Manual:LocalSettings.php

The file provides local configuration settings of a MediaWiki installation. You should take your time to review the settings in this file. The file is usually generated by the web-based MediaWiki installer but you might want to tweak some of the parameters, possibly in concert with Apache settings.

Changing a setting usually means changing the value of a PHP variable. You might want to make yourself familiar with the PHP syntax first before going ahead. As a rule of thumb, keep in mind that PHP variables are accessed by prepending a "$" character before the variable name; many variables are simply set to either  or.

Your changes will be in effect immediately after saving the file: there is no need to manually "restart" anything. In some cases you may need to clear your browser's cache to see changes.

The default values of many more settings are set in includes/DefaultSettings.php, which should not be edited; if the variable you want to change is not already mentioned in your LocalSettings.php, copy the appropriate line from DefaultSettings and modify it appropriately. Within LocalSettings.php you could add new lines at the end. All such lines should certainly appear below the line which says 'require_once( "includes/DefaultSettings.php" );'

Within the file, there can also be several lines such as 'require_once( "extensions/extension.php" );', which link to other extensions enabled on the wiki. Those extensions may require setting the values of more variables in LocalSettings.php; check the extension's documentation for further instructions.

See the configuration settings index and the comments included in the settings files for help on what all the variables do. A short listing of the most important variables, as well as the most requested features, is listed below.

If you have a wiki on a MediaWiki wiki farm you may not have write-access (perhaps not even read-access) to the file LocalSettings.php (see e.g.). The wiki farm company may or may not be willing to make changes you desire. Perhaps it wants to keep most settings the same on all wikis of the wiki farm.

Database settings
MediaWiki needs access to the database (currently either MySQL or PostgreSQL) to store pages, modifications, user information, and a lot more things.

The $wgDBserver contains the hostname where the database is hosted on. In most cases this will be just "localhost" as the database is run on the same system, but for distributed installations, you need to fill in the fully qualified domain name of the computer running the database.

$wgDBname is the database name of the database to be used by MediaWiki. A single MySQL or PostgreSQL installation can store more than one database and you can even run many MediaWiki installations on a single server. Make sure you have stated the correct database name here and use different database names for different wiki installations on the same database server.

The $wgDBuser and $wgDBpassword variables contain the login name and password to be used by MediaWiki to access the database. Make sure the specified user has the proper access rights to be able to manipulate the wiki's table on the database server.

Also keep in mind that the LocalSettings.php permissions should not allow other users to view this file as it contains security-related data.

User rights
The $wgGroupPermissions is an associative array, controlling permissions for creating and editing pages for your different user groups. In this array, custom permission levels can be created, and permission levels for the different user groups can be set. See Help:User rights for more information about the different permissions and user groups available.

Force capital links
By default, no page name can start with a lowercase Roman letter: in an attempt to do so the first letter is converted to uppercase; if a link target, included page, image or category is specified with a name starting with a lowercase letter, the actual target etc. is the page starting with the corresponding capital.

Alternatively page names can start with a lowercase letter, in addition to the possibilities of starting with a capital, a digit, etc. For that you must adjust the $wgCapitalLinks variable. Setting it to false allows lowercase characters, true chooses the default behaviour.

Enabling subpages
Subpages are enabled on a per-namespace basis using the $wgNamespacesWithSubpages variable. For example, to enable subpages in the main namespace:

$wgNamespacesWithSubpages[NS_MAIN] = 1;

Image uploads
Before users are allowed to upload files to the MediaWiki system, you have to enable that feature. Make sure the Upload Directory is properly configured and writeable by the Apache web server process. Then set the $wgEnableUploads variable to true to allow uploading in the web user interface.

i.e. Here's some example code from includes/DefaultSettings.php to put in LocalSettings.php. $wgUploadPath      = "$wgScriptPath/uploads";      ## Wiki 1.5 defaults to /images, but allows more than just images $wgUploadDirectory = "$IP/uploads";                ## Wiki 1.5 defaults to /images, but allows more than just images

$wgEnableUploads      = true;
 * 1) To enable image uploads, make sure the above '$wgUploadPath' directory is writable by Apache User or group.
 * 2) (i.e.  chmod og+w uploads images)  then the following should be true:

$wgUseImageResize     = true; $wgUseImageMagick     = true; $wgImageMagickConvertCommand = "/usr/bin/convert";

