Link zum "speichern unter" anbieten?

[butterbrot]

<?php
function file_name($name) {
 $name = explode("/",$name);
 return end($name);
}

if (file_exists($_GET[file])=="1"){
 header("Content-Type: application/octet-stream");
 header("Content-Length: " . filesize($_GET[file]));
 header("Content-Disposition: attachment; filename=" . file_name($_GET[file]));
 header("Pragma: no-cache");
 header("Expires: 0");
 readfile($_GET[file]);
 }
?>
das sollte gehen