Manual:Configuration settings (alphabetical)

This is an index of all supported configuration options based on the file.

Never edit ; copy appropriate lines to   instead and amend them as appropriate.

This index is in alphabetical order (ignoring the $wg prefix). Note that the only setting without this prefix is $IP, which is listed under I.


 * Listed alphabetically | Listed by function | Category:MediaWiki configuration settings

A

 * $wgAccountCreationThrottle - Number of accounts each IP address may create, 0 to disable. Requires memcached.
 * $wgActionPaths - Paths for various user actions. Used to 'pretty' URLs.
 * $wgActiveUserDays - The number of days a person must make edits to be considered an "active" user
 * $wgActiveUserEditCount - The number of edits a person must make to be considered an "active" user
 * $wgAddGroups - allow finer control over usergroup assignment.
 * $wgAdvancedSearchHighlighting - Set to true to have nicer highligted text in search results.
 * $wgAjaxExportList - List of functions in AjaxFunctions.php that are callable via action=ajax.
 * $wgAjaxLicensePreview - Allow preview licences during upload via AJAX.
 * $wgAjaxSearch - Enables search-suggestions.
 * $wgAjaxUploadDestCheck - Enable AJAX check for file overwrite, pre-upload.
 * $wgAjaxWatch - Enable watching/unwatching pages using AJAX.
 * $wgAllDBsAreLocalhost - Make all database connections secretly go to localhost. Useful for debugging.
 * $wgAllowCategorizedRecentChanges - Allow to filter the recent changes by a category or one of its sub(subsubsub...)categories
 * $wgAllowCopyUploads - Allow uploads from URLs as well as local files.
 * $wgAllowDisplayTitle - Allows use of DISPLAYTITLE magic word.
 * $wgAllowExternalImages - Whether to allow inline image pointing to other websites.
 * $wgAllowExternalImagesFrom - If $wgAllowExternalImages is false, you can specify an exception here.
 * $wgAllowImageMoving - Allow to move images, experimental
 * $wgAllowPageInfo - Allow the "info" action, very inefficient at the moment.
 * $wgAllowRealName - Whether or not to allow real name fields.
 * $wgAllowSlowParserFunctions - Allow other parser functions like "pagesinnamespace".
 * $wgAllowSpecialInclusion - Allow special page inclusions such as.
 * $wgAllowTitlesInSVG - If true, will be allowed in files with an "image/svg" MIME type.
 * $wgAllowUserCss - Allow user Cascading Style Sheets (CSS)
 * $wgAllowUserJs - Allow user Javascript pages
 * $wgAlternateMaster - A map of database name to connection index.
 * $wgAlwaysUseTidy
 * $wgAmericanDates - Enable for English module to print dates as eg 'May 12' instead of '12 May'.
 * $wgAntiLockFlags - Anti-lock flags.
 * $wgAntivirus - Internal name of virus scanner.
 * $wgAntivirusRequired - Determines if a failed virus scan will cause the file to be rejected.
 * $wgAntivirusSetup - Configuration for different virus scanners.
 * $wgAPIListModules - API list module extensions.
 * $wgAPIMaxDBRows - Maximum amount of rows to scan in a DB query in the API.
 * $wgAPIMetaModules - API meta module extensions.
 * $wgAPIModules - API module extensions.
 * $wgAPIPropModules - API prop module extensions.
 * $wgAppleTouchIcon - Optional URL to an icon to use when bookmarking to the home screen on Apple handheld devices.
 * $wgArticlePath - The URL template used to create article links.
 * $wgArticleRobotPolicies - Allow customisation of robot policies on a per-article basis.
 * $wgAuth - Authentication plugin. See AuthPlugin.
 * $wgAutoblockExpiry - Number of seconds before autoblock entries expire
 * $wgAutoConfirmAge - Number of seconds an account is required to age before it's given the implicit 'autoconfirm' group membership. This can be used to limit privileges of new accounts.
 * $wgAutoConfirmCount - Number of edits an account requires before it is autoconfirmed; passing both this AND the time requirement ($wgAutoConfirmAge) is needed
 * $wgAutoloadClasses - Array mapping class names to filenames, for autoloading.
 * $wgAutopromote - Conditions of automatic promotion of user to specific groups.
 * $wgAvailableRights - A list of available rights, in addition to the ones defined by the core.

B

 * $wgBlockAllowsUTEdit - Allow blocked users to edit their talk pages
 * $wgBlockOpenProxies - Automatic open proxy test on edit.
 * $wgBreakFrames - Break out of framesets.
 * $wgBrowserBlackList - Browser Blacklist for unicode non compliant browsers.

