PHP5'ta, kod: session_register("");

benim kod:

function login() {
        // Don't show the error message if no data has been submitted.  
        $this->set('error', false);

        // Production mode. No output. For AJAX
        Configure::write('debug', 0);

        // Does not render the view
        // Others method : $this->render(false, false);
        $this->autoRender = false;

        // The most important : set : debug = 0 and register session
        session_register("");

            $this->Session->write('test',"test1");

                echo $this->Session->read('test');
        }
        return ;
    }