Where can I find all of the different types of headers, i.e. as in header("Location: blah")? Thanks for any help.
Here's a big reference page for you (number 14 is the list of Header Field Definitions):
http://www.w3.org/Protocols/rfc2616/rfc2616
This first page links to another page that actually contains the information. You could just browse the second page directly (http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14), but you might have to do a lot of scrolling before you find the information you are looking for.
My suggestion is to use the first link.
HTH
Thanks a lot 🙂