Requestオブジェクト他のコアオブジェクト

 class fooActions extends sfActions
 {
     public function executeIndex()
         $request    = $this->getContext()->getRequest();
         $response   = $this->getContext()->getResponse();
         $session    = $this->getContext()->getUser();
         $controller = $this->getContext()getController();
     }
 }

参考

http://www.symfony-project.org/api/1_4/sfContext