private function gcPersistent()
    {
        return (bool) $this->app['database']->getDefault()
            ->delete('PersistentSessions')
            ->where('created_at', U::unixToDb(time() - PersistentSession::$sessionLength), '<')
            ->execute();
    }
private function gcPersistent()
    {
        return (bool) $this->app['database']->getDefault()
            ->delete('PersistentSessions')
            ->where('created_at', U::unixToDb(time() - PersistentSession::$sessionLength), '<')
            ->execute();
    }
private function gcPersistent ( ) { return ( bool ) $ this -> app [ 'database' ] -> getDefault ( ) -> delete ( 'PersistentSessions' ) -> where ( 'created_at' , U :: unixToDb ( time ( ) - PersistentSession :: $ sessionLength ) , '<' ) -> execute ( ) ; }
Clears out expired persistent sessions.

@return bool
Clears out expired persistent sessions .