This extension hook has no documentation on MediaWiki.org. Please improve MediaWiki by adding documentation to it. See Template:ExtensionHook for instructions on how to do it.

For examples of extensions using this hook, see Category:SemanticSignupUserSignupSpecial extensions . Category:Extension hooks#SemanticSignupUserSignupSpecial Category:Undocumented extension hooks#SemanticSignupUserSignupSpecial Category:Extension hooks provided by Semantic Signup Category:Extension hooks#SemanticSignupUserSignupSpecial Category:Undocumented extension hooks#SemanticSignupUserSignupSpecial Category:Extension hooks provided by Semantic Signup