This Lua module is used in system messages, and on approximately 5,200,000 pages, or roughly 8% of all pages. Changes to it can cause immediate changes to the Wikipedia user interface. To avoid major disruption and server load, any changes should be tested in the module's /sandbox or /testcases subpages, or in your own module sandbox. The tested changes can be added to this page in a single edit. Please discuss changes on the talk page before implementing them.

Due to a server limit of 500 "expensive parser function" calls (e.g. #ifexist:, PAGESIZE:, and PAGESINCATEGORY:), this module will only work properly if the page using it has not already exceeded the limit. When the limit is exceeded, the page using this template or module is categorised in Category:Pages with too many expensive parser function calls. (further information)

This module is rated as beta. It is considered ready for widespread use, but as it is still relatively new, it should be applied with some caution to ensure results are as expected.

This module depends on the following other modules: Module:Arguments (sandbox)

This module contains functions to find the target of a redirect page.

The main function accepts the name of a single page. It determines if the page is a redirect; if so it looks up the page, extracts the target, and returns the target name as text. Its usage is {{#invoke:redirect|main|page-name}}. If page-name does not exist or is not a redirect then page-name is returned. If page-name is blank then blank is returned.

The function normally neither takes nor gives square brackets, so to show the result as a link use [[{{#invoke:redirect|main|page-name}}]].

If the parameter bracket is given a nonblank value, brackets will be passed on if present.

• {{#invoke:redirect|main|WP:AFC}} → Wikipedia:Articles for creation
• {{#invoke:redirect|main|[[WP:AFD]]|bracket=yes}} → Wikipedia:Articles for deletion
• {{#invoke:redirect|main|Wikipedia:Articles for deletion}} → Wikipedia:Articles for deletion
• {{#invoke:redirect|main|Red link example}} → Red link example

Note: WP:AFC and WP:AFD are both redirects, but Wikipedia:Articles for deletion is not, and Red link example does not exist. In addition, as a demonstration of redlinks on Wikipedia:Red link, the final page is permanently protected from non-administrator creation.

If you want to use the main function from another Lua module, you may want to use the luaMain function. This provides the same functionality as the main function, but doesn't require that a frame object be available.

To use this, first load the module.

local mRedirect = require('Module:Redirect')

Then use the function with the following syntax:

mRedirect.luaMain(rname, bracket)

rname is the name of the redirect page, and if bracket is anything but false or nil, the module will produce a link rather than just a page name.

The isRedirect function is used from wiki pages to find out if a given page is a redirect or not. If the page is a redirect, the function returns "yes", and if not the output is blank. Its usage is {{#invoke:redirect|isRedirect|page-name}}.

• {{#invoke:redirect|isRedirect|WP:AFC}} → yes
• {{#invoke:redirect|isRedirect|Wikipedia:Articles for deletion}} →
• {{#invoke:redirect|isRedirect|Wikipedia:Articles for rumination}} →

The isRedirect can be accessed from other Lua modules in the same way as the main function:

local mRedirect = require('Module:Redirect')
mRedirect.luaIsRedirect(rname)

The getTarget function fetches the target page name of a redirect page, and is only usable from Lua. If the page specified is a redirect, then the target is returned; otherwise the function returns nil.

To use it, first load the module.

local mRedirect = require('Module:Redirect')

Then use the function with the following syntax:

mRedirect.getTarget(page)

page can be either the name of the redirect page as a string, or a mw.title object.

• phab:T68974 - Provide a standard way to get the target of a redirect page
• mw:Extension:Scribunto/Lua reference manual#Title objects, the Scribunto interface for determining a page's redirect status
• Template:Get QID, which uses this module
• Template:Submit an edit request, which uses this module