change http ref using cURL and PHP - php

Question

I am using cURL to change the HTTP ref for a site that only allow you to see their content if it's coming from search engins:
I was able to do that!
But the problem is: the IP address of the visitor the site get is not mine! it's the IP address of the site I'm using to change the ref !, here is the code:
echo geturl('http://example.com', 'http://referring-site.com');
function geturl($url, $referer) {
$headers[] = 'Accept: image/gif, image/x-bitmap, image/jpeg, image/pjpeg,text/html,application/xhtml+xml';
$headers[] = 'Connection: Keep-Alive';
$headers[] = 'Content-type: application/x-www-form-urlencoded;charset=UTF-8';
$useragent = 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.0.3705; .NET CLR 1.1.4322; Media Center PC 4.0)';
$process = curl_init($url);
curl_setopt($process, CURLOPT_HTTPHEADER, $headers);
curl_setopt($process, CURLOPT_HEADER, 0);
curl_setopt($process, CURLOPT_USERAGENT, $useragent);
curl_setopt($process, CURLOPT_REFERER, $referer);
curl_setopt($process, CURLOPT_TIMEOUT, 30);
curl_setopt($process, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($process, CURLOPT_FOLLOWLOCATION, 1);
$return = curl_exec($process);
curl_close($process);
return $return;
}
Let say I use that code on
mysite.com
So example.com will si referring-site.com as an HTTP ref, but it thinks that the visitors IP is the same as mysite.com !!!
Ho can I get it to get the real IP address of the visitor in stead of the site's IP I use the code on?
I tried to replace
return $return;
with
return "<?php
header( 'Location: http://example.com' ) ;
?>";
or
echo '<META HTTP-EQUIV='Refresh' Content='0; URL=http://example.com'>';
But it doesn't work!

Answer 1

What you are doing is proxying the request and lying about the referer. Since the request is coming from your server, it is under your control so that sort of underhand deception is possible.
There is no way for a website to induce a browser into making that sort of lie.