sessions

As the Internet evolves, so do the black hats that abuse the net and its inhabitants to their needs. A very common requirement therefore these days is to limit the session lifetime in a PHP application. PHP provides several directives in php.ini to achieve the desired configuration.
This post will focus on how to have session expiration in Drupal (at least it mention most ways to do it, I think) but any PHP programmer unfamiliar with this issue could be enlightened by it (I think).