Ajax 删除请求返回 200 但会引发错误而不是成功

Question

您好，我无法弄清楚我在哪里出错了，因为删除功能运行良好，但是即使 JSON 响应返回成功，错误也会被触发。

$(document).on('click', '.remove-btn', function() {
    var id = $(this).data('id');
    var confirmDelete = confirm("Are you sure you want to remove this User");

    formData = {
        'form_process' : 'Remove User',
        'id' : id,
    }

    if (confirmDelete) {
        $.ajax({
            type    : 'POST', 
            url     : 'library/page/process/remove_user.php', 
            data    : formData, 
            dataType: 'json',
            beforeSend: function(){
                window.scrollTo(0, 0);
                $("#loading-overlay").show();
            },
            success : function(data) {
                $("#loading-overlay").hide();
                if (!data.success) { 
                    danger ('Process Error', data.errors) 
                } else {
                    success ('Success', 'User has been removed successfully.');

                    setTimeout(function() {
                        window.location.href = window.parent.CloseDialog();
                    }, 3000);
                }
            },
            error : function (xhr, ajaxOptions, thrownError) {
                $("#loading-overlay").hide();
                danger ('Process Error', "There is unknown error occurs. Please contact administrator for system verification") 
                console.log(xhr.status);
                console.log(xhr.responseText);
                console.log(thrownError);
                console.log('There is unknown error occurs. Please contact administrator for system verification');
            }
        });
    }
})

下面是remove_user.php代码

if($_POST['form_process'] == 'Remove User') {

    $training_info = $c_eta->_get_user_info($_POST['id']);

    if (count($training_info) > 0) {
        if ($c_eta->_remove_user($_POST['id'])) {
            $form_data['success'] = true;
        } else {
            $form_data['success'] = false;
            $form_data['errors'] = "Unable to remove user";
        }
        echo json_encode($form_data);
        return; 
    }
}

json 响应是

{"success":true}

用户已被删除，但我不断收到的消息是

"Process Error', "There is unknown error occurs. Please contact administrator for system verification"

。

我尝试按照此处其中一篇文章的建议在

header('Content-Type: application/json');

之前添加

echo json_encode($form_data);

，但它不起作用。

Answer 1

您应该发送带有所有必要标头的响应，尤其是响应代码。

if($_POST['form_process'] == 'Remove User') {

    $training_info = $c_eta->_get_user_info($_POST['id']);

    if (count($training_info) > 0) {
        if ($c_eta->_remove_user($_POST['id'])) {
            $form_data['success'] = true;
        } else {
            $form_data['success'] = false;
            $form_data['errors'] = "Unable to remove user";
        }


        header("HTTP/1.1 200 OK");
        header("Content-Type: application/json"); 

        // Optionally you may decide to add CORS support
        header('Access-Control-Allow-Origin: *');

        echo json_encode($form_data);
        return; 
    }
}