easy – 柯博文老師

<!DOCTYPE html>
<html lang="en">
<head>


    <!--
    <script src="httpsss://cdn.tiny.cloud/1/mott8ilewgbu1tryzfu9q7sdcmn5qfqt19jixbvaqgaz6kjc/tinymce/5/tinymce.min.js" referrerpolicy="origin"></script>
    -->
    <script src="httpsss://code.jquery.com/jquery-1.11.3.js"></script>

    <script type="text/javascript">
        $(document).ready(function() {
            $('#loginform').submit(function(e) {
                e.preventDefault();
                $.ajax({
                    type: "GET",
                    url: '02-AJAX_php資料回傳.php',
                    data: $(this).serialize(),
                    success: function(response)
                    {
                        console.log(response);


                        var jsonData = JSON.parse(response);
                        if (jsonData.success == true)
                        {
                            console.log(response);
                            alert(jsonData.username);
                        }
                        else
                        {
                            alert('Invalid Credentials!');
                        }
                    }
                });
            });
        });
    </script>



</head>
<body>

<form id="loginform" method="get">
    <div>
        Username:
        <input type="text" name="username" id="username" />
        Password:
        <input type="password" name="password" id="password" />
        <input type="submit" name="loginBtn" id="loginBtn" value="Login" />
    </div>
</form>
www.powenko.com
</body>
</html>

<?php
if (isset($_GET['username']) && $_GET['username'] && isset($_GET['password']) && $_GET['password']) {




    $username= isset($_GET['username']) ? $_GET['username'] : '';
    $password= isset($_GET['password']) ? $_GET['password'] : '';

    $array2=json_encode(array(
        "success" => true,
        "username" => $username,
        "password" => "xxxx",
        "id" => 20200822,
    ));
    echo  $array2;

} else {
    echo json_encode(array('success' => 0));
}

PHP