C

 * $wgCacheEpoch - Set this to current time to invalidate all prior cached pages.
 * $wgCachePages - Allow client-side caching of pages
 * $wgCacheSharedUploads - Cache shared metadata in memcached.
 * $wgCacheVaryCookies - A list of cookies that vary the cache.
 * $wgCapitalLinks - Set this to false to avoid forcing the first letter of links to capitals.
 * $wgCategoryMagicGallery - On category pages, show thumbnail gallery for images belonging to that category instead of listing them as articles.
 * $wgCategoryPagingLimit - Paging limit for items in categories.
 * $wgCategoryPrefixedDefaultSortkey - Apply/remove page prefix (namespace name) at default category sortkey
 * $wgCheckDBSchema
 * $wgCheckFileExtensions - This is a flag to determine whether or not to check file extensions on upload.
 * $wgCheckSerialized - Check if serialised files are up to date.
 * $wgCleanSignatures - If true, removes (substitutes) templates in " ~ " signatures.
 * $wgClockSkewFudge - Helps avoid cache problems due to timer resolution.
 * $wgColorErrors - Whether to color command-line error messages.
 * $wgCommandLineMode - Indicates whether MW is running in command-line mode. Should never be set manually!
 * $wgCommandLineDarkBg
 * $wgCompressRevisions - If this is set on, all future revisions will be compressed on page save, but only if zlib support is available and enabled in PHP.
 * $wgConf - Create a site configuration object. Not used for much in a default install.
 * $wgContentNamespaces - Namespaces which are considered to contain real content, or articles.
 * $wgCookieDomain - Set to set an explicit domain on the login cookies.
 * $wgCookieExpiration - Number of seconds before HTTP cookies expire.
 * $wgCookieHttpOnly - Set authentication cookies to httpOnly to prevent stealing by JS, in browsers that support this feature.
 * $wgCookiePath
 * $wgCookiePrefix - Custom cookie prefix.
 * $wgCookieSecure - Whether cookies are secured.
 * $wgCopyrightIcon - Set this to some HTML to override the rights icon with an arbitrary logo.
 * $wgCountCategorizedImagesAsUsed - On Special:Unusedimages, consider images "used" if they are put into a category.
 * $wgCustomConvertCommand - Use another resizing converter, e.g. GraphicMagick.

D

 * $wgDBadminpassword - The password for $wgDBadminuser.
 * $wgDBadminuser - Database username used by the maintenance scripts.
 * $wgDBAvgStatusPoll - Time before the server get a SHOW STATUS query under overload conditions.
 * $wgDBClusterTimeout - When to give error messages.
 * $wgDBerrorLog - File to log MySQL errors to.
 * $wgDBmwschema - Schema that Postgres stores the MediaWiki tables in. Defaults to 'mediawiki'
 * $wgDBmysql5 - Set to true to set MySQL connection into UTF-8 encoding
 * $wgDBname - Name of the database.
 * $wgDBpassword - The password for $wgDBuser.
 * $wgDBport - Database port.
 * $wgDBprefix - Table name prefix.
 * $wgDBserver - Database host name or ip address.
 * $wgDBservers - Database load balancer.
 * $wgDBTableOptions - MySQL table options to use during installation or update.
 * $wgDBtransactions - Set to true if using InnoDB tables.
 * $wgDBts2schema - Schema that the Tsearch2 tables live in for Postgres. Defaults to 'public'
 * $wgDBtype - Type of database.
 * $wgDBuser - Database username.
 * $wgDebugComments
 * $wgDebugDBTransactions - Trace lifecycle of the database transaction (opening, commit, rollback)
 * $wgDebugDumpSql
 * $wgDebugFunctionEntry - Output debug message on every wfProfileIn/wfProfileOut
 * $wgDebugLogFile - The file name of the debug log, or empty if disabled. wfDebug appends to this file.
 * $wgDebugLogGroups - Direct wfDebugLog output to file rather than $wgDebugLogFile on a group basis.
 * $wgDebugProfiling - Detects non-matching wfProfileIn/wfProfileOut calls
 * $wgDebugRawPage - Avoid overlapping debug entries by leaving out CSS.
 * $wgDebugRedirects
 * $wgDebugSquid - Lots of debugging output from SquidUpdate.php
 * $wgDebugTidy - Put tidy warnings in HTML comments, only works for internal tidy.
 * $wgDefaultExternalStore - The place to put new revisions.
 * $wgDefaultLanguageVariant - Default variant code, if false, the default will be the language code.
 * $wgDefaultRobotPolicy - Default robots exclusion policy for the wiki.
 * $wgDefaultSkin - The default skin.
 * $wgDefaultUserOptions - Settings added to this array will override the language globals for the user preferences used by anonymous visitors and newly created accounts.
 * $wgDeleteRevisionsLimit - Integer of how many revisions an article must have before the bigdelete right is required to delete it.
 * $wgDiff - Path to the GNU diff utility.
 * $wgDiff3 - Path to the GNU diff3 utility.
 * $wgDirectoryMode - Default value for chmoding of new directories.
 * $wgDisableAnonTalk - Disable talk pages for anonymous users (IPs).
 * $wgDisableCookieCheck
 * $wgDisableCounters
 * $wgDisabledActions - Array of disabled article actions, e.g. view, edit, dublincore, delete, etc.
 * $wgDisableHardRedirects - Disable redirects to special pages and interwiki redirects, which use a 302 and have no "redirected from" link.
 * $wgDisableInternalSearch - Disable internal search so that extensions can implement it.
 * $wgDisableLangConversion - Whether to enable language variant conversion.
 * $wgDisableOutputCompression - Disable output compression (enabled by default if zlib is available).
 * $wgDisableQueryPages - Disable all query pages if miser mode is on, not just some.
 * $wgDisableQueryPageUpdate - Array of special pages that should not be updated.
 * $wgDisableSearchContext
 * $wgDisableSearchUpdate - If you've disabled search semi-permanently, this also disables updates to the table.
 * $wgDisableTextSearch - Disables full text search.
 * $wgDisableTitleConversion - Whether to enable language variant conversion for links.
 * $wgDjvuDump - Path of the djvudump executable.
 * $wgDjvuOutputExtension - File extension for the DJVU post processor output.
 * $wgDjvuPostProcessor - Path of the DJVU post processor.
 * $wgDjvuRenderer - Path of the ddjvu DJVU renderer.
 * $wgDjvuToXML - Path of the djvutoxml executable.
 * $wgDocType - The doc type to use in the  declaration.
 * $wgDTD

