rename the default file name to something else?

[$php_mysql$]

ok this grabs mp3 from 4shared but the download link appears as preview.mp3

 

how could i get it to be renamed as the original reach name like here_without_you.p3 or something else?

 

<?php

$file = file_get_contents("http://www.4shared.com/audio/PmMMpPFs/here_without_you.htm"); 
$body = preg_replace("/.*file[^=]*=|\&volume.*/si", "", $file);  
preg_match("/((ftp)|(http(s?))\:\/\/(([A-z0-9\?\-\:\=\;\.\@\/]+)))/is",$body, $result);  
$download_url = $result[1];  

print_r($download_url);
?>

[BlueSkyIS]

use the rename() function to rename the file whatever you want.

[$php_mysql$]

where must i use it exactly? im unable to figure out which part of this script fetched te preview.,mp3