header("Cache-control: private");
header("Content-Disposition: attachment; filename=" . basename($link));
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header('Content-Type: application/'.$uzanti.'');
header("Content-Type: application/force-download");
header("Content-Type: application/octet-stream");
header("Content-Type: application/download");

Bunlara gerek yok