Mediawiki hacks: Page by Page Access Restriction Extension

I created a mediawiki extension that restricts page access (view/edit) based upon users, group. I posted the extension in meta.wikimedia.org.

There's one convincing extension PageProtection, but it requires PEAR. I was looking for a simple extension.

I altered and added features to http://www.epistemographer.com/?p=238

Also cache was also giving problem. The code at thinkhole.org helped in disabling cache.