What are the differences between using session settings in the php.ini file versus setting them within a PHP script using "ini_set"?

When setting session settings in the php.ini file, the changes will affect all scripts running on the server. On the other hand, using "ini_set" within a PHP script allows you to change session settings for that specific script only. This gives you more flexibility and control over the session settings on a per-script basis.

// Setting session settings in php.ini file
// session.gc_maxlifetime = 3600;

// Setting session settings using ini_set in PHP script
ini_set('session.gc_maxlifetime', 3600);