Zend FR

$frontController->registerPlugin(new MyPlugin());

function chapitreAction()
        {        
            $user = Zend_Auth::getInstance()->getIdentity();        
            if ((isset($user)) && ($user->real_name == "admin"))
            {
            $this->view->Titre = "chapitre admin";
            $chapitres = new tablechapitre();
            $this->view->chapitres = $chapitres->fetchAll(); 
            }  
            else
            {
            $this->_redirect('/admin/index/connection/');    
            }
        }

<?php
class Admin_loginController extends Zend_Controller_Action
{
    function loginAction()
    {             
        $this->view->Titre = "login form...";
        $this -> _helper -> viewRenderer -> setResponseSegment( 'login' );
        $idChapitreGet = (int)$this->_request->getParam('num', 0);
        $idpageDefault = (int)$this->_request->getParam('idpage', 0);

        if ($this->_request->isPost()) {
            
            $formData = $this->_request->getPost();        
            $f = new Zend_Filter_StripTags();
            $username = $f->filter($this->_request->getPost('login'));
            $password = $f->filter($this->_request->getPost('pass'));
            
            if (empty($username)) {
                $this->view->message = 'Please provide a username.';
                
            } else {
                // setup Zend_Auth adapter for a database table
                $config = new Zend_Config_Ini('./application/config/config.ini', 'maconfig');        
    
                // Zend Objet Base de données
  
                 $dbAdapter = new Zend_Db_Adapter_Pdo_Mysql(array(
                'host'     => $config->db->params->host,
                'username' => $config->db->params->username,
                'password' => $config->db->params->password,
                'dbname'   => $config->db->params->dbname
                ));
            
                
                $authAdapter = new Zend_Auth_Adapter_DbTable($dbAdapter);
                $authAdapter->setTableName('users');
                $authAdapter->setIdentityColumn('username');
                $authAdapter->setCredentialColumn('password');            
                // Set the input credential values to authenticate against
                $authAdapter->setIdentity($username);
                $authAdapter->setCredential($password);
                // do the authentication
                $auth = Zend_Auth::getInstance();
                $result = $auth->authenticate($authAdapter);
                
                if ($result->isValid()) {
                // success: store database row to auth's storage
                // system. (Not the password though!)
                $data = $authAdapter->getResultRowObject(null, 'password');
                $auth->getStorage()->write($data);
                $this->view->message = "ok";
                $this->_redirect('/admin');
                } else {
                // failure: clear database row from session
                $this->view->message = 'Login failed.';
                }    
            }    
        }
    
        $auth = Zend_Auth::getInstance();
        if (!$auth->hasIdentity()) {
        $form = new Formlogin();        
        $this->view->form = $this->getForm();
        }
    
    
    }
    
    function logoutAction()
    {
    Zend_Auth::getInstance()->clearIdentity();
    $this->_redirect('/admin/index/connection');
    }
    
    public function getForm()
    {
        return new FormLogin(array(
            'action' => "",
            'method' => 'post',
        ));
    }
    
    function preDispatch()
        {
            $auth = Zend_Auth::getInstance();
            if (!$auth->hasIdentity()) {
            //$this->_redirect('/site');
            }
        }
    
   
}