The collaborative editing software that runs Wikipedia. This is a mirror from https://gerrit.wikimedia.org. See https://www.mediawiki.org/wiki/Developer_access for contributing.
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README.mediawiki

MediaWiki

MediaWiki is a free and open-source wiki software package written in PHP. It serves as the platform for Wikipedia and the other Wikimedia projects, used by hundreds of millions of people each month. MediaWiki is localised in over 350 languages and its reliability and robust feature set have earned it a large and vibrant community of third-party users and developers.

MediaWiki is:

  • feature-rich and extensible, both on-wiki and with hundreds of extensions;
  • scalable and suitable for both small and large sites;
  • simple to install, working on most hardware/software combinations; and
  • available in your language.
For system requirements, installation, and upgrade details, see the files RELEASE-NOTES, INSTALL, and UPGRADE.

MediaWiki is the result of global collaboration and cooperation. The CREDITS file lists technical contributors to the project. The COPYING file explains MediaWiki's copyright and license (GNU General Public License, version 2 or later). Many thanks to the Wikimedia community for testing and suggestions.