class SessionStorageApc
{
	/**
	* Constructor
	*
	* @access protected
	* @param array $options optional parameters
	*/
	function __construct()
	{
		session_set_save_handler(
			array($this, 'open'),
			array($this, 'close'),
			array($this, 'read'),
			array($this, 'write'),
			array($this, 'destroy'),
			array($this, 'gc')
		);
	}

	/**
	 * Open the SessionHandler backend.
	 *
	 * @access public
	 * @param string $save_path     The path to the session object.
	 * @param string $session_name  The name of the session.
	 * @return boolean  True on success, false otherwise.
	 */
	function open($save_path, $session_name)
	{
		return true;
	}

	/**
	 * Close the SessionHandler backend.
	 *
	 * @access public
	 * @return boolean  True on success, false otherwise.
	 */
	function close()
	{
		return true;
	}

 	/**
 	 * Read the data for a particular session identifier from the
 	 * SessionHandler backend.
 	 *
 	 * @access public
 	 * @param string $id  The session identifier.
 	 * @return string  The session data.
 	 */
	function read($id)
	{
		//$sess_id = 'sess_'.$id;
		return (string) apc_fetch('sess_'.$id);
	}

	/**
	 * Write session data to the SessionHandler backend.
	 *
	 * @access public
	 * @param string $id            The session identifier.
	 * @param string $session_data  The session data.
	 * @return boolean  True on success, false otherwise.
	 */
	function write($id, $session_data)
	{
		//$sess_id = 'sess_'.$id;
		return apc_store('sess_'.$id, $session_data, ini_get("session.gc_maxlifetime"));
	}

	/**
	  * Destroy the data for a particular session identifier in the
	  * SessionHandler backend.
	  *
	  * @access public
	  * @param string $id  The session identifier.
	  * @return boolean  True on success, false otherwise.
	  */
	function destroy($id)
	{
		//$sess_id = 'sess_'.$id;
		return apc_delete('sess_'.$id);
	}

	/**
	 * Garbage collect stale sessions from the SessionHandler backend.
	 *
	 * @access public
	 * @param integer $maxlifetime  The maximum age of a session.
	 * @return boolean  True on success, false otherwise.
	 */
	function gc($maxlifetime)
	{
		return true;
	}

}

joomla kütüphanesinden editlenmiştir. Kullanmak için php APC eklentisi kurulu olmalıdır.

kullanımı çok basittir

new SessionStorageApc;
session_start();