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39 lines
1.1 KiB
PHP
39 lines
1.1 KiB
PHP
<?php
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/**
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* @link https://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license https://www.yiiframework.com/license/
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*/
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namespace yii\caching;
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/**
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* CallbackDependency represents a dependency based on the result of a callback function.
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*
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* Callback function should return a value that serves as the dependency data.
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*
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* For more details and usage information on Cache, see the [guide article on caching](guide:caching-overview).
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*
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* @author Vlad Varlamov <vlad@varlamov.dev>
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* @since 2.0.50
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*/
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class CallbackDependency extends Dependency
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{
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/**
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* @var callable the PHP callback that will be called to determine if the dependency has been changed.
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*/
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public $callback;
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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 result of the callback function.
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* @param CacheInterface $cache the cache component that is currently evaluating this dependency
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* @return mixed the data needed to determine if dependency has been changed.
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*/
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protected function generateDependencyData($cache)
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{
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return ($this->callback)();
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}
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}
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