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
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.