Php发送JSON响应但$ .getJSON没有收到它

Question

I have a problem with the JSON response I'm returning from my PHP code.

THe PHP on the backend

case 'deleteMySale':
    $id = $_GET['product_id'];
    $dataNoSer = "you want to delete sale where id= " . $id . "?";
    $data =  json_encode($dataNoSer, true);
    echo $data;
    break;

The JavaScript on the front-end that is calling the PHP

$('.deleteProduct').click(function () {
    var id = $(this).data('id');
    $.getJSON("http://localhost/myProject/deleteMySale?product_id=20", function (data) {
        console.log("success");
    })
            .done(function () {
                console.log("second success");
            })
            .fail(function () {
                console.log("error");
            })
            .always(function () {
                console.log("complete");
            });
})

Response

error
complete

The PHP function is called when I click the button, but I consistently get an error in the console.

Why does jQuery not receive the JSON data? I've read similar problems and their solutions, but I canott see where I'm going wrong.

Answer 1

That's a malformed JSON response. The issue is that you've passed a flat string to the encode function. The encode function does not encode strings, it encodes arrays and objects. Let's make it an array so we can get a real response.

$dataNoSer = array("question" => "you want to delete sale where id= " . $id . "?");

Also, if necessary, modify the headers before sending the response so that you're sure it's an application/json content-type on the response.

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

Access it like so.

console.log(data.question);