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This extension comes with MediaWiki 1.21 and above. Thus you do not have to download it again. However, you still need to follow the other instructions provided.
This extension should not be confused with Extension:InterWiki.
MediaWiki extensions manualManual:Extensions
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Release status:Extension status stable

MediaWiki extension Interwiki.png
ImplementationTemplate:Extension#type Special page
DescriptionTemplate:Extension#description Adds a special page to view and manipulate the interwiki table.
Author(s)Template:Extension#username Stephanie Amanda Stevens, SPQRobin
Latest versionTemplate:Extension#version 3.0 (2014-07-19)
MediaWikiTemplate:Extension#mediawiki 1.19+
Database changesTemplate:Extension#needs-updatephp No
LicenseTemplate:Extension#license GNU General Public License 2.0 or later
ExampleTemplate:Extension#example see here


Added rightsTemplate:Extension#rights


Translate the Interwiki extension if it is available at translatewiki.net

Check usage and version matrix.


Open tasks · Report a bug

The Interwiki extension adds the "Special:Interwiki" page to MediaWiki, to view and edit the interwiki table, and a log of any actions made with it.

Since Interwiki version 2.1, it works with the $wgInterwikiCache, and the CSS uses ResourceLoader.

The list of "Special:Interwiki" is identical to the API action=query&meta=siteinfo&siprop=interwikimap, except the iw_api field is not available.


These are recommended versions to use per MediaWiki version. If the recommended version does not work with a certain MediaWiki version, please let us know. Click the "(snapshot)" link to the right of your MediaWiki version in the table below.

Optionally, The extension can be retrieved directly from Git [?]:

  • Browse code
  • Some extensions have tags for stable releases.
  • Each branch is associated with a past MediaWiki release. There is also a "master" branch containing the latest alpha version (might require an alpha version of MediaWiki).

Extract the snapshot and place it in the extensions/Interwiki/ directory of your MediaWiki installation.

If you are familiar with git and have shell access to your server, you can also obtain the extension as follows:

cd extensions/
git clone https://gerrit.wikimedia.org/r/p/mediawiki/extensions/Interwiki.git


  • Download and place the file(s) in a directory called Interwiki in your extensions/ folder.
  • Add the following code at the bottom of your LocalSettings.php:
wfLoadExtension( 'Interwiki' );
// To grant sysops permissions to edit interwiki data
$wgGroupPermissions['sysop']['interwiki'] = true;

// To create a new user group that may edit interwiki data
// (bureaucrats can add users to this group)
#$wgGroupPermissions['developer']['interwiki'] = true;    #<---delete the comment indicator as appropriate
  • YesY Done - Navigate to Special:Version on your wiki to verify that the extension is successfully installed.

To users running MediaWiki 1.24 or earlier:

The instructions above describe the new way of installing this extension using wfLoadExtension() If you need to install this extension on these earlier versions (MediaWiki 1.24 and earlier), instead of wfLoadExtension( 'Interwiki' );, you need to use:

require_once "$IP/extensions/Interwiki/Interwiki.php";

Note Note:

  • The configuration that comes with MediaWiki will not grant permission to any user group. Thus, you will need to add the configuration yourself or no one will be able to edit interwikis.
  • To enable transclusion from other sites, you'll need to enable $wgEnableScaryTranscluding.
  • To disable adding prefixes through the Special:Interwiki interface, set $wgInterwikiViewOnly to true.
This extension's entry in the list of Special pages is not the name of the extension. The entry in the list is defined by the interwiki message item defined per locale in SpecialInterwiki.i18n.php. For English locales, its value is View and edit interwiki data.

Setting up interlanguage links[edit]

To set up interlanguage links using this extension, make sure that $wgInterwikiMagic is set to true and $wgHideInterlanguageLinks is set to false (they are like this by default, you don't need to change them usually). Then go to Special:Interwiki as a user with the appropriate permissions. For example, if the French version of your wiki was located at http://fr.foowiki.tld/wiki/, you could add http://fr.foowiki.tld/wiki/$1 to the interwiki table with values trans 0 and local 0. Then the interlanguage link to the French version would work, but a #REDIRECT to a French-language page from a page in some other language would be refused.

See Manual:Interwiki table for a full explanation of the forward (iw_local) and transclude (iw_trans) bits.

In brief:

  • Enabling forwarding ('local' true) is normally done between all languages and projects in the same group, as it allows a link to any one of the languages to be used as a gateway to the others. The English-language Wikipedia, for instance, sets the 'local' bit true for all of the other-language Wikipedias and for projects like commons:, wikinews: or wikivoyage:. A user on a wiki outside Wikipedia where the wikipedia: interwiki prefix points to en.wikipedia.org could create a link like wikipedia:fr:Encyclopédie. That link goes initially to "fr:Encyclopédie" on the English-language Wikipedia. The en.wikipedia server immediately recognises fr: as a 'local' interwiki link, so replies with a redirect to la Wikipédia where fr.wikipedia.org/wiki/Encyclopédie displays the requested French-language Wikipédia page [[Encyclopédie]] et voilà.
  • Enabling transclusion is rarely done, as it allows an article on one wiki to use templates from some other wiki. This is referred to as 'scary transclusion' as it will cause problems if the other wiki changes the template unexpectedly. A few wiki farms use this to create one 'central wiki' with various templates which are made available to other wikis in the same farm. If you don't need this, don't enable it.

Global interwikis[edit]

Since version 3, Interwiki supports defining a global/central database and pulling defined interwikis from there as well as from the local table. This functions essentially as a table merge, with local interwiki definitions overriding central. Language links are not pulled from the central table; these are set up as local-only due to a central table likely serving more than one project (with each having its own languages).

The central table is the interwiki table of the central wiki. This means that as far as the central wiki is concerned, it is basically just a normal non-global setup. There are therefore no special rights associated with the central (global) table, though it is likely you may want to be more picky about how you assign the 'interwiki' edit right on this wiki.

  • This was decided by looking at current possible use cases (ShoutWiki's hub, Uncyclomedia's central wiki, and Meta-Wiki) where the central wiki isn't going to have anything extra anyway.
  • This might change in the future, but anything more intelligent will require schema updates.
  • This probably doesn't work with table prefixes because of how the table is accessed.

To set up a central interwiki table, simply provide the name of the database of the wiki you want to use:

// To enable pulling global interwikis from a central database
$wgInterwikiCentralDB = 'mw_central';

Replace 'mw_central' with the name of the database.

For those using table prefixes here is an alternative solution for "pool_example_wiki" tables.

$wgSharedDB = 'example_wiki'; # The $wgDBname for the wiki database holding the main interwiki table
$wgSharedPrefix = 'pool_'; # The $wgDBprefix for the database. Defaults to the prefix of the current wiki if not specified
$wgSharedTables = ['interwiki'];

Protocol-relative URLs[edit]

MediaWiki supports protocol-relative URLs (PRURLs), from MediaWiki 1.18+. With a PRURL, a user accessing a page over http or https uses the same scheme to access the interwiki link. To use a PRURL, first ensure the destination server supports HTTPS; if it does, then simply remove the http: portion of the URL in the link table. For example, change




See also[edit]

Language:Project:Language policy English  • 日本語