Generate error 403 php

Question

Hello, I have a php page where I wanted when the user was not logged in to generate a 403 error and present a default page in apache.
The default 403 error page is working, I just wanted it to error in php as if I tried to view a directory.

Answer 1

Compare whether the user is logged in or not, if you are not setting the header for the exit error:

header("HTTP/1.0 403 Forbidden");