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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\HttpFoundation\Session\Storage;
use Symfony\Component\HttpFoundation\Session\SessionBagInterface;
/**
* StorageInterface.
*
* @author Fabien Potencier <fabien@symfony.com>
* @author Drak <drak@zikula.org>
*/
interface SessionStorageInterface
{
/**
* Starts the session.
*
* @return bool True if started
*
* @throws \RuntimeException if something goes wrong starting the session
*/
public function start();
/**
* Checks if the session is started.
*
* @return bool True if started, false otherwise
*/
public function isStarted();
/**
* Returns the session ID.
*
* @return string The session ID or empty
*/
public function getId();
/**
* Sets the session ID.
*
* @param string $id
*/
public function setId($id);
/**
* Returns the session name.
*
* @return mixed The session name
*/
public function getName();
/**
* Sets the session name.
*
* @param string $name
*/
public function setName($name);
/**
* Regenerates id that represents this storage.
*
* This method must invoke session_regenerate_id($destroy) unless
* this interface is used for a storage object designed for unit
* or functional testing where a real PHP session would interfere
* with testing.
*
* Note regenerate+destroy should not clear the session data in memory
* only delete the session data from persistent storage.
*
* Care: When regenerating the session ID no locking is involved in PHP's
* session design. See https://bugs.php.net/61470 for a discussion.
* So you must make sure the regenerated session is saved BEFORE sending the
* headers with the new ID. Symfony's HttpKernel offers a listener for this.
* See Symfony\Component\HttpKernel\EventListener\SaveSessionListener.
* Otherwise session data could get lost again for concurrent requests with the
* new ID. One result could be that you get logged out after just logging in.
*
* @param bool $destroy Destroy session when regenerating?
* @param int $lifetime Sets the cookie lifetime for the session cookie. A null value
* will leave the system settings unchanged, 0 sets the cookie
* to expire with browser session. Time is in seconds, and is
* not a Unix timestamp.
*
* @return bool True if session regenerated, false if error
*
* @throws \RuntimeException If an error occurs while regenerating this storage
*/
public function regenerate($destroy = false, $lifetime = null);
/**
* Force the session to be saved and closed.
*
* This method must invoke session_write_close() unless this interface is
* used for a storage object design for unit or functional testing where
* a real PHP session would interfere with testing, in which case
* it should actually persist the session data if required.
*
* @throws \RuntimeException if the session is saved without being started, or if the session
* is already closed
*/
public function save();
/**
* Clear all session data in memory.
*/
public function clear();
/**
* Gets a SessionBagInterface by name.
*
* @param string $name
*
* @return SessionBagInterface
*
* @throws \InvalidArgumentException If the bag does not exist
*/
public function getBag($name);
/**
* Registers a SessionBagInterface for use.
*/
public function registerBag(SessionBagInterface $bag);
/**
* @return MetadataBag
*/
public function getMetadataBag();
}