/**
* The garbage collector, this is executed when the session garbage collector
* is executed and takes the max session lifetime as its only parameter.
*
* @param int $sess_maxlifetime Maximum session lifetime.
*
* @return void
* @access public
*/
public static function gc($sess_maxlifetime)
{
$s = new Session();
$s->whereAdd('"last_used" + ' . $s->escape($sess_maxlifetime) . ' < ' . time());
$s->delete(true);
}
