This would be useful say if you have a file you just want to update in one place but use it on multiple domains. I’ve tested it and it works great. Helped me out a lot for a project I was working on.

<?php
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "http://www.SlySpyder.com");
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_exec($ch);
curl_close($ch);
?>

Replace http://www.SlySpyder.com with the file you want to grab

Via digitalpoint.com