And that's the problem. This works:
header('Location: http://www.[whatever].com');
That statement works to get the user to the [whatever] site--it displays just fine within the client window of the browser. The problem is that the URL is still being masked such that the user can't see the address string that she was just redirected to in the URL field, but rather she still sees the URL that she originally typed.
Is there a way to have the forward go through holistically, meaning not just the client area of the browser contains the final destination, but also the URL is the client destination's too?