Apache/PHP application sessions timing out

I am fairly new to PHP and am running an open source web application called 开发者_JS百科GLPI. We have several users that have the application open all day long and after a while they have to log back on the application. Is this the Apache session timing out? If so what is the default and how do I change it.

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Try setting the session lifetime to a day (24*60*60 seconds):

In your php.ini:

session.gc_maxlifetime = 86400

In the code:

ini_set( 'session.gc_maxlifetime' ,86400);

http://www.php.net/manual/en/session.configuration.php#ini.session.gc-maxlifetime