Php who is online?

[Dominic]

Hello, I would like to ask you a problem concerning my situation, php who is online This is urgent, please answer the question quickly.

[Patrick]

Because of the nature of the web, you can't know when a user disconnects, yanks the cable or shuts down his computer without politely telling you.

You could have a script (AJAX) check every X minutes to see if the browser still responds, and if not, toggle offline