public function Gz_nameValidate()
 {
     $gz_name = Input::get('gz_name');
     $ZwController = new ZwController();
     $jsonData = $ZwController->getZwByGz_name($gz_name);
     $arr = json_decode($jsonData, true);
     //return $jsonData;
     if ($arr['result']) {
         return 'false';
     } else {
         return 'true';
     }
 }