Hello

If you want to centralize the PHP settings, and you don't want to put directives in .htacces or php.ini files, here is the solution :

if you want to use only one php.ini file for all your sites. You need to create .htaccess file in main directory (/public_html/.htaccess) and put into variable:
================
SetEnv PHPRC /location/username/folder/containing/phpinifile
================
This is the solution provided by the WHB support and it works like a charm.

Regards
silexian