[pmwiki-users] which files must be in public_html

[JB]

My web site browser root URL for www.something.com 
(for the main index.php) starts in 

    /var/www/home/something/public_html/

My wiki farm directory is on the same level as my public_html.

    /var/www/home/something/wikifarm/

I think I was reading that this is more secure because the 
wikifarm files are not publicly available on the internet.

What are the required files/directories that have to be available
in public_html?