Help:Extension:GlobalUserPage

The GlobalUserPage extension lets you reuse the same user page across multiple wikis in a wikifarm.

Usage

 * 1) Create a user page at the central wiki. (That's Meta on Wikimedia Foundation wikis.)
 * 2) If Extension:GlobalPreferences is installed, go to the Special:GlobalPreferences and enable the "Use global user page" and "Use this preference on all wikis" checkboxes. This step isn't needed if the wiki has the feature enabled by default (like on Wikimedia wikis).

The global user page will now appear on all wikis. If you want to replace an existing local page with the global page, you'll need to request the deletion of the local page. See Help:Deleting a page for details, or contact a local administrator.

Interwiki links
Links will be rendered locally, so you should use interwiki links for everything. For example, always use  to link to anything on meta wiki; always use   to link to anything on English Wikipedia; always use   to link to anything on German Wikiquote.

Controlling what content is displayed
Just like transcluding a template, you can use the  and   tags to control what content is displayed only locally, or only globally.

You can "opt out" of global user pages by simply wrapping your central user page in  tags.

Caveats

 * Your user page might not look the same on other wikis due to differences in their site CSS.
 * You can use the  parser function to show system messages in the reader's language (like a normal page), but the message content will come from the central wiki.
 * Parser functions like  or trying to transclude Special:RecentChanges won't invalidate caches properly.