PHP Count Logged-In Users

Question

I\'m having trouble figuring out how I can count the number of logged-in users in my application.

What I have: When a user logs in, they get a sessi

Answer 1

Just to offer another solution:

if ($user->isLoggedIn()) {
  touch("/writable/path/loggedInUsers/" . $user->id);
}

If you don't need to query this data, a local file touch is far faster than a DB write. To get logged in users, scan the directory for filemtimes under N seconds old.