debian - can use php-unix.ini

On Windows default php.ini is replaced by one passed by -c parametr, but on Debian (don't know how about another linux distributions, but it doesn't matter) is new php.ini added to all settings (default php.ini, modules .ini - https://wiki.debian.org/PHP/). This file is parsed first, so every setting you would change is replaced by default php.ini or modules settings. It makes sense to clear all configuration files every time (php -n).