How to force the user to download a file, not to view it?

Question

I have a download page where i have kept musics, pictures, ebooks and etc. Whenever users click at the image it opens it, and same things happen with .pdf files if the user

Answer 1

You have to add a header to force the download.

header("Content-Disposition: Attachment")
header("Content-Disposition: Attachment;filename=FILENAME_HERE")

from http://www.symkat.com/force-download-with-http-headers