PHP header [removed] - what are the implications?

Question

I have domain.com. If the user is logged in, it should load automatically domain.com/option-X where X is a predefined choice of the user.

Answer 1

This is better:

Just one call including code 301. Also notice the relative path to the file in the same directory (not "/dir/dir/new_page.php", etc.), which all modern browsers seem to support.

I think this is valid since PHP 5.1.2, possibly earlier.