Passing a URL variable through login page into session variable

php is your server side language then. Please clarify the rest of your scenario with specifics. When someone clicks an event what is the parameters being passed? Ideally you'd have URL parameter keys consistent and have the value change depending on the event selected. So if someone clicks on event #1 in LA the url on login is something like this:

login.php?location=la&id=1

and if someone clicks on event #7 in New York the url on login is something like this:

login.php?location=ny&id=7

Is this how you currently have it setup or are the URL params different each time like this:

login.php?ny=7 or login.php?la=1

Please advise on how your URL parameters are being sent to login page. Also, do you want session set upon sucessful login or is it ok to set session variables before login and then use the values of those session after login is sucessfull.

best,

Shocker