MySQL查询工作，但不是在服务器

Question

我在PHP安装主登录系统，它可以完美运行在XAMMP但在服务器它注册页面给出错误：

“有误，请重试！”

if(($db->query("INSERT INTO `".MLS_PREFIX."users` SET ?u", $user_data)) && ($id = $db->insertId()) && ($db->query("INSERT INTO `".MLS_PREFIX."privacy` SET `userid` = ?i", $id)) && ($db->query("INSERT INTO `".MLS_PREFIX."privacy1` SET `chart` = '1', `vip` = '1', `userid` = ?i", $id))) { 
     $page->success = 1; 
     $_SESSION['user'] = $id; 
     $user = new User($db); 
    } else 
     $page->error = "There was an error ! Please try again !"; 

Answer 1

唐不包括在backtics点;正确的语法是：

`dbname`.`tablename`