Control variable (programