I have a squid cache that makes people authenticate... I'd like to set up
PHP page that displays some information about the person logged in
based on the username they are using..
I did a phpinfo() but the squid auth username doesn't appear in any global variables...
That is because squid doesn't pass the authentication information to the web server (nor should it!).
How do I find out the username of the person viewing my php script?
You can't easily.
Is there any way to list all the users who are currently logged in ?
HTTP is a stateless protocol. Nobody is "logged in", they just make requests.
You could fake this by importing access log entries into a database and then searching for people who have made requests in the recent past (e.g. in the last five minutes).
Matthew.
