Re: Proxy Hide URL shows internal IP of server sending info Part 2:

Add what you suggested and also the same with REMOTE_ADDR and both give NULL as the result.

Here is how I added snipped to save space

<?php
var_dump($SERVER);
var_dump($REMOTE_ADDR);

/**
 * Piwik - Open source web analytics
 * Piwik Proxy Hide URL
 *
 * @link [piwik.org]
 * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
 */

Result

NULL
NULL
/*!
 * Piwik - Web Analytics
 *
 * JavaScript tracking client
 *
 * @link [piwik.org]
 * @source https://github.com/piwik/piwik/blob/master/js/piwik.js
 * @license [piwik.org] Simplified BSD (also in js/LICENSE.txt)
 */

Could the issue maybe be the server where the proxy script is, is not setting either properly for some reason?

Thanks