This code snippet is useful to copy a large file from other server and store it to your server.

grabfile.php

<?php
set_time_limit(0);

//This is the file where we save the information
$fp = fopen (dirname(__FILE__) . '/filename.rar', 'w+'); 

//Here is the file we are downloading, replace spaces with %20
$ch = curl_init(str_replace(" ","%20", 'http://someserver.crot/filename.rar'));

curl_setopt($ch, CURLOPT_TIMEOUT, 50);

// write curl response to file
curl_setopt($ch, CURLOPT_FILE, $fp); 
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);

// get curl response
curl_exec($ch); 
curl_close($ch);
fclose($fp);

?>