We’ve already looked at one header manipulation: the downloads class sends headers that cause the browser to download the file instead of display it.
header('Content-Type: audio/mpeg');
header('Content-Disposition: attachment; filename="Complicated Man.mp3"');
What is a content type?
The Internet uses MIME types to identify a type of file, so that the visitor’s operating system can know what applications are able to open it. You can see more about MIME types at:
• http://www.w3schools.com/media/media_mimeref.asp
• http://en.wikipedia.org/wiki/Internet_media_type
MIME types are used by e-mail (just as most headers are) as well as web servers.
