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I want check how to know user is using my application facebook
Example: One user go to application page, i set user online, when user close application page, i set user offline
Thanks.
If you haven’t heard from a user for some time, chances are that he closed a page with your app.
Memorize last time a user did anything in your app, and set a timeout. If N minutes later there are no new actions, you mark him offline.