phpmyadmin automatic logout time

In PHPMyAdmin 4 this no longer appears in the config.inc.php file. Instead go to PHPMyAdmin in your browser. Ensure you are at the localhost level to see the Settings link. Then set Settings > Features > Change the value of 'Login cookie validity' > Save

You can change the cookie time session feature at phpmyadmin web interface

Settings->Features->General->Login cookie validity

OR

If you want to change the 'login cookie validity' in configuration file, then open the phpmMyAdmin configuration file, config.inc.php in the root directory of PHPMyAdmin.(root directory is usually /etc/phpmyadmin/)

After locating the config.inc.php , search for the line below and set it to the value of seconds you want phpmyadmin to timeout:

['LoginCookieValidity'] 

If you couldn't find the above line, just add the following:

$cfg['Servers'][$i]['LoginCookieValidity'] = <your_new_timeout>;

For example:

$cfg['Servers'][$i]['LoginCookieValidity'] = 3600 * 3;

The Timeout is set to 3 Hours from the Example above.

session.gc_maxlifetime might limit session validity and if the session is lost, the login cookie is also invalidated. So, we may need to set the session.gc_maxlifetime in php.ini configuration file(file location is /etc/php5 /apache2/php.ini in ubuntu).

session.gc_maxlifetime = 3600 * 3

---

phpMyAdmin Documentation on LoginCookieValidity

$cfg['LoginCookieValidity']

Type: integer [number of seconds]
Default value: 1440

Define how long a login cookie is valid. Please note that php configuration option session.gc_maxlifetime might limit session validity and if the session is lost, the login cookie is also invalidated. So it is a good idea to set session.gc_maxlifetime at least to the same value of $cfg['LoginCookieValidity'].

NOTE:

1. If your server crashed and cannot load your phpmyadmin page, check your apache log at /var/log/apache2/error.log. If you got PHP Fatal error: Call to a member function get() on a non-object in /path/to/phpmyadmin/libraries/Header.class.php on line 135, then do a chmod 644 config.inc.php. that should take care of the error.
2. If you get the warning: Your PHP parameter session.gc_maxlifetime is lower that cookie validity configured in phpMyAdmin, because of this, your login will expire sooner than configured in phpMyAdmin., then change the session.gc_maxlifetime as mentioned above.

Changing php.ini will change the session duration for all the websites running on the server. To change it just for PhpMyAdmin, open config.inc.php and add:

$sessionDuration = 60*60*24*7; // 60*60*24*7 = one week
ini_set('session.gc_maxlifetime', $sessionDuration);
$cfg['LoginCookieValidity'] = $sessionDuration;

Create or edit your php.ini file and set this variable value in it:

session.gc_maxlifetime = 1440

The integer is in seconds. 500000 seconds is 5.7 days. Then restart apache.