Php Wiki code adapted for SVI-wiki
Question: How did you set it up so people have to "login" to see the private pages? Mine is not doing that and every time I search for info I end up at your site.
This was done by including external php identification routines in the Php Wiki code. Everytime a page is requested, the code first checks if it has an asterisk included at the end of the article name. If so, it checks if the user has logged in or ask the user to login. Otherwise (public article) it serves the page in the standard way.
The login routine is not in the original Php Wiki code, it is programmed by us. I can not publish our code for security reasons, but the idea is not complex and can be easily implemented with simple php code documented everywhere. See, e.g.,
http://www.devshed.com/c/a/PHP/Creating-a-Secure-PHP-Login-Script/
I google for 'php login' and get plenty of results.