How can I redirect in PHP without header errors?

Question

How can I redirect in PHP with this setup below without getting header output errors, I understand that nothing can be printed to the browser before a header is set, I am lookin

Answer 1

Can't you just do this:

Or, put the include files in every one of the "SOME-FILE-HERE"-type files, if that's possible, so you end up with:

Page heading
...page content etc...