E

 * $wgEditEncoding
 * $wgEditPageFrameOptions - Control framing of wiki pages globally.
 * $wgEmailAuthentication - Whether Email authentication (confirmation) is needed for that wiki for using any Email function (except password reminder which works independently from this setting)
 * $wgEmailConfirmToEdit - Require a confirmed address to edit pages (for version 1.6 and newer)
 * $wgEmergencyContact - Site admin email address
 * $wgEnableAPI - Enable direct access to the data API through api.php.
 * $wgEnableCascadingProtection - Enable cascade protection.
 * $wgEnableCreativeCommonsRdf - Includes licensing information derived from Creative Commons licenses.
 * $wgEnableDnsBlacklist - Use DNS blacklists in $wgDnsBlacklistUrls to check for open proxies.
 * $wgEnableDublinCoreRdf
 * $wgEnableEmail - Set to true to enable the e-mail basic features: Password reminders, etc.
 * $wgEnableImageWhitelist - Enable an on-wiki image whitelist at MediaWiki:External image whitelist if $wgAllowExternalImages is false.
 * $wgEnableMWSuggest - Enable suggestions while typing in search boxes.
 * $wgEnableParserCache - Keep parsed pages in a cache (objectcache table, turck, or memcached) to speed up output of the same page viewed by another user with the same options.
 * $wgEnableScaryTranscluding - Enable scary transclusion (transcluding from another wiki)
 * $wgEnableSidebarCache
 * $wgEnableSorbs - Use http.dnsbl.sorbs.net to check for open proxies.
 * $wgEnableUploads - Set to true to allow logged-in users to upload files.
 * $wgEnableUserEmail - Set to true to enable user-to-user e-mail.
 * $wgEnableWriteAPI - Allow the API to be used to perform write operations (page edits, rollback, etc.) when an authorised user accesses it.
 * $wgEnotifFromEditor - Email notifications appear to be coming from the page editor (not from Wiki server)
 * $wgEnotifImpersonal - Send a generic mail instead of a personalised mail for each user.
 * $wgEnotifMaxRecips - Maximum number of users to mail at once when using impersonal mail.
 * $wgEnotifMinorEdits - Email notifications also for "minor edits" (user preference is shown and user needs to opt-in)
 * $wgEnableNewpagesUserFilter - Enable user search in Special:Newpages.
 * $wgEnotifRevealEditorAddress - reply-to address of Email notifications may be filled with page editor's address (user preference is shown and user needs to opt-in)
 * $wgEnotifUseJobQ - Send mails via the job queue.
 * $wgEnotifUserTalk - Email notifications can be sent for first change on a user_talk page (user preference is shown and user needs to opt-in)
 * $wgEnotifWatchlist - Email notifications can be sent for the first change on watched pages (user preference is shown and user needs to opt-in)
 * $wgExceptionHooks - Hooks that are used for outputting exceptions.
 * $wgExemptFromUserRobotsControl - An array of namespace keys in which the __INDEX__/__NOINDEX__ magic words will not function.
 * $wgExpensiveParserFunctionLimit - Maximum number of calls per parse to expensive parser functions such as PAGESINCATEGORY.
 * $wgExportAllowHistory - Enable the full-history option on Special:Export.
 * $wgExportAllowListContributors
 * $wgExportMaxHistory - Special:Export requests for history of pages with more revisions than this will be rejected.
 * $wgExtensionAliasesFiles - Aliases for special pages provided by extensions.
 * $wgExtensionCredits -
 * $wgExtensionMessagesFiles - Extension messages files.
 * $wgExtensionFunctions - Global list of extension credits
 * $wgExternalDiffEngine - Name of the external diff engine to use.
 * $wgExternalLinkTarget - Set a default target for external links.
 * $wgExternalServers - An array of external MySQL servers.
 * $wgExternalStores - External stores allow including content from non database sources following URL links.
 * $wgExtraLanguageNames - List of language names or overrides for default names in Names.php.
 * $wgExtraNamespaces - Additional namespaces.
 * $wgExtraRandompageSQL - Filter for Special:Randompage. Part of a WHERE clause.
 * $wgExtraSubtitle - The subtitle to appear under every title.

