Manual:$wgSpecialPages

Details
$wgSpecialPages stores a list of custom 1>Special:MyLanguage/Manual:Special pages|special pages defined for a MediaWiki installation.

The array is keyed by a non-localized id for the special page.

The values assigned to each key may take one of the following forms:

string: ''' a string containing the name of a subclass of . array: ''' an array where the first element is the name of the subclass and all remaining elements are parameters that should be passed to the constructor of that subclass. callback: ' ( since MW 1.24, )'' expected to return a  instance. Useful for full control over the special page's construction parameters.

For more information, please see SpecialPage.php