How do I use my server as a proxy to download files via PHP?

Question

I need my server to act as a proxy between a 3rd party server (where the file is originally located) and the end user. That is, my server downloads the file from the 3rd party s

Answer 1

        $fp = fopen($url, 'rb');
        foreach (get_headers($url) as $header)
        {
            header($header);
        }

        fpassthru($fp);
        exit;

This will simply download a remote file to the browser with correct headers.

Answer 2

Very very simply like this:

$url = $_GET['file'];
$path_parts = pathinfo($url);

$ext = $path_parts['extension'];
$filename = $path_parts['filename'];

header("Content-type: application/$ext");
header("Content-Disposition: attachment; filename=$filename");

echo file_get_contents($url);

If the file is larger than a few megabytes, use fopen fread and frwrite download the file in chunks and send to the client in chunks.