php – 使用$.ajax从json_encode接收响应时获取parseerror

我正在尝试使用$.ajax via尝试一个非常简单的请求并获得响应. JSON.我已经尝试过从PHP文件中返回一个简单的文本短语.
我的js部分代码就是这样调用beemailer.PHP来获得响应.

$.ajax({
        type: 'POST',
        dataType: "json",
        contentType: "application/json; charset=utf-8",
        url: 'beemailer.PHP',
        data: {
            'name': data_name,
            'email': data_email,
            'message': data_message,
            'subject': data_subject
        },
        success: function (data) {
            var output = jQuery.parseJSON(data);
            console.log(output);
            alert(output);
        },
        error: function (error, x, y) {
            console.log(error);
            alert(x, y);

        }
        )
};

而beemailer.PHP是这样的：

<?PHP
    $to = "[e-mail]";
    $subject = $_POST['subject'];
    $message =$_POST['message'];
    $headers = "From:".$_POST['name']."(".$_POST['email'].")";
    mail($to,$subject,$message,$headers);
    $response = "The mail has been sent. Thank You the valid mail.";
     header("Content-Type: application/json; charset=utf-8", true);
     echo json_encode($response);
?>

我现在需要的只是让$response文本得到警告.
任何帮助将不胜感激.

解决方法:

从ajax调用中删除以下代码并尝试：

contentType: "application/json; charset=utf-8",

不需要jQuery.parseJSON(data),因为Content-Type是通过以下代码在json中设置和编码的：

header("Content-Type: application/json; charset=utf-8", true);
echo json_encode($response);

更新了包含测试数据的代码

JS

$.ajax({
    type: 'POST',
    dataType: "json",
    url  : 'beemailer.PHP',
    data: {name: 'rai', email: '[e-mail]', message: 'Test message', subject: 'Test subject'},
    success : function(data) {
        console.log(data);
        alert(data);
    },
    error: function(error, x, y)
    {
        console.log(error);
        alert(x, y);
    }
});

PHP(beemailer.PHP)

<?PHP
$to = "[e-mail]";
$subject = $_POST['subject'];
$message = $_POST['message'];
$headers = "From:" . $_POST['name'] . "(" . $_POST['email'] . ")";
mail($to, $subject, $message, $headers);
$response = "The mail has been sent. Thank You the valid mail.";
header("Content-Type: application/json; charset=utf-8", true);
echo json_encode($response);
?>

对象示例：

$result = array();
$result['status'] = 'success';
$result['message'] = 'The mail has been sent. Thank You the valid mail.';
header("Content-Type: application/json; charset=utf-8", true);
echo json_encode($result);

JS访问对象：

$.ajax({
    type: 'POST',
    dataType: "json",
    url  : 'beemailer.PHP',
    data: {name: 'rai', email: '[e-mail]', message: 'Test message', subject: 'Test subject'},
    success : function(data) {
        alert('status: ' + data.status + '\nmessage: ' + data.message);
    },
    error: function(error, x, y)
    {
        console.log(error);
        alert(x, y);
    }
});