Workshop

Quiz

1:	Which function would you use to start or resume a session?
2:	Which function contains the current session's ID?
3:	How can you associate a variable with a session?
4:	How would you end a session and erase all traces of it for future visits?
5:	How would you destroy session variables both within the current script and the session?
6:	What does the SID constant return?

Answers

A1:	You can start a session with the session_start() function.
A2:	You can access the session's ID with the session_id() function.
A3:	You set an element in the superglobal $_SESSION array.
A4:	The session_destroy() function removes all traces of a session for future requests.
A5:	You can unset session elements by unsetting all elements of the $_SESSION array, like so: $_SESSION = array();
A6:	If cookies are not available, the SID constant contains a name/value pair that can be incorporated in a query string. This will pass the session ID from script request to script request.