What language is Wikipedia programmed in?

Question

What language is Wikipedia programmed in?

Answer 1

It is programmed in PHP.

Answer 2

It uses PHP/MySQL, in combination with the MediaWiki wiki software.

This is the same as all the Wikimedia projects - Wiktionary, Wikinews, Wikiquotes, etc.

MediaWiki also powers many, many other sites - you can usually tell by the look-and-feel. The major one is Wikia

Answer 3

Interestingly, you can answer that on wikipedia (It's PHP).

Answer 4

Wikipedia runs on MediaWiki software, which uses PHP and MySQL (although by now, MediaWiki might support other SQL databases, such as PostgreSQL - you'll have to check the docs).