Update all custom php.ini files for webs on main php.ini change
If the main system php.ini (like /etc/php5/cgi/php.ini) is changed these changes should also be done in the custom php.ini files of the webs.
If the main system php.ini (like /etc/php5/cgi/php.ini) is changed these changes should also be done in the custom php.ini files of the webs.