$wgHashedUploadDirectory = false; If you want to be able to resize images on the fly to support thumbnails, MediaWiki needs a working ImageMagick installation. Set the $wgUseImageResize and $wgUseImageMagick variables to true once you have installed and tested ImageMagick on your system. Make sure the $wgImageMagickConvertCommand variable points to the proper location of the convert command of your installation and that the command is executable by the web server process.
 * 1) If you want to use image uploads under safe mode, create the directories images/archive, images/thumb and
 * 2) images/temp, and make them all writable. Then uncomment this, if it's not already uncommented:

Also, you may want to modify the list of accepted extensions, which is stored within the $wgFileExtensions array: $wgFileExtensions = array('png','jpg','jpeg','ogg','doc','xls','ppt','mp3','sxc','pdf','nse');

In case you run into trouble with ImageMagick, and obtain the following error message:
 * Fatal error: mime_magic could not be initialized, magic file is not available in includes/MimeMagic.php on line 506</tt>

Try adding the following line to LocalSettings.php: $wgMimeDetectorCommand = "file -bi";

See also: Manual:Configuring file uploads, Manual:Mime type detection, and Manual:Image thumbnailing

LaTeX inline equations
In order to render mathematical formulae in LaTeX, you need a working LaTeX installation on your system. Set the $wgUseTeX variable to true to enable that feature. Also make sure the $wgMathPath, $wgMathDirectory and $wgTmpDirectory are set properly, but you might want to go with the default values unless you have a very good reason to change it.

Interwiki support
InterWiki support is built into MediaWiki but you need to configure the prefix to be used for your internal links. This prefix is usually the same as $wgSitename, but in case you need to change that, you set the $wgLocalInterwiki variable to the preferred name.

Language of user interface
MediaWiki allows for a variety of localized user interfaces languages instead of the english default. If you want to run your wiki in a non-English language, set the $wgLanguageCode variable to the proper language code (e.g. "de" for German, "es" for Spanish, etc.)

You may use any of the languages found in the directory language. E.g., if you find MessagesEs.php, you can use " " for Spanish. Do not use " " with a capital letter. Although it seems to work, not all texts are translated.

Note: After changing the language code, you will need to run a php script to make it work. With your command line tool, go to your wiki directory, open the "maintenance" folder, and type " ". Please note that on Windows, the PHP folder might not be included in the PATH environment variable.

Setting copyright for the site

 * $wgRightsPage is the page on the wiki that covers the copyrights that it falls under. Usually, this will be Project:Copyrights.
 * $wgRightsText is the text in the footer that follows "Content is available under". It will be linked to the page specified in.
 * $wgRightsIcon is the URL of the image placed at the left of the footer.
 * $wgRightsUrl is the page describing full details of your license. (For the GNU FDL, for example, this would be .)
 * Note: If  is non-empty, the link in the copyright/license notice will link to that page on your site. If   is empty then the copyright/license notice will link to   instead.
 * $wgEnableDublinCoreRdf and $wgEnableCreativeCommonsRdf to add RDF meta data to wiki pages. For more details about RDF metadata see RDF_metadata.

To modify the copyright statements of the site, add something like this to LocalSettings.php:

$wgRightsPage = "YourWiki:Copyright"; $wgRightsText = "copyright YourWiki";

Afterwards, edit MediaWiki:Copyright to provide an appropriate message, using  to indicate the position where the link to your copyright page will be.

Example: setting a Creative Commons license

To set a Creative Commons license do the following:


 * Choose your license: http://creativecommons.org/text/publish-website
 * Examine the returned HTML code, e.g.:

<a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/2.5/"> <img alt="Creative Commons License" border="0" src="http://creativecommons.org/images/public/somerights20.png" /> </a> This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/2.5/"> Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License</a>.

$wgRightsUrl = "http://creativecommons.org/licenses/by-nc-sa/2.5/"; $wgRightsText = "a Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License"; $wgRightsIcon = "http://creativecommons.org/images/public/somerights20.png";
 * For  enter the href info from the first anchor:
 * For  enter the text the second anchor links from (add the "a" to the Wiki variable for a more grammatically correct version)
 * For  enter the src info from the img link in the first anchor. You want to copy the badge to your own site instead of using the one from the Creative Commons site.

$wgEnableCreativeCommonsRdf = true; $wgEnableDublinCoreRdf = true;
 * For using RDF metadata about copyright add one or both of the following lines to your LocalSettings.php

Custom namespaces
By declaring the $wgExtraNamespaces array, and modifying the $wgNamespacesWithSubpages, and $wgNamespacesToBeSearchedDefault arrays, extra namespaces can be added to a MediaWiki installation. See Custom namespaces for more information as to how to do so.

Skins
The default skin of the site can be modified via the $wgDefaultSkin variable.