weixin_33698043 2015-06-10 11:59 采纳率: 0%
浏览 19

Ajax / PHP登录没有反应

I have received a partially built website and was asked to implement a login system for clients and admins. I am quite new to JS and AJAX and I am having a hard time understanding what the other person has implemented and how I can get it to function properly.

This is the login form where the user can enter in the credientials.

<form name="ajaxform" id="ajaxform" action="auth/ajax-auth.php" method="POST" >
    <h4>Client Login</h4>
        <div id="error"></div>
            <label for="username" class="col-sm-2 control-label">Username</label>
            <input id="username" class="form-control" name='username' placeholder="Username">
            <label for="password" class="col-sm-2 control-label">Password</label>
            <input type="password" class="form-control" id="password" name='password' placeholder="Password">
        <div class="modal-footer">
            <button type="button">Close</button>
            <button type="submit" id="loginbtn">Login</button>

Once the form gets submitted it will run ajax-auth.php and also will run an Ajax function. It should then redirect the user who is logging in to either the client side or admin side dependant on their permission level.

The Ajax function looks like this:

var username=$("#username").val();
var password=$("#password").val();
var dataString = 'username='+username+'&password='+password;
if($.trim(username).length>0 && $.trim(password).length>0) {
        type: "POST",
        url: "auth/ajax-auth.php",
        data: dataString,
        cache: false,
        beforeSend: function(){ $("#loginbtn").val('Connecting...');},
        success: function(data){
            if(data) {
                alert(data + " Logged in!");

               if(data == "admin"){
                   window.location.href = "/admin/admin.php";
               else if(data == "client"){

                //uncomment when client_home.php page is ready
                //window.location.href = "client_home.php";

                //for now just redirect to homepage
                window.location.href = "index.html";

            } else {
                $("#error").html("<span style='color:#cc0000'>Error:</span> Invalid username and password. ");

And here is my PHP:


ini_set('display_errors', 1);          

$username = $_POST['username'];
$password = $_POST['password'];

include '../connection.php';
$dbc = mysqli_connect(DB_HOST, DB_USER, DB_PASSWORD, DB_NAME);

$sql = "SELECT * FROM users WHERE username='$username' AND password='$password'";

$result = mysqli_query($dbc, $sql);

    if (mysqli_num_rows($result) == true)
        $_SESSION["username"] = $username;

        $row = mysqli_fetch_array($result);
        if ($row["permission"] == 2)
         $_SESSION["permission"] = 2;
         //Redirect to the admin login page.
         header("Location: ../admin/admin.php");
        else if ($row["permission"] == 1)
        $_SESSION["permission"] = 1;
        $_SESSION["userId"] = $row["user_id"];
        $_SESSION["account"] = $row["account_id"];
        //redirect to the client home page.
        header("Location: ../index.html");   //Change this when ready, for now go to homepage
        echo "User not found!";
        header("Location: ../index.html");

When I enter in a username and password (wrong or right) nothing is happening. If the credentials are wrong my error message should be hitting, and if I am logging in as admin I should be redirected to the admin page, and same with for the client being redirected to the client page.

How/Where am I going wrong here?

The console is not throwing me any errors and even my error message for invalid login creds is not being displayed.

I know I am close, any help is greatly appreciated.

  • 写回答

3条回答 默认 最新

  • weixin_33688840 2015-06-10 12:01

    You've to give some output in your PHP, because now you're redirecting the request. This won't work for an AJAX request.

    For example:

        if ($row["permission"] == 2)
          $_SESSION["permission"] = 2;
          // Redirect to the admin login page.
          echo 'admin';
        else if ($row["permission"] == 1)
           $_SESSION["permission"] = 1;
           $_SESSION["userId"] = $row["user_id"];
           $_SESSION["account"] = $row["account_id"];
           echo 'client';



  • ¥15 如何删除这个虚拟音频
  • ¥50 hyper默认的default switch
  • ¥15 网站打不开,提示502 Bad Gateway
  • ¥20 基于MATLAB的绝热压缩空气储能系统代码咨询
  • ¥15 R语言建立随机森林模型出现的问题
  • ¥20 unity内置语言切换的按钮设置
  • ¥15 中级微观经济学,生产可能性边界问题
  • ¥15 TCP传输时不同网卡传输用时差异过大
  • ¥15 请各位看看我写的属于什么算法,或者有更正确的写法?
  • ¥15 html5 qrcode 扫描器