function check_login() 
    { 
    global $auth, $h, $tpl; 
        // Redirect already logged in users to their userpage 
        if ($auth->isUser()) { 
               $referer = $_SERVER['HTTP_REFERER']; 
                $this->_redirect('/admin/test/'); 
        } 
 
        // Per default redirect user to her profile page 
        $url = isset($_GET['url']) ? $_GET['url'] : ''; 
        if ($this->loginform->validate()) { 
            // Try to login user 
          
            $v = $this->loginform->exportValues(); 
            $username = ($v['username']); 
            if ($auth->login($v['username'], 
                             $v['password'], 
                             $this->loginform->getElementValue('remember')) 
                ) { 
               
                $this->_append_message('Login erfolgreich.'); 
                $referer = $_SERVER['HTTP_REFERER']; 
                //$admin = '/admin/test/'; 
                $admin_url = $referer; 
                $this->_redirect('/admin/test/');oder  
                $this->_redirect('http://www.google.de') keine weiterleitung 
            }else{ 
                $this->_append_message('Hoppla! Die Kombination aus Passwort und Username passt nicht. Was vergessen?'); 
                $tpl->display('login_fehler.tpl'); 
            } 
        } 
    } 

function _redirect($url=null, $status=302) 
    { 
        require_once 'HTTP/Header.php'; 
        print_r($url); 
         
        if (!$url) $url = $_SERVER["REQUEST_URI"]; 
         
       // print_r($url); 
        $hh = new HTTP_Header(); 
        $hh->sendStatusCode($status); 
        $hh->redirect("www.google.de"); 
    }