How to record the session timeout in the database?

Question

PHP

There is a need to write down the session break time in the database.
php_value session.gc_maxlifetime - used the setting to live an active session for 30 minutes. That is, if the user is not active for more than 30 minutes, we log him out. Now there is a task to record the logout time in the database. The conditions are tough, even if the user was left without electricity or the computer exploded or he died, the logout time should still be in the database.
From here I need an idea, how can this be done?

Answer 1

For each user activity, write the time of death to the database 30 minutes in the future from the current moment.