SOLVED Custom php.ini for different vhosts

I think you can't do that. There is only one php.ini but you can change some values: http://php.net/manual/en/configuration.changes.php

There's this article from HowtoForge, but it's 3 years old and I have no idea whether or not it still works.

If that doesn't work, your only choice would be to switch to CGI/FastCGI, or use .htaccess to tweak per-site PHP configuration. Fortunately, most of the things that site owners might want to tweak can be tweaked via .htaccess, and the few things that can't be tweaked via .htaccess are off limits for a very good reason (security).

If you're feeling adventurous then PHP-FPM has this capability built in, each pool can have a separate ini file, or you can try this

http://php.net/manual/en/configuration. … r-user.php">http://php.net/manual/en/configuration.file.per-user.php

@hybinet

that link to the tutorial worked like a charm, thank you!