php sessions

[TouchTheClouds]

I use sessions without cookies, all variables - sessio_register().
Is it possible to log somewhere in the temp, what users are currently loged in? I just wanna smth like that:
echo "currently logged in: $user1, $user2";
sorry for grammar and for stupid question 🙂

[nightowl]

You would need to keep a logfile of that on your server. After you open the session for the user (which sets a cookie on his computer), you should also write some information in a textfile or in a database on the server. For example: you keep there the username and the time he logged in (started the session). After he logs out or after a certain period of time, you expect that he is not active anymore and you delete the item from the textfile / database

[TouchTheClouds]

something like that?

session_register(login);
write_log($login); //function to write into log file
$logged_users = read_log(log.txt); //function to read log file
echo "currently logged in: $logged_users"; 

and another question. I try to write something like that:

$logout = session_unregister(login);
echo "<a href=index.php,logout>click here to logout</a>";

however, script logs me out instanly whithout any clicking 🙂 Is there any way to set variable like this without being executed?

[Aeiri]

You need to set up a form that checks every time. A logout.php file.

[nightowl]

since not all users will manually log out, you would need to check if the time since they logged in hasn't exceeded a certain period of time, like 15 minutes or so.

[TouchTheClouds]

Originally posted by nightowl
since not all users will manually log out, you would need to check if the time since they logged in hasn't exceeded a certain period of time, like 15 minutes or so.

can you or someone post a simple code of that?
i have no practice with sessions at all 🙂 thanks a lot