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FileDependency.php
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FileDependency.php
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<?php
/**
* @license GPL-2.0-or-later
* @file
*/
use Wikimedia\AtEase\AtEase;
/**
* Depend on a file.
*
* @newable
* @ingroup Language
*/
class FileDependency extends CacheDependency {
/** @var string */
private $filename;
/** @var null|false|int */
private $timestamp;
/**
* Create a file dependency
*
* @stable to call
*
* @param string $filename The name of the file, preferably fully qualified
* @param null|false|int $timestamp The unix last modified timestamp, or false if the
* file does not exist. If omitted, the timestamp will be loaded from
* the file.
*
* A dependency on a nonexistent file will be triggered when the file is
* created. A dependency on an existing file will be triggered when the
* file is changed.
*/
public function __construct( $filename, $timestamp = null ) {
$this->filename = $filename;
$this->timestamp = $timestamp;
}
/**
* @return array
*/
public function __sleep() {
$this->loadDependencyValues();
return [ 'filename', 'timestamp' ];
}
public function loadDependencyValues() {
if ( $this->timestamp === null ) {
AtEase::suppressWarnings();
# Dependency on a non-existent file stores "false"
# This is a valid concept!
$this->timestamp = filemtime( $this->filename );
AtEase::restoreWarnings();
}
}
/** @inheritDoc */
public function isExpired() {
AtEase::suppressWarnings();
$lastmod = filemtime( $this->filename );
AtEase::restoreWarnings();
if ( $lastmod === false ) {
if ( $this->timestamp === false ) {
# Still nonexistent
return false;
}
# Deleted
wfDebug( "Dependency triggered: {$this->filename} deleted." );
return true;
}
if ( $lastmod > $this->timestamp ) {
# Modified or created
wfDebug( "Dependency triggered: {$this->filename} changed." );
return true;
}
# Not modified
return false;
}
}

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text/x-php
Expires
Aug 21 2026, 05:46 (12 w, 12 h ago)
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a8/6f/75c0b0489422114e15b9e79a1c5a
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FileDependency.php (1 KB)

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