue@gmail.com> |
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* @since 2.0 |
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*/ |
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class FileDependency extends Dependency |
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{ |
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/** |
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* @var string the name of the file whose last modification time is used to |
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* check if the dependency has been changed. |
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*/ |
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public $fileName; |
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/** |
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* Constructor. |
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* @param string $fileName name of the file whose change is to be checked. |
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*/ |
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public function __construct($fileName = null) |
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{ |
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$this->fileName = $fileName; |
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} |
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/** |
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* Generates the data needed to determine if dependency has been changed. |
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* This method returns the file's last modification time. |
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* @return mixed the data needed to determine if dependency has been changed. |
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*/ |
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protected function generateDependencyData() |
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{ |
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return $this->fileName !== null ? @filemtime($this->fileName) : 0; |
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} |
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}
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