Manual:Extensions

From MediaWiki.org
(Redirected from Extensions)
Jump to navigation Jump to search

Other languages:
Bahasa Indonesia • ‎Deutsch • ‎English • ‎Esperanto • ‎Türkçe • ‎dansk • ‎español • ‎français • ‎italiano • ‎magyar • ‎polski • ‎português • ‎português do Brasil • ‎română • ‎čeština • ‎Ελληνικά • ‎български • ‎мокшень • ‎русский • ‎العربية • ‎سنڌي • ‎پښتو • ‎ไทย • ‎中文 • ‎日本語 • ‎한국어
OOjs UI icon puzzle-ltr.svg Extensions: Development Tag extensions Parser functions Hooks Special pages Skins Magic words API Content models

Extensions let you customize how MediaWiki looks and works.

While some extensions are maintained by MediaWiki developers, others were written by third-party developers. As a result, many have bugs, and they are not all guaranteed to be compatible with each other. Some are unmaintained; not all extensions work on all versions of MediaWiki. Use any extension, especially those tagged as insecure, at your own risk. If you are using an extension that requires patches to the core software, be sure to backup your database. This helps avoid the risk of breaking your wiki.

Types of extensions

OOjs UI icon markup.svg Parser tags

Parser tags extend the built-in wiki markup with additional capabilities, whether simple string processing, or full-blown information retrieval.


Learn more about parser tags

OOjs UI icon code.svg Parser functions

Parser functions are special wiki markup syntax that can 'interact' with other wiki elements in the page, and give a specific output.


Learn more about parser functions

Plug-in Noun project 4032.svg Hooks

Hooks allow custom code to be executed when some defined event (such as saving a page or a user logging in) occurs.


Learn more about hooks

OOjs UI icon pageSettings.svg Special pages

Special pages are pages that are created by the software on demand to perform a specific function.


Learn more about special pages

OOjs UI icon browser-ltr.svg Skins

Skins allow users to customize the look and feel of MediaWiki.


Learn more about skins

OOjs UI icon quotes-ltr.svg Magic words

Magic words are a technique for mapping a variety of wiki text strings to a single ID that is associated with a function.


Learn more about magic words

API - The Noun Project.svg API

MediaWiki provides an action API, a web service that allows access to some wiki-features like authentication, page operations, and search.


Learn more about the MediaWiki API

OOjs UI icon article-ltr.svg Page content models

The ContentHandler introduced in MediaWiki 1.21 makes it possible for wiki pages to be composed of data other than wikitext, such as JSON or Markdown.


Learn more about content models

OOjs UI icon lock.svg Authentication

MediaWiki provides SessionManager and AuthManager, two authentication-related frameworks to enhance security via custom authentication mechanisms.


Learn more about authentication

Browsing extensions

You can browse Category:Extensions by category to see the full range of extensions that have already been written. For information on installing these extensions or writing your own, see below.

Checking installed extensions

Only someone with administration access to the filesystem (and often the database too) on a server can install extensions for MediaWiki, but anyone can check which extensions are active on an instance of MediaWiki by accessing the Special:Version page. For example, these extensions are active in the English Wikipedia.

Installing an extension

MediaWiki is ready to accept extensions just after installation is finished. To add an extension follow these steps:

  1. Before you start
    Many extensions provide instructions designed for installation using unix commands. You require shell access (SSH) to enter these commands listed on the extension help pages.
  2. Download your extension.
    Extension Distributor helps you to select and download most of the popular extensions.
    Extensions are usually distributed as modular packages. They generally go in their own subdirectory of $IP /extensions/. A list of extensions stored in the Wikimedia Git repository is located at git:mediawiki/extensions. Some extensions don't use version control and are not recommended.
    Some extensions are also available in bundles, composer or package repositories.
  3. Install your extension..
    At the end of the LocalSettings.php file, add:
    wfLoadExtension( 'ExtensionName' );
    
    This line forces the PHP interpreter to read the extension file, and thereby make it accessible to MediaWiki.
    Some extensions can conflict with maintenance scripts, for example if they directly access $_SERVER (not recommended).
    In this case they can be wrapped in the conditional so maintenance scripts can still run.
if ( !$wgCommandLineMode ) {
   wfLoadExtension ( 'ExtensionName' );
}
The maintenance script importDump.php will fail for any extension which requires customized namespaces which is included inside the conditional above such as Extension:Semantic MediaWiki , Extension:Semantic Forms .
Ensure that required permissions are set for extensions!
While this installation procedure is sufficient for most extensions, some require a different installation procedure. Check your extension's documentation for details.
If you want to alter configuration variables in LocalSettings.php, you have to do this typically after including the extension. Otherwise defaults defined in the extension will overwrite your settings.


Upgrading an extension

Some extensions require to be updated whenever you update MediaWiki, while others work with multiple versions. To upgrade to a new version of an extension:

  1. Download the new version of the extension
  2. Replace all the extension files in the extension/ExtensionName directory with the new files. Do not remove the extension configuration present in LocalSettings.php
  3. If the extension requires changes to the MediaWiki database, you will need to run the Update.php maintenance script. Most extensions will mention if this script needs to be run or not. (Perform backup of your data before executing the script). If you don't have command line access, you can also use the web updater.
These instructions cover 99% of extensions. If the specific extension you are upgrading has instructions that differ from these, you should probably follow the specific extension's instructions

Uninstalling an extension

Remove the line from LocalSettings.php with the extension name to uninstall it:

wfLoadExtension( 'ExtensionName' );
  • You must remove any lines pertaining to the configuration of the extension.
  • If the extension provides any database changes, you must run update.php to remove them.

See also

Extensions : Category All RequestsTag extensions Extensions FAQ Extension hook registryExtension default namespaces