public function listaAction()
 {
     if ($this->getRequest()->isPost()) {
         if ($this->getRequest()->getPost('search')) {
             $Utenti = App_Model_User::searchUser($this->getRequest()->getPost('search'));
             $this->view->clearVars();
             file_put_contents(PUBLIC_PATH . '/log.log', print_r($Utenti, true));
             $this->view->utenti = array();
             foreach ($Utenti as $Utente) {
                 $this->view->utenti[] = array($Utente->IDUser, (string) $Utente, null, (string) $Utente);
             }
             echo json_encode($this->view->utenti);
             exit;
         }
     }
 }