重定向到关于ajax发布成功的另一页

Question

“我正在尝试修复此重定向，任何人都可以帮助我解决此代码的错误”

我希望ajax发布上的成功进入个人资料页面。由于某种原因，我一直做错了。知道该怎么做才能解决这个问题吗？

<?php
    session_start();
    include 'includes/config.php';

    $code = mysqli_real_escape_string($db,$_POST['code']);

    $results = mysqli_query($db,"SELECT * FROM students WHERE code='$code'");
    if (mysqli_num_rows($results) == 1 ) {
        $_SESSION['code'] = $code; 
        echo ('login');
    } 
    else {
        echo "not login";
    }  
?>

<?php include 'includes/nav.php';
    session_start();
?>
<script>
$(document).ready(function () {
    $('.forms').submit(function (e) {
        e.preventDefault();
        $.ajax({
            type: "POST",
            url: 'login.php',
            data: $(this).serialize(),
            success: function (data) {
                if (data === 'login') {
                    location.href = 'profile.php';
                }
                else {
                    alert(data);
                }
            }
        });
    });
});
</script>   
 
<form action="login.php" method="POST" class="forms">
<div class="form-group">
    <input name="code" type="text"  placeholder="enter your code">
    <button type="submit" name="studentSubmit" class="btn btn-dark">login</button>
  </div>
</form>