F

 * $wgFavicon - The URL of the site favicon.
 * $wgFeed - Toggle syndication feeds on and off.
 * $wgFeedCacheTimeout - 'Minimum'' timeout for cached Recentchanges feed, in seconds.
 * $wgFeedDiffCutoff - When generating Recentchanges RSS/Atom feed, diffs will not be generated for pages larger than this size.
 * $wgFeedLimit - Set maximum number of results to return in syndication feeds (RSS, Atom) for eg Recentchanges, Newpages.
 * $wgFetchCommonsDescriptions - Whether to fetch commons image description pages and display them on the local wiki.
 * $wgFileBlacklist - Files with these extensions will never be allowed as uploads.
 * $wgFileCacheDirectory - This is the directory where cached page will be saved when using file caching.
 * $wgFileExtensions - This is the list of preferred extensions for uploading files. Uploading files with extensions not in this list will trigger a warning.
 * $wgFileStore - File storage paths; currently used only for deleted files.
 * $wgFilterCallback - Similarly (to $wgSpamRegex) if this function returns true
 * $wgForceUIMsgAsContentMsg
 * $wgForcedRawSMaxage - Default maximum age for raw CSS/JS accesses.
 * $wgForeignFileRepos - An array of repository structure for foreigns repositories.

G

 * $wgGenerateThumbnailOnParse - Allow thumbnail rendering on page view.
 * $wgGitRepositoryViewers - Map GIT revision numbers and repository URLs to their respective gitweb URLs in Special:Version
 * $wgGoToEdit - Go button goes straight to the edit screen if the article doesn't exist
 * $wgGrammarForms - Used for parser function.
 * $wgGroupPermissions - Use this to set access rights for groups and users.
 * $wgGroupsAddToSelf - allow users to add themselves from specified groups via Special:Userrights
 * $wgGroupsRemoveFromSelf - allow users to remove themselves from specified groups via Special:Userrights+

H

 * $wgHandheldForIPhone - If set, 'screen' and 'handheld' media also apply to the iPhone/iPod Touch Mobile Safari.
 * $wgHandheldStyle - Style for media="handheld".
 * $wgHashedSharedUploadDirectory - Whether to hash the shared upload directory.
 * $wgHashedUploadDirectory - If true, use the /a/ab/foo.png directory structure.
 * $wgHideInterlanguageLinks - Hide interlanguage links from the sidebar.
 * $wgHitcounterUpdateFreq - Sets how often page counters should be updated.
 * $wgHooks - Global list of hooks.
 * $wgHTCPMulticastAddress - Not used yet. Commented out.
 * $wgHTCPMulticastTTL
 * $wgHTCPPort
 * $wgHttpOnlyBlacklist - User agent blacklist for HttpOnly mode.
 * $wgHTTPProxy - Proxy to use for CURL requests.
 * $wgHTTPTimeout - Timeout for HTTP requests done via CURL.

I

 * $wgIgnoreImageErrors - If true, inline scaled images will still produce tags ready for output instead of showing an error message.
 * $wgIllegalFileChars - Override the default list of illegal characters in file names.
 * $wgImgAuthDetails - Display reason access to uploaded file was denied to users(img_auth only)
 * $wgImgAuthPublicTest - Test to see if img_auth set up correctly (img_auth only)
 * $wgImageLimits - Limit images on image description pages to a user-selectable limit.
 * $wgImageMagickConvertCommand - Set to the command used to evoke ImageMagick.
 * $wgImplicitGroups - Array of groups that aren't shown on e.g. Special:Listusers.
 * $wgImportSources - List of interwiki prefixes for wikis we'll accept as sources for Special:Import (for sysops).
 * $wgImportTargetNamespace - Optional default target namespace for interwiki imports.
 * $wgInputEncoding - The encoding of the input text.
 * $wgInternalServer - Internal server name as known to Squid, if different.
 * $wgInterwikiCache
 * $wgInterwikiExpiry - Expiry time for cache of interwiki table.
 * $wgInterwikiFallbackSite
 * $wgInterwikiMagic - Treat language links as magic connectors, not inline links.
 * $wgInterwikiScopes
 * $IP - The filesystem installation directory. Not in DefaultSettings.php.

J

 * $wgJsMimeType - Select which media type (MIME type) to use for JavaScript
 * $wgJobClasses - Maps jobs to their handling classes.
 * $wgJobRunRate - Speed of the background task job queue (e.g. update of links)

