Extension:MassEditRegex

This extension allows administrators to perform a single edit across multiple pages in one step, by running a regular expression over the content of each page. This is well suited to performing simple edits such as renaming a template, adding pages to a category, or correcting typos (all of which can be done in the same edit operation by supplying multiple regular expressions.)

Usage
Once the extension has been installed and permission masseditregex to use MassEditRegex has been given, go to Special:MassEditRegex and fill out the edit form (see screenshot).

Features

 * Transform each page using one or more regular expressions in a single step
 * Edits appear as "bot" so they don't show up in the normal edit list (unless the user chooses to show bot edits)
 * Only users with the masseditregex permission can perform changes
 * A new 'edit all' tab appears on category pages and on Special:WhatLinksHere, for editing all listed pages at once
 * Pages to edit can be specified as:
 * A list of page names
 * A list of page name prefixes (e.g. "Test" will match pages called "Testing" and "Tested")
 * A list of categories (all pages within the categories will be edited)
 * A list of backlinks (pages edited are those linking to the ones in the list)

Requirements

 * MediaWiki 1.21 or newer.
 * Familiarity with regular expressions.

Setup
Add the following to LocalSettings.php:

Bugs / Known Issues

 * Depending on your webserver's PHP config, scripts may time out after 30 seconds or less. In this case you will need to check your contributions page to see which articles have been edited and remove those from the list before performing the edit again.

Troubleshooting

 * If you get an error or a blank page when applying your edits, an error has probably occurred, most likely from trying to edit too many pages in one go. Until this is fixed, try splitting the edit into two or more smaller groups of pages.