Check for logged in user

[yojoe]

You'd have to use isset to check if a cookie exist, rather than checking boolean value of cookie_check() function.
Anyway, you won't check it without knowing name of the cookie, and it's not that simple, as the name contains the salt value.
Something like: getsimple_cookie_203rwzy^|epaw*ekf7zuj2m3o4ga3o~fw5tbatt

Maybe just looking if a cookie starting with "getsimple_cookie_" chars exist and is not null would be enough ?