public function updatetopicAction()
 {
     global $mySession;
     $db = new Db();
     $topicId = $this->getRequest()->getParam('topicId');
     $this->view->topicId = $topicId;
     $this->view->pageHeading = "Edit Topic";
     if ($this->getRequest()->isPost()) {
         $request = $this->getRequest();
         $myform = new Form_Topic($topicId);
         if ($myform->isValid($request->getPost())) {
             $dataForm = $myform->getValues();
             $myObj = new Forums();
             $Result = $myObj->UpdateTopic($dataForm, $topicId);
             if ($Result == 1) {
                 $mySession->errorMsg = "Topic updated successfully.";
                 $this->_redirect('forum/index');
             } else {
                 $mySession->errorMsg = "Topic name you entered is already exists.";
                 $this->view->myform = $myform;
                 $this->render('edittopic');
             }
         } else {
             $this->view->myform = $myform;
             $this->render('edittopic');
         }
     } else {
         $this->_redirect('forum/edittopic/topicId/' . $topicId);
     }
 }