First locate php.ini

root@host[~]# php -i | grep php.ini
Configuration File (php.ini) Path => /usr/local/lib
Loaded Configuration File => /usr/local/lib/php.ini

Get current session time out time

root@host[~]# grep -i session.gc_maxlifetime /usr/local/lib/php.ini
session.gc_maxlifetime = 14400
; setting session.gc_maxlifetime to 1440 (1440 seconds = 24 minutes):

Edit php.ini

root@host [~]# vi /usr/local/lib/php.ini

Change value of session.gc_maxlifetime.

Restart httpd service!! its done

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