PHP - user exit

[Chirieac]

Hello! I have a question:
How do I find when a person enters my site and leave?
Bye!

[dagon]

enter - log file or a logging script
exit -never with any certainty

[Chirieac]

Thanks, dagon! I will try something else for my problem.
To be clear here's what I want to do:
I've learned a little about MFC sockets and I've managed to do a chat application.
I run the server and my friend connect to me and can talk to each other. The problem is that I have a dynamic ip and I must tell them every time what is it. So every time my server starts he access my site like this (I run iexplorer with my address in the command argument): mysite.com/adress.php?ip=myip. I use the $_GET['ip'] to get the ip and displayed on my site.
What I want now is to make something to tell them when my server is running and when is not, like a status.
Thanks again, bye!

[Xager]

exit - only with javascript

[leatherback]

If you wanna cheat: Google analytics

[dagon]

why not just use one f the many stand alone chat apps

[Chirieac]

Because I want to learn programming...
So there is no way to find when the user has left your page/site?!
I know that with php session you can store user information and that information is deleted very quickly after the user has left the website that uses sessions. So, why there is no way to know when that information has been deleted?

[dagon]

php is not the appropriately language for this.

[Chirieac]

Thanks for your reply! I will see... Bye!