do you have to send headers again on a cached page

[londrum]

hello. i've just got what i hope is a simple question..

i've got some dynamic pages on my site, so i've set php up to cache them in the normal way to speed up delivery.

but i was just wondering... do you have to include the headers again when it reads the cached page, or will the original headers become part of the cached page?

[StupidScript]

The original headers are persistent.