/application/modules/mybase/controllers/AuthController.php

<?php

class Mybase_AuthController extends Unodor_Controller_Action
{
   protected $_flashMessenger;
   protected $_form;

   public function init()
   {
      $this->_redirector = $this->_helper->getHelper('Redirector');
   }

   public function loginAction()
   {
      $this->_form = new Mybase_Form_Login();

      if(!$this->getRequest()->isPost()){
         $this->view->form = $this->_form;
      }else{
         $form = $this->_form;
         if(!$form->isValid($_POST)){
            $this->view->form = $form;
            $this->_flash('Všechna pole musí být vyplněna', 'error', false);
         }else{
            $values = $form->getValues();
            $auth = Zend_Auth::getInstance();
            $authAdapter = new Zend_Auth_Adapter_DbTable(
                            Zend_Db_Table_Abstract::getDefaultAdapter(),
                            'user_login',
                            'username',
                            'password',
                            'MD5(?)'
            );
            $modelAccount = new Model_Account();
            $idaccount = $modelAccount->getId($this->_request->account);

            $select = $authAdapter->getDbSelect();
            $select->where('idaccount = ' . $idaccount);

            $authAdapter->setIdentity($values['username']);
            $authAdapter->setCredential($values['password']);
            $result = $auth->authenticate($authAdapter);

            switch($result->getCode()){

               case Zend_Auth_Result::FAILURE_IDENTITY_NOT_FOUND:
                  $this->view->form = $form;
                  $this->_flash('Špatné uživatelské jméno', 'error', false);
                  break;

               case Zend_Auth_Result::FAILURE_CREDENTIAL_INVALID:
                  $this->view->form = $form;
                  $this->_flash('Špatné heslo', 'error', false);
                  break;

               case Zend_Auth_Result::SUCCESS:
                  $storage = $auth->getStorage();
                  $storage->write($authAdapter->getResultRowObject(array('email', 'name', 'surname', 'username', 'iduser', 'owner', 'administrator')));
                  if($form->getValue('remember') == 1)
                     Zend_Session::rememberMe(60 * 60 * 24 * 14);
                  //$this->_redirect('http://'.$_SERVER['SERVER_NAME'].$_SERVER['REQUEST_URI']);
                  $this->_redirect('/');
                  break;

               case Zend_Auth_Result::FAILURE:
                  $this->view->form = $form;
                  $this->_flash('Neznámá chyba (FAILURE)', 'error', false);
                  break;

               case Zend_Auth_Result::FAILURE_IDENTITY_AMBIGUOUS:
                  $this->view->form = $form;
                  $this->_flash('"Nejednoznačné"', 'error', false);
                  break;

               case Zend_Auth_Result::FAILURE_UNCATEGORIZED:
                  $this->view->form = $form;
                  $this->_flash('Neznámá chyba(FAILURE_UNCATEGORIZED)', 'error', false);
                  break;

               default:
                  $this->view->form = $form;
                  $this->_flash('Neznámá chyba (default)', 'error', false);
                  break;
            }
         }
      }
      $this->_helper->layout->disableLayout();
   }

   public function logoutAction()
   {
      Zend_Auth::getInstance()->clearIdentity();
      return $this->_redirect('index');
   }
}