phpmyadmin logs out after 1440 secs

Question

Go to PHPMyAdmin in your browser

Settings > Features > Change the value of Login cookie validity > Save

NOTE: You will have to do this per session.

Add this line to /config.inc.php:

$cfg['LoginCookieValidity'] = 36000;

In /setup/lib/index.lib.php

$cf->getValue('LoginCookieValidity') > 36000;

If you don't already have a .htaccess file for your phpMyAdmin site, create one, and add the following line to override the default PHP session timeout:

php_value session.gc_maxlifetime 36000

I would not recommend altering this value in your main php.ini file, as it will allow a ridiculously long session timeout for all your PHP sites.

source: http://www.sitekickr.com/blog/increase-phpmyadmin-timeout/

We can change the cookie time session feature at:

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

I found the answer in here.. No activity within 1440 seconds; please log in again

EDIT:

This solution will work only for the current session, to change permanently do:

open config.inc.php in the root phpMyAdmin directory .

wamp folder: wamp\apps\phpmyadmin{version}\config.inc.php

ubuntu: /etc/phpmyadmin

add this line

$cfg['LoginCookieValidity'] = <your_timeout>;

Example

$cfg['LoginCookieValidity'] = '144000';

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:

$cfg['LoginCookieValidity'] 

or

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

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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. You will then get another 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.