Send JSON response in PHP

send_json.php

<?php

function send_json($payload, $status_code = 200)
{
    header('Access-Control-Allow-Origin: *');
    header('Content-Type: application/json');
    is_callable('http_send_status') ? http_send_status($status_code)
        : header("HTTP/1.1 $status_code");
    return exit(json_encode((object) $payload));
}