Should I document session_get_cookie_params => setcookie?

Hello, Today I wanted to check from JavaScript whether a session was started but the system sets the session cookie to httponly so I can't do that so I wanted to do setcookie('has_session', 1, session_get_cookie_params()). This of course (?) doesn't work. Should I add a code snippet on how to make it work to session_get_cookie_params and / or setcookie or should I just submit to Stackoverflow as a self answer? I already added https://marc.info/?l=php-doc-cvs&m=159105012229429&w=2 because that's generic enough. Speaking of, should I amend the return values of setcookie to include this null or just this commit is enough? Best, NK