L

 * $wgLanguageCode - Site language code. Should be one of the ./language/Language(.*).php files.
 * $wgLBFactoryConf - Load balancer factory configuration.
 * $wgLegacyEncoding - Set this to eg 'ISO-8859-1' to perform character set conversion when loading old revisions not marked with "utf-8" flag.
 * $wgLegalTitleChars - Override the default list of illegal characters in page titles.
 * $wgLegacySchemaConversion - Option to speed up the conversion step for large sites when migrating the schema from 1.4 to 1.5
 * $wgLinkCacheMemcached - Cache links using object cache setting (memcache, Turck MMCache, eAccelerator, etc.)
 * $wgLivePreview - Experimental preview feature to fetch rendered text over an XMLHttpRequest from JavaScript.
 * $wgLoadFileinfoExtension - Switch for loading the FileInfo extension by PECL at runtime.
 * $wgLocalDatabases - Other wikis on this site, can be administered from a single developer account.
 * $wgLocalFileRepo - A single repository structure for the local repository.
 * $wgLocalInterwiki - The Interwiki prefix of this wiki. It should always be changed in LocalSettings.php.
 * $wgLocalMessageCache - Directory for local copy of message cache, for use in addition to memcached.
 * $wgLocalMessageCacheSerialized - Defines format of local cache.
 * $wgLocaltimezone - Fake out the timezone that the server thinks it's in.
 * $wgLocalTZoffset - add a distance to the timezone of the server
 * $wgLogActions - Lists the message key string for formatting individual events of each type and action when listed in the logs.
 * $wgLogActionsHandlers - Same as $wgLogActions, but values are functions callbacks.
 * $wgLogHeaders - Lists the message key string for descriptive text to be shown at the top of each log type.
 * $wgLoginLanguageSelector - Show a bar of language selection links in the user login and user registration forms.
 * $wgLogNames - Lists the message key string for each log type.
 * $wgLogRestrictions
 * $wgLogTypes - List of log types.
 * $wgLogo - The URL of the site logo.
 * $wgLogQueries

M

 * $wgMainCacheType - Replaces $wgUseMemCached.
 * $wgMasterWaitTimeout - How long to wait for a slave to catch up to the master.
 * $wgMathDirectory - The file system path of the directory containing LaTeX math images.
 * $wgMathPath - The URL base of the directory containing LaTeX math images.
 * $wgMaxArticleSize - Maximum article size in kilobytes.
 * $wgMaxCredits - Set this to the number of authors that you want to be credited below an article text.
 * $wgMaxImageArea - Don't thumbnail an image if it will use too much working memory.
 * $wgMaximumMovedPages - Maximum number of pages to move at once when moving subpages with a page.
 * $wgMaxMsgCacheEntrySize - Maximum entry size in the message cache, in bytes.
 * $wgMaxNameChars - Maximum number of bytes in username.
 * $wgMaxPPExpandDepth - Stack depth limit for expansion with the preprocessor.
 * $wgMaxPPNodeCount - A complexity limit on template expansion.
 * $wgMaxRedirectLinksRetrieved - Maximum number of links to a redirect page listed on Special:Whatlinkshere/RedirectDestination.
 * $wgMaxRedirects - Max number of redirects to follow when resolving redirects.
 * $wgMaxShellFileSize - Maximum file size created by shell processes under linux, in KB.
 * $wgMaxShellMemory - Maximum amount of virtual memory available to shell processes under linux, in KB.
 * $wgMaxSigChars - Maximum customized signature length.
 * $wgMaxSquidPurgeTitles - Maximum number of titles to purge in any one client operation
 * $wgMaxTemplateDepth - Maximum recursion depth for templates within templates.
 * $wgMaxTocLevel - Maximum indent level of toc.
 * $wgMaxUploadSize - Maximum size of uploaded files.
 * $wgMediaHandlers - Plugins for media file type handling.
 * $wgMemCachedDebug - Will be set to false in Setup.php, if the server isn't working.
 * $wgMemCachedPersistent
 * $wgMemCachedServers
 * $wgMessageCacheType - Message cache setting.
 * $wgMetaNamespace - The name used for the meta-namespace.
 * $wgMetaNamespaceTalk - The name used for the meta-namespace talk pages.
 * $wgMimeDetectorCommand - Sets an external mime detector program.
 * $wgMimeInfoFile - Sets the mime type info file to use by MimeMagic.php.
 * $wgMimeType - The type to send in the  header.
 * $wgMimeTypeBlacklist - Files with these mime types will never be allowed as uploads if $wgVerifyMimeType is enabled.
 * $wgMimeTypeFile - Sets the mime type definition file to use by MimeMagic.php.
 * $wgMinimalPasswordLength - Specifies the minimal length of a user password.
 * $wgMiserMode - If true, disable database-intensive features
 * $wgMsgCacheExpiry - When a message in cache expires (in seconds).
 * $wgMWSuggestTemplate - Template for internal MediaWiki suggestion engine.

N

 * $wgNamespaceAliases - override default names for namespaces
 * $wgNamespaceRobotPolicies
 * $wgNamespaceProtection - Set the minimum permissions required to edit pages in each namespace. If you list more than one permission, a user must have all of them to edit pages in that namespace.
 * $wgNamespacesToBeSearchedDefault - Which namespaces should be searched?
 * $wgNamespacesWithSubpages - Which namespaces should support subpages?
 * $wgNoFollowLinks - If true, external URL links in wiki text will be given the  attribute.
 * $wgNoFollowNsExceptions - Namespaces in which $wgNoFollowLinks doesn't apply.
 * $wgNonincludableNamespaces - Pages in namespaces in this array can not be used as templates.
 * $wgNoReplyAddress - Dummy address which should be accepted during mail send action.

