doushih06137 2018-07-30 17:01
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如何为已登录的用户创建在线离线状态? [重复]

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In my database i inserted a column named "online" with a default value of 0. So when a user log in this value is updated to 1 so now it says the user is online. When a user click on log out this value gets updated to 0 again so now the user is offline. But i was thinking, what if the user just closed the browser without signing out, nothing will get updated and the user will stay online. Can you please help with guidance to how can I work this out ? Is there anyway of doing this with javascript or jquery ajax that detects when the browser is closed ?

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  • dongliu4320 2018-07-30 17:05
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    You can use onbeforeunload but this may prove to be inconsistent.

    If you always want to know if the user is connected to your service, you may want to look into using WebSockets with socket.io or similar.

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