It's truely amazing how little help there really is here. I've just spent 5 days getting something to work...with no help. Anyway, I found it.
At the top of your page right after the <?PHP put:
header("location: http://yahoo.com");
This works fine...but it disconnects any echo you may have set up. You can put this anywhere actually except after any data is sent or within a function. That's why the top of the page is recommended.
I'd like something in the echo that does this...just in case something goes wrong and they can see an error message. But this would be after the data has been sent...so I don't think it's possible.
Anyway...there it is.
(I wish others would have helped me with complete answers instead of abstracts...This is a help forum!)