best way to terminate session on cc signup?

[btimms]

I'm working on a site that requires a registration form and this information is then carried forward in a session to a credit card checkout. After submission to the gateway and authorization returns I save all in a data base and show a receipt page . My question is the best way to terminate the session. If I do it on opening of the receipt page and the client does a refresh the data is gone - which may be OK. I don't have much experience here so any suggestions would be appreciated.

[NogDog]

If you just want to clear certain data from the session, you could simply [man]unset/man each relevant item, e.g.:

unset($_SESSION['cc_nbr']);
unset($_SESSION['cc_exp_date']);

If you want to clear all session data, just reinitialize $SESSION as an empty array (but do not ever unset $SESSION itself):

$_SESSION = array();