1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 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.
* @param array $config name-value pairs that will be used to initialize the object properties
*/
public function __construct($fileName = null, $config = array())
{
$this->fileName = $fileName;
parent::__construct($config);
}
/**
* 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 @filemtime($this->fileName);
}
}