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MediaWiki extensions manualManual:Extensions
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Release status:Extension status unmaintained

ImplementationTemplate:Extension#type Special page, Search, Data extraction
DescriptionTemplate:Extension#description Maintains a table with hash values for category intersections within a page to allow searching category intersections
Author(s)Template:Extension#username Magnus Mansketalk
Database changesTemplate:Extension#needs-updatephp Yes
LicenseTemplate:Extension#license GNU General Public License 2.0 or later
Download Template:WikimediaDownload/svn
Hooks usedTemplate:Extension#hook

Translate the CategoryIntersection extension if it is available at translatewiki.net

Check usage and version matrix.

The CategoryIntersection extension provides a special page - Special:CategoryIntersection. You put in a list of categories to this page (separated by newlines), and the extension returns the articles that are in all the categories listed. It stores hashes of what categories a page is in in a separate table in db to (I assume) make things efficient. Somewhat akin to the DynamicPageList extensions (but probably much more efficient).

This extension might not handle a single page being in a large number of categories very well.


To install this extension, do the following:

  • Download and place the file(s) in a directory called CategoryIntersection in your extensions/ folder.
Warning Warning: This may take a long time if you have a lot of pages on your wiki. If you don't do this step, the extension will only find pages that had their categories added after the extension was installed
  • YesY Done - Navigate to Special:Version on your wiki to verify that the extension is successfully installed.