Manual:$wgArticlePath

Server URLs and file paths: $wgArticlePath
The base URL used to create article links.
Introduced in version:pre 1.1.0
Removed in version:still in use
Allowed values:(relative or absolute URL, with '$1' to represent page title. If you use a relative URL, it must start with a slash (/).)
Default value:{$wgScript }?title=$1, or {$wgScript}/$1 depending on value of $wgUsePathInfo
(Note: The default value of this variable depends on other variables, such as the values set in Setup.php , after LocalSettings.php is executed)

Details edit

This is the base URL that will be used to construct all internal links within MediaWiki. The default value points it to the main index.php script using a relative URL, but if you are using .htaccess for pretty URLs, this can be altered as required.

Example edit

$wgArticlePath = '/wiki/$1';

See also edit