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<?php
/**
* Abstract class that implements the temporary storage backend.
*
* Copyright 2012-2016 Horde LLC (http://www.horde.org/)
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.horde.org/licenses/lgpl21.
*
* @author Michael Slusarz <slusarz@horde.org>
* @category Horde
* @license http://www.horde.org/licenses/lgpl21 LGPL-2.1
* @package Data
*/
interface Horde_Data_Storage
{
/**
* Retrieve the data for a key.
*
* @param string $key Key.
*
* @return mixed Data value.
*/
public function get($key);
/**
* Set the data for a key.
*
* @param string $key Key.
* @param mixed $value Value. If null, clears the key value.
*/
public function set($key, $value = null);
/**
* Does the key exist?
*
* @param string $key Key.
*
* @return boolean Does the key exist?
*/
public function exists($key);
/**
* Clear all stored data.
*/
public function clear();
}
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