speedtest/backend/empty.php

<?php
header( "HTTP/1.1 200 OK" );
if(isset($_GET["cors"])){
    header('Access-Control-Allow-Origin: *');
    header('Access-Control-Allow-Methods: GET, POST');
    header('Access-Control-Allow-Headers: Content-Encoding, Content-Type');
}
header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0, s-maxage=0");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
header("Connection: keep-alive");
?>