javascript - 从 JavaScript 调用 PHP 网络服务

Question

我是 PHP 和 JavaScript 开发的新手，我正在尝试执行这段代码但失败了:

<?php
if(isset($_POST['username']) and isset($_POST['password'])) {

 // do logic for logining in (usually query your db)
if ($_POST['username'] == 'test' && $_POST['password'] == 'test') {
$data['success'] = true;
$data['message'] = 'Login succesful';
} else {
$data['success'] = false;
$data['message'] = 'Login failed';
}
// return json
echo json_encode($data);

}
?>

这是 JavaScript 文件:

<script>
    $(document).ready(function() {
    alert("dddd");
        $('#loginForm').submit(function() {
            $('#output').html('Connecting....');
            var postTo = 'http://localhost/Login/login.php';
            alert(postTo);
            $.post(postTo,{username: $('[name=username]').val() ,   password: $('[name=password]').val()} , 
                function(data) {
                
                    if(data.message) {
                        alert(data);
                    } else {
                        $('#output').html('Could not connect');
                    }
                
                },'json');
            
            return false;
        });
    });
</script>

请帮忙。

Answer 1

假设 $data 没有在任何地方定义，这应该可以修复它:

<?php
    $data = Array();
    if(isset($_POST['username']) and isset($_POST['password'])) {

         // do logic for logining in (usually query your db)
        if ($_POST['username'] == 'test' && $_POST['password'] == 'test') {
        $data['success'] = true;
        $data['message'] = 'Login succesful';
    } else {
        $data['success'] = false;
        $data['message'] = 'Login failed';
    }
    // return json
    echo json_encode($data);

    }
?>