O

 * $wgOpenSearchTemplate - Template for OpenSearch suggestions.
 * $wgOutputEncoding - The encoding of the output text.
 * $wgOverrideSiteFeed - Override the site's default rss/atom feed that appears on every page.

P

 * $wgPagePropLinkInvalidations - Page property link table invalidation lists.
 * $wgPageShowWatchingUsers - Show watching users in Page views.
 * $wgParserCacheExpireTime
 * $wgParserCacheType - Parser cache setting.
 * $wgParserConf - Parser configuration.
 * $wgParserOutputHooks - Parser output hooks.
 * $wgParserTestFiles - Parser test suite files to be run by parserTests.php.
 * $wgPasswordAttemptThrottle - Limit password attempts per IP per address.
 * $wgPasswordReminderResendTime - Minimum time, in hours, which must elapse between password reminder.
 * $wgPasswordSalt - For compatibility with old installations set to false.
 * $wgPasswordSender - Password reminder email address.
 * $wgPasswordSenderName - Password reminder ($wgPasswordSender) name
 * $wgProfileCallTree - If true, print a raw call tree instead of per-function report
 * $wgProfileLimit - Only record profiling info for pages that took longer than this
 * $wgProfileOnly - Don't put non-profiling info into log file
 * $wgProfilePerHost - Should application server host be put into profiling table?
 * $wgProfileToDatabase - Log sums from profiling into "profiling" table in db.
 * $wgProfiling - Enable for more detailed by-function times in debug log
 * $wgProto - The secure server prefix.
 * $wgProxyList - Big list of banned IP addresses. In the keys not the values.
 * $wgProxyMemcExpiry
 * $wgProxyPorts
 * $wgProxyScriptPath
 * $wgProxyWhitelist - Proxy whitelist, list of addresses that are assumed to be non-proxy despite what the other methods might say
 * $wgPutIPinRC - Log IP addresses in the recentchanges table.

Q

 * $wgQueryCacheLimit - Number of rows to cache in 'querycache' table when miser mode is on.
 * $wgQueryPageDefaultLimit - Default number of entries to show on query pages.

R

 * $wgRateLimitsExcludedGroups - Array of groups which should never trigger the rate limiter.
 * $wgRateLimitLog - Set to a filename to log rate limiter hits.
 * $wgRateLimits - Simple rate limiter options to brake edit floods.
 * $wgRawHtml - Allow raw, unchecked HTML in ... sections.
 * $wgRC2UDPAddress -Address used.
 * $wgRC2UDPOmitBots - Omit bot.
 * $wgRC2UDPPort - Port used.
 * $wgRC2UDPPrefix - Prefix used.
 * $wgRCChangedSizeThreshold - Highlight character count difference lower than this.
 * $wgRCFilterByAge - Filter $wgRCLinkDays by $wgRCMaxAge to avoid showing links for numbers higher than what will be stored.
 * $wgRCLinkDays - Days limit.
 * $wgRCLinkLimits - Changes limit.
 * $wgRCMaxAge - Recentchanges items are periodically purged; entries older than this many seconds will go.
 * $wgRCShowChangedSize - Show the amount of changed characters in recent changes.
 * $wgRCShowWatchingUsers - Show watching users in recent changes, watchlist and page history views.
 * $wgReadOnly - Disallows editing, displaying the string given as the reason.
 * $wgReadOnlyFile - If this file is found, the database is locked for the reason given in the contents of the file.
 * $wgRequirePasswordforEmailChange - Whether the user must enter their password to change their e-mail address
 * $wgRedirectOnLogin - Redirect users to a specific page on login.
 * $wgRedirectScript - The URL of redirect.php, needed for backwards compatibility.
 * $wgRedirectSources - Regular expression to restrict URLs which will be displayed as 'redirected from' links.
 * $wgRemoteUploads - Set to true to enable the upload link while local uploads are disabled.
 * $wgRemoveGroups - allow finer control over usergroup assignment.
 * $wgRepositoryBaseUrl - Base URL for a repository wiki.
 * $wgReservedUsernames - List of account names that cannot exist.
 * $wgRestrictionLevels - Set of permission keys that can be selected on the 'page protection' page.
 * $wgRestrictionTypes - Actions that can be restricted.
 * $wgRevisionCacheExpiry - Cache extracted revision text in MemCached.
 * $wgRightsIcon - Copyright icon
 * $wgRightsPage - Page describing the site license
 * $wgRightsText - Text describing the site license
 * $wgRightsUrl - URL describing the site license

