adentify

<?php
  header('Content-Type:text/plain'); // this script dumps the response object to the page, this just ensures it looks nice in the browser

  $conf["url"]           = "https://ipapi.co/json/";  // the URL you wish to fetch, this particular endpoint will return a JSON object detailing Geo/IP details of the proxy you are using as a proof the proxy is working
  $conf["useragent"]     = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.1) Gecko/20061204 Firefox/2.0.0.1";

  // NordVPN socks servers use specifc domains it seems - https://support.nordvpn.com/Connectivity/Proxy/1047410732/Proxy-setup-on-uTorrent.htm
  // uncomment whichever server you wish to check.
  //  $conf["proxy"]["host"] = "amsterdam.nl.socks.nordhold.net";
  //  $conf["proxy"]["host"] = "atlanta.us.socks.nordhold.net";

adentify

<?php
header("Content-type: text/plain");
$payload = "";
// pass delay as param with length of 'd' in milliseconds
if(isset($_GET['delay'])){
  $delay = $_GET['delay'];
  if($delay > 30000){ 
    $delay   = 0;
    $payload .= "// max timeout exceeded, we've set this as 0ms\n";
 }