php - Logged out from one tab. User should logged out from other tab -

I am using jQuery's AJAX call to update the data. I have been logged into Firefox on two separate tabs.

I logged out from a tab, the second tab has not yet been refreshed.

When I try to update the data via AJAX, the call executed properly is called.

How do I execute that the user logs out and displays an error while executing the AJAX call?

Before processing the AJAX call on the server side, you must have a check that the user is logged in.

If no session is found, return a special error in the AJAX call; For example: JSON:

  {"status": "error", "error": "logout"}  

If the application receives this information , The user has a "session expired" message for the display and they are redirected to the login (or other appropriate) page.