Forms

<?php

class Application_Form_Login extends Zend_Form
{

    public function init()
    {
        $this->addElement('text', 'username', array (
            'Label' => 'Username',
            'Required' => true,
            'Filters' => array (),
            'Validator' => array (),
        ));
        $this->addElement('password', 'password', array (
            'Label' => 'Password',
            'Required' => true,
            'Filters' => array (),
            'Validators' => array (),
        ));
        $this->addElement('submit', 'login', array (
            'Label' => 'Login',
            'Ignore' => true,
        ));
        $this->addElement('hash', 'token');
    }


}


class AuthController extends Zend_Controller_Action
{

    protected $_session;

    public function init()
    {
        $this->_session = new Zend_Session_Namespace('App_Auth');
    }

    public function indexAction()
    {
        $form = new Application_Form_Login(array (
            'action' => $this->view->url(array ('controller' => 'auth', 'action' => 'login'), null, true),
            'method' => 'post',
        ));
        if (isset ($this->_session->username)) {
            $form->getElement('username')->setValue($this->_session->username);
            unset ($this->_session->username);
        }
        $this->view->form = $form;
    }

    public function loginAction()
    {
        $username = $this->getRequest()->getParam('username', null);
        $password = $this->getRequest()->getParam('password', null);

        $bootstrap = $this->getInvokeArg('bootstrap');
        $db = $bootstrap->getResource('db');

        $auth = new Application_Model_Auth($db);
        $result = $auth->validate($username, $password);
        if (!$result) {
            $this->_session->username = $username;
            return $this->_helper->redirector('index');
        } else {
            return $this->_helper->redirector('index', 'index');
        }

    }

    public function logoutAction()
    {
        if (Zend_Auth::getInstance()->hasIdentity()) {
            Zend_Auth::getInstance()->clearIdentity();
        }
        return $this->_helper->redirector('index', 'index');
    }


}