PHPSESSID - The PHPSESSID cookie is native to PHP and enables websites to store serialised state data. On the Action website it is used to establish a user session and to pass state data via a temporary cookie, which is commonly referred to as a session cookie. As the PHPSESSID cookie has no timed expiry, it disappears when the client is closed.
REMEMBER & USER_ID - are set if you tick the "Remember me on this computer" box while logging in. They are then used to automatically log you in to your user account on your subsequent visits to this site.