public function getVendorInfo()
 {
     $vendorId = isset($_REQUEST['vendorId']) ? (int) $_REQUEST['vendorId'] : null;
     $res = array();
     if (!empty($vendorId)) {
         $model = new VendorModel();
         $res = $model->getVendorInfoById($vendorId);
     }
     echo json_encode($res);
 }