JSON.stringify sends empty object

Question

I decided to stop using jQuery so I'm converting everything to pure JavaScript.

I have this ajax call and I want to send the last part of the url to the php server, but JSON.stringify() sends anempty object in the server.

Why is this happening?

AJAX call:

var ajax = new XMLHttpRequest();

ajax.open('get', 'ajax/autocomplete.php');
ajax.setRequestHeader('Content-Type', 'application/json;charset=UTF-8');
ajax.send(JSON.stringify({q: document.location.href.split('/').slice(-1)[0]}));

PHP:

<?php
    require_once '../../private/core/init.php';
    header('Content-Type: application/json');

    print_r($_GET);//empty

    $data = new AUTOCOMPLETE($_GET['q']);
    echo json_encode($data->data());
?>

and I get this error: Undefined index: q

I don't think you should send a request entity with a GET request. Do a POST or use a query parameter (?q=......). — Thilo
– Thilo, Commented Feb 12, 2016 at 2:19
The parameter data can only be sent with POST requests. data will not be placed inside the request body if any other request method is used. documentation — Jaromanda X
– Jaromanda X, Commented Feb 12, 2016 at 2:20

jjwdesign · Accepted Answer · 2016-02-12 02:35:42Z

1

You might want to suppress PHP errors with error_reporting(0); or validate the input data first with isset/empty or some other function that will suppress the PHP warnings. The warning output will make your JSON response data invalid to your javascript (jQuery or pure javascript).

<?php
error_reporting(0);
require_once '../../private/core/init.php';
header('Content-Type: application/json');

if (isset($_GET['q'])) {
    $data = new AUTOCOMPLETE($_GET['q']);
    echo json_encode($data->data());
}
?>

answered Feb 12, 2016 at 2:35

jjwdesign

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1 Comment

M1X Over a year ago

yeah but the same problems occurs even when I do POST request. whats the problem? I still get an empty object even with POST

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