How to Create Another Mediawiki Using the Same Source Code
From Devpit
How to Create Another Mediawiki on the Same Server, Using the Same Source Code, Using the Same Database, but with it's own Tables
Scenario
You have successfully installed Mediawiki and now want to create another, separate wiki on the same server using new tables but within the same database and using the same source code.
Example
Visitors to your site www.website.com are presented with MyFirstWiki. You want visitors to www.website.com/anotherwiki to be presented with an entirely different wiki. However, you want to have a single set of source code for both wikis, and you want to keep the tables for both wikis separate but within the same database.