S

 * $wgSaveDeletedFiles
 * $wgScript - The URL of index.php.
 * $wgScriptExtension - Extension to append to script names by default.
 * $wgScriptPath - The base URL path.
 * $wgSearchForwardUrl - Set this to a URL to forward search requests to some external location.
 * $wgSearchHighlightBoundaries - Regexp to match word boundaries.
 * $wgSearchType - Type of DB search used.
 * $wgSecretKey - This should always be customised in LocalSettings.php
 * $wgServer - The base URL of the server.
 * $wgServerName - The name of the server without the protocol. (eg, "en.wikipedia.org")
 * $wgSessionsInMemcached
 * $wgSessionName - Override to customise the session name.
 * $wgSharedDB - The name of the shared database.
 * $wgSharedPrefix - Prefix to use for the shared database.
 * $wgSharedTables - Tables to use in shared database
 * $wgSharedThumbnailScriptPath - Same as $wgThumbnailScriptPath, but for shared uploads.
 * $wgSharedUploadDBname - DB name with metadata about shared directory.
 * $wgSharedUploadDBprefix - DB prefix for shared image uploads.
 * $wgSharedUploadDirectory - Path on the file system where shared uploads can be found.
 * $wgSharedUploadPath - Full path on the web server where shared uploads can be found.
 * $wgSharpenParameter - Sharpening parameter to ImageMagick.
 * $wgSharpenReductionThreshold - Reduction in linear dimensions below which sharpening will be enabled.
 * $wgShowCreditsIfMax - If there are more than $wgMaxCredits authors, show $wgMaxCredits of them.
 * $wgShowExceptionDetails - If set to true, uncaught exceptions will print a complete stack trace to output.
 * $wgShowEXIF - Show EXIF data.
 * $wgShowHostnames - If set to true, exposes host names through API and HTML comments.
 * $wgShowIPinHeader - Show the IP in the user bar for anonymous users by default.
 * $wgShowSQLErrors - Whether to show "we're sorry, but there has been a database error" pages.
 * $wgShowUpdatedMarker - Show "Updated (since my last visit)" marker in RC view, watchlist and history.
 * $wgSidebarCacheExpiry - Expiry time for the sidebar cache.
 * $wgSitemapNamespaces - Array of namespaces to generate a sitemap or false for all namespaces.
 * $wgSitename - The name of the site. Should be changed
 * $wgSiteNotice - If set, a notice will show up at the top of every page, defined at MediaWiki:Sitenotice, formatted as for any wiki page.
 * $wgSiteSupportPage - A page where you users can receive donations.
 * $wgSkinExtensionFunctions
 * $wgSkipSkin - Specify the name of a skin that should not be presented in the list of available skins.
 * $wgSkipSkins - More of the same as $wgSkipSkin.
 * $wgSlaveLagCritical - If lag is higher than this value, show a more obvious warning than $wgSlaveLagWarning.
 * $wgSlaveLagWarning - If lag is higher than this value, show a warning in some special pages (like watchlist).
 * $wgSMTP - For using a direct (authenticated) SMTP server connection.
 * $wgSorbsUrl - URL to the Sorbs blacklist.
 * $wgSortSpecialPages - Whether or not to sort special pages in Special:Specialpages.
 * $wgSpamRegex - Text matching this regex will be recognised as spam.
 * $wgSpecialPageGroups - List of special pages, followed by what subtitle they should go under at Special:SpecialPages
 * $wgSpecialPages - A list of custom special pages.
 * $wgSpecialVersionShowHooks - Whether to show the contents of $wgHooks in Special:Version.
 * $wgSQLiteDataDir - To override default SQLite data directory.
 * $wgSQLiteDataDirMode - Default directory mode for SQLite data directory on creation.
 * $wgSquidMaxage - Cache timeout for the squid.
 * $wgSquidServers - A list of proxy servers (ips if possible) to purge on changes.
 * $wgSquidServersNoPurge - Same as $wgSquidServers, except they aren't purged.
 * $wgStatsMethod - Destination for wfIncrStats data.
 * $wgStrictFileExtensions - If this is turned off, users may override the warning for files not covered by $wgFileExtensions.
 * $wgStyleDirectory - The file system path to the skins directory.
 * $wgStylePath - The URL of the skins directory.
 * $wgStyleSheetPath - The URL of the directory containing the stylesheets.
 * $wgStyleVersion - Appended in the query string of static CSS and JS to clear client side cache when changing this.
 * $wgSVGConverter - A key from $wgSVGConverters to use as converter.
 * $wgSVGConverterPath - If not in the executable PATH, specify.
 * $wgSVGConverters - Scalable Vector Graphics (SVG) may be uploaded as images.
 * $wgSVGMaxSize - Don't scale a SVG larger than this unless its native size is larger.
 * $wgSysopEmailBans - Allow sysops to ban users from accessing Emailuser.
 * $wgSysopRangeBans - Allow sysops to ban IP ranges
 * $wgSysopUserBans - Allow sysops to ban logged-in users

T

 * $wgTexvc - Location of the texvc binary.
 * $wgThumbLimits - List of image sizes users can pick from.
 * $wgThumbnailEpoch - If rendered thumbnail files are older than this timestamp, they will be rerendered on demand as if the file didn't already exist.
 * $wgThumbnailScriptPath - Give a path here to use thumb.php for thumbnail generation on client request, instead of generating them on render and outputting a static URL.
 * $wgThumbUpright - Adjust width of upright images when parameter 'upright' is used
 * $wgTidyBin - Should be set to the path of the tidy binary.
 * $wgTidyConf - Should be set to the path of the tidy configuration file.
 * $wgTidyInternal - Controls the use of the PECL extension to use an inprocess tidy library instead of spawning a separate program.
 * $wgTidyOpts - Options passed to tidy on the command line.
 * $wgTmpDirectory - The URL of the temporary directory.
 * $wgTranscludeCacheExpiry - Expiry time for interwiki transclusion.
 * $wgTranslateNumerals - For Hindi and Arabic use local numerals instead of Western style (0-9) numerals in interface.
 * $wgTrivialMimeDetection - Switch for trivial mime detection.
 * $wgTrustedMediaFormats - List of trusted media-types and mime types.

