Yii2 Bootstrap 3
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<?php
/**
* FileDependency class file.
*
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008-2012 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\caching;
/**
* FileDependency represents a dependency based on a file's last modification time.
*
* If th last modification time of the file specified via [[fileName]] is changed,
* the dependency is considered as changed.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class FileDependency extends Dependency
{
/**
* @var string the name of the file whose last modification time is used to
* check if the dependency has been changed.
*/
public $fileName;
/**
* Constructor.
* @param string $fileName name of the file whose change is to be checked.
*/
public function __construct($fileName = null)
{
$this->fileName = $fileName;
}
/**
* Generates the data needed to determine if dependency has been changed.
* This method returns the file's last modification time.
* @return mixed the data needed to determine if dependency has been changed.
*/
protected function generateDependencyData()
{
return $this->fileName !== null ? @filemtime($this->fileName) : 0;
}
}