proxy.php

<?php

error_reporting(E_ALL);
ini_set('display_errors', '1');

/* Set it true for debugging. */
$logHeaders = FALSE;

/* Site to forward requests to.  */
$site = 'http://IP/';

/* Domains to use when rewriting some headers. */
$remoteDomain = 'remotesite.domain.tld';
$proxyDomain = 'proxysite.tld';

$request = $_SERVER['REQUEST_URI'];
$request = str_replace('/proxy.php', '', $request);

$ch = curl_init();

/* If there was a POST request, then forward that as well.*/
if ($_SERVER['REQUEST_METHOD'] == 'POST')
{

    curl_setopt($ch, CURLOPT_POST, TRUE);
    if($_FILES){
        $header = array('Content-Type: multipart/form-data');
        curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
        foreach ($_FILES as $key =>$file) {
            if (function_exists('curl_file_create')) { // php 5.5+
                $cFile = curl_file_create($file["tmp_name"], $file["type"],
                    $key.pathinfo($file, PATHINFO_EXTENSION).'.'. strtolower(explode('.', $file["name"])[1]));
            } else { //
                $cFile = '@' . realpath($file["tmp_name"]);
            }
            $post = array('file_contents'=> $cFile);
            $postFields = array_merge($_POST, $post);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $postFields);
        }
    } else {
        curl_setopt($ch, CURLOPT_POSTFIELDS, $_POST);
    }
}
/*if($_FILES){
    foreach ($_FILES as $file) {
        die($file["name"].'-'.$file["size"].'-'.$file["tmp_name"].'-'.$file["type"]);
    }
}*/

curl_setopt($ch, CURLOPT_URL, $site . $request);
curl_setopt($ch, CURLOPT_HEADER, TRUE);

$headers = getallheaders();

/* Translate some headers to make the remote party think we actually browsing that site. */
$extraHeaders = array();
if (isset($headers['Referer']))
{
    $extraHeaders[] = 'Referer: '. str_replace($proxyDomain, $remoteDomain, $headers['Referer']);
}
if (isset($headers['Origin']))
{
    $extraHeaders[] = 'Origin: '. str_replace($proxyDomain, $remoteDomain, $headers['Origin']);
}

/* Forward cookie as it came.  */
curl_setopt($ch, CURLOPT_HTTPHEADER, $extraHeaders);
if (isset($headers['Cookie']))
{
    curl_setopt($ch, CURLOPT_COOKIE, $headers['Cookie']);
}
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);

if ($logHeaders)
{
    $f = fopen("headers.txt", "a");
    curl_setopt($ch, CURLOPT_VERBOSE, TRUE);
    curl_setopt($ch, CURLOPT_STDERR, $f);
}

curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
$response = curl_exec($ch);

$header_size = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
$headers = substr($response, 0, $header_size);
$body = substr($response, $header_size);

$headerArray = explode(PHP_EOL, $headers);

/* Process response headers. */
foreach($headerArray as $header)
{
    $colonPos = strpos($header, ':');
    if ($colonPos !== FALSE)
    {
        $headerName = substr($header, 0, $colonPos);

        /* Ignore content headers, let the webserver decide how to deal with the content. */
        if (trim($headerName) == 'Content-Encoding') continue;
        if (trim($headerName) == 'Content-Length') continue;
        if (trim($headerName) == 'Transfer-Encoding') continue;
        if (trim($headerName) == 'Location') continue;
        /* -- */
        /* Change cookie domain for the proxy */
        if (trim($headerName) == 'Set-Cookie')
        {
            $header = str_replace('domain='.$remoteDomain, 'domain='.$proxyDomain, $header);
        }
        /* -- */

    }
    header($header, FALSE);
}

echo $body;

if ($logHeaders)
{
    fclose($f);
}
curl_close($ch);

?>