U

 * $wgUDPProfilerHost - Host for UDP profiler.
 * $wgUDPProfilerPort - Port for UDP profiler.
 * $wgUniversalEditButton - Enables the UniversalEditButton for browsers that support it.
 * $wgUpdateRowsPerJob - Number of rows to update per job.
 * $wgUpdateRowsPerQuery - Number of rows to update per query.
 * $wgUploadBaseUrl
 * $wgUploadDirectory - The file system path of the upload directory.
 * $wgUploadNavigationUrl - Point the upload navigation link to an external URL.
 * $wgUploadPath - The URL of the upload directory.
 * $wgUploadSizeWarning - Warn if uploaded files are larger than this.
 * $wgUrlProtocols - Defines the protocols which are supported and translated in HTML by the mediawiki parser.
 * $wgUseAjax - Enables search Suggestions.
 * $wgUseAutomaticEditSummaries - Turn off automatic edit summaries.
 * $wgUseCategoryBrowser - Disable experimental dmoz-like category browsing.
 * $wgUseCommaCount - Specifies the criteria used to define a 'valid article' when counting.
 * $wgUseCopyrightUpload - Set this to true if you want detailed copyright information forms on Upload.
 * $wgUseDatabaseMessages - Translation using MediaWiki: namespace.
 * $wgUseDumbLinkUpdate - Do /  for link updates instead of incremental.
 * $wgUseDynamicDates - Enable to allow rewriting dates in page text. DOES NOT FORMAT CORRECTLY FOR MOST LANGUAGES.
 * $wgUseESI - If you run Squid3 with ESI support, enable this.
 * $wgUseETag
 * $wgUseExternalEditor - Activate external editor interface for files and pages.
 * $wgUseFileCache - This will cache static pages for non-logged-in users to reduce database traffic on public sites.
 * $wgUseGzip - Use GZip to store cached pages.
 * $wgUseImageMagick - Resizing can be done using PHP's internal image libraries or using ImageMagick.
 * $wgUseImageResize - Set $wgUseImageResize to true if you want to enable dynamic server side image resizing ("Thumbnails")
 * $wgUseInstantCommons - Enables InstantCommons, a feature that allows to use Wikimedia's Commons images for your wiki.
 * $wgUseMemCached - Use memcache, using the servers set in $wgMemCachedServers.
 * $wgUseNPPatrol - Use new pages patrolling to check for vandalism.
 * $wgUsePathInfo - Whether to use 'pretty' URLs.
 * $wgUseRCPatrol - Use RC Patrolling to check for vandalism
 * $wgUserEmailUseReplyTo - Should the sending user's email be in a Reply-To header instead of From.
 * $wgUsersNotifiedOnAllChanges - Array of usernames who will be sent a notification email for every change which occurs on a wiki.
 * $wgUseSharedUploads - Whether to look in the shared repository if no file of the given name is found in the local repository (for [[Image:..]], [[Media:..]] links).
 * $wgUseSiteCss - Use the site's Cascading Style Sheets (CSS)
 * $wgUseSiteJs - Use the site's Javascript page
 * $wgUseSquid - Enable/disable Squid.
 * $wgUseOldSearchUI - Controls the search screen UI
 * $wgUseTeX - Enables the use of  (TeX) tags.
 * $wgUseTidy - Use tidy to make sure HTML output is sane.
 * $wgUseTrackbacks Enable blog-style trackback links
 * $wgUseZhdaemon - Whether to use zhdaemon to perform Chinese text processing.

V

 * $wgValidateAllHtml - Validate the overall output using tidy and refuse to display the page if it's not valid.
 * $wgValidSkinNames
 * $wgVariantArticlePath - Used for interwiki links.
 * $wgVerifyMimeType - Determines if the mime type of uploaded files should be checked
 * $wgVersion - Contains the current version of MediaWiki, as displayed to the user. You should not change this!

W

 * $wgWantedPagesThreshold - Minimum number of links required before a page is listed on Special:Wantedpages
 * $wgWhitelistRead - Pages anonymous user may see.

X

 * $wgXhtmlDefaultNamespace
 * $wgXhtmlNamespaces - Permit other namespaces in addition to the w3.org default.
 * $wgXMLMimeTypes - An array of XML mime types we can detect via MimeMagic.

Z

 * $wgZhdaemonHost - The host which zhdaemon is on. This is only used if $wgUseZhdaemon is set.
 * $wgZhdaemonPort - The port on $wgZhdaemonHost which zhdaemon is on.