(Ubuntu - Lamp) Why exist in Ubuntu lamp 2 PHP.ini files?

PHP can be executed from the command line or from a webserver. /etc/php5/apache2/php.ini is used for the webserver execution, /etc/php5/cli/php.ini is used for the command line execution.

http://superuser.com/questions/147743/ubuntu-lamp-why-exist-in-ubuntu-lamp-2-php-ini-files