Yaf_Response_Abstract::setRedirect

<?php
class AccountController extends Yaf_Controller_Abstract
{
    public function indexAction()
    {
        if (!Yaf_Session::getInstance()->has("login")) {
            /* send a Location header pointing to the login page */
            $this->getResponse()->setRedirect("/account/login");
            return false; // nothing to render here
        }
    }
}
?>