php code for total users logged in

On Thu, 6 Mar 2008 03:31:47 +0000 (UTC), "jim balthrop"
<webforumsuser@macromedia.com> wrote:

> i use session cookie to show a person logged in as 'user name' i would
>like to add the total number of members logged in at any moment

I know some sites that display a number like that, however, it's never
really accurate. You can keep track of users that log in. You can keep
track of users who specifically take the action of logging out. You
cannot keep track of the users who simply navigate way from the site, or
close their browser so it's not really worth the effort.

Gary