Jquery验证器与远程的怪异行为 [英] Jquery validator weird behaviour with remote

问题描述

我有一个使用jQuery验证器的注册表单：

I have a registration form which is using jQuery validator as:

$('reg_form').validate({
  ignore:"",
  rules : {
    user_name : {
      required :1,
      minlength :8,
      remote :"check_user_name.php"
    },
    password : {
      required :1,
      minlength :8,
    },
    firstname : {
      required :1,
    },
    lastname : {
      required :1,
    },
    email : {
      required :1,
    },
  }
});

它工作得很好，但问题很严重。它永远不会检测用户名是否已经在数据库中。

It worked pretty well but the problem is remote. It never detects if the username is already in the DB.

远程代码如下：

$uname = $_GET["user_name"];

$UserObj = new User();
echo $UserObj->checkUniqueUser($uname);

checkUniqueUser（）将检查是否存在具有相同名称的用户，否则将返回false，否则为true。

checkUniqueUser() will check if there is an user with the same name it will return false else true.

我从请求监视中获取了URL

I got the URL from the request watch

http://project.localhost/check_user_name.php?user_name=admin

我热链接了URL，它显示为false ，因为管理员已经存在于数据库中，如果我更改为其他内容它显示为真（当然它不在数据库中）

I hot linked the URL and it says false, since the admin is already there in the DB and if I change to something else it shows true (of course its not there in DB)

有人可以帮助我这个 ？希望我能够说清楚到目前为止我做了什么以及我面临的问题。

Can someone please help me on this ? Hope I was able to make it clear what I have done so far and what issue I am facing.

这是我在User类中的功能。

This is my function which I have in the User class.

public function checkUniqueUser($username){
      $return = true ;
      global $db ;
      $db->query("select iduser from user where 
      user_name = '".$this->cleanInput($username)."'");
      if($db->numRows() > 0 ){
        $return = false ;
      }
      return $return ;
}

推荐答案

因为你想要一个输出，你需要 echo true 或 false ，而不是返回。从技术上讲，返回无处可去。

Since you want an output, you need to echo true or false from your function, not return. Technically, there's nowhere to return.

参见 PHP 返回 和 PHP echo 。

public function checkUniqueUser($username){
      $return = true ;
      global $db ;
      $db->query("select iduser from user where 
      user_name = '".$this->cleanInput($username)."'");
      if($db->numRows() > 0 ){
        $return = false ;
      }
      echo $return ;  // echo (output) true or false
}

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