bug

@@ -114,6 +114,7 @@ class User extends Backend
             }else{
                 $params['teach_phone'] = null;
             }
+            $params['avatar'] = substr($params['avatar'],82,21);
             $result = $row->allowField(true)->save($params);
             Db::commit();
         } catch (ValidateException|PDOException|Exception $e) {