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<?php
/*
* This file is part of the TYPO3 CMS project.
*
* It is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, either version 2
* of the License, or any later version.
*
* For the full copyright and license information, please read the
* LICENSE.txt file that was distributed with this source code.
*
* The TYPO3 project - inspiring people to share!
*/
namespace TYPO3\CMS\Core\Cache\Backend;
/**
* A caching backend which forgets everything immediately
*/
class NullBackend extends AbstractBackend implements PhpCapableBackendInterface, TaggableBackendInterface
{
/**
* Acts as if it would save data
*
* @param string $entryIdentifier ignored
* @param string $data ignored
* @param array $tags ignored
* @param int $lifetime ignored
*/
public function set($entryIdentifier, $data, array $tags = [], $lifetime = null) {}
/**
* Acts as if it would enable data compression
*
* @param bool $compression ignored
*/
public function setCompression($compression) {}
/**
* Returns False
*
* @param string $entryIdentifier ignored
* @return bool FALSE
*/
public function get($entryIdentifier)
{
return false;
}
/**
* Returns False
*
* @param string $entryIdentifier ignored
* @return bool FALSE
*/
public function has($entryIdentifier)
{
return false;
}
/**
* Does nothing
*
* @param string $entryIdentifier ignored
* @return bool FALSE
*/
public function remove($entryIdentifier)
{
return false;
}
/**
* Returns an empty array
*
* @param string $tag ignored
* @return array An empty array
*/
public function findIdentifiersByTag($tag)
{
return [];
}
/**
* Does nothing
*/
public function flush() {}
/**
* Does nothing
*
* @param string $tag ignored
*/
public function flushByTag($tag) {}
/**
* Does nothing
*/
public function collectGarbage() {}
/**
* Does nothing
*
* @param string $identifier An identifier which describes the cache entry to load
* @return bool
*/
public function requireOnce($identifier)
{
return false;
}
/**
* Does nothing
*
* @param string $identifier An identifier which describes the cache entry to load
* @return bool
*/
public function require(string $identifier)
{
return false;
}
}