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Editorial Team
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Asked: 2026-06-10T19:23:10+00:00

I have made a server – client app in android with php and mysql.

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I have made a server – client app in android with php and mysql. When any new user registers and clicks on submit button then his/her information goes to php and gets stored in mysql database that is on the internet.

And then i have get that list of peoples in listview who are registered before in my app and in listview i can see all that people but now i want to add a functionality that can check who is online right now in my app. I will make two buttons ONLINE and OFFLINE. When i press the ONLINE buttons only those people should be display who are using this app right now.

I have also search this in web but i dint find any proper result, so please anybody who have made this before please give me some idea or link of tutorial regarding this.
Thank you for your time.

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1 Answer

  1. Editorial Team

    In your DB, add a field called (last_login as DateTime). This field is updated each time the user logins to the application, and start a new session. Use a query similar to the below.

    UPDATE tbl_users SET last_login=NOW() WHERE ID_FIELD = $USER_ID

    Whenever a user clicks the (Who is Online) button, a PHP script is called that queries all the user where the last_login field contains a value for example less than 3 hours.

    The query you can use

    SELECT * FROM tbl_users WHERE TIMESTAMPDIFF(HOUR,last_login,NOW()) <=3

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