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<?php
/*
* This file is part of php-cache organization.
*
* (c) 2015 Aaron Scherer <aequasi@gmail.com>, Tobias Nyholm <tobias.nyholm@gmail.com>
*
* This source file is subject to the MIT license that is bundled
* with this source code in the file LICENSE.
*/
namespace Cache\TagInterop;
use Psr\Cache\CacheItemInterface;
use Psr\Cache\InvalidArgumentException;
/**
* An item that supports tags. This interface is a soon-to-be-PSR.
*
* @author Tobias Nyholm <tobias.nyholm@gmail.com>
* @author Nicolas Grekas <p@tchwork.com>
*/
interface TaggableCacheItemInterface extends CacheItemInterface
{
/**
* Get all existing tags. These are the tags the item has when the item is
* returned from the pool.
*
* @return array
*/
public function getPreviousTags();
/**
* Overwrite all tags with a new set of tags.
*
* @param string[] $tags An array of tags
*
* @throws InvalidArgumentException When a tag is not valid.
*
* @return TaggableCacheItemInterface
*/
public function setTags(array $tags);
}
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