NYCPHP Meetup

[bzcoder]

While I'm not familiar with this much at all, I dug through minify and 
they have a number of headers set there, so you might want to see how 
they do it.  After all, their up to version 2, so they must have gone 
through the pain of headers already.

http://code.google.com/p/minify/


(Minify is a library you can use to combine/compress css or javascript 
files on a page to save loadtime)