do I need to use exit after header(“Location: http://localhost/…”);?

Question

I\'m creating a script to validate a form and I was asking myself a question. When I use a header (see example below), do I need to use exit right after? I mean, does using head

Answer 1

does using header also means that it is exiting by default

How so? What if your header is not Location: one but Content-type: or Cache-control or whatever else?