PHP script to download file not working in IE

Question

I have a script that takes a key from $_GET[\'key\'] , looks up the location in a database and uses the readfile together with some headers to present a download for the use

Answer 1

Replace this:
header("Content-type: application/octet-stream");
with this:
header("Content-Type: application/force-download");

According to this post, IE doesn't normally listen to your headers, and instead looks for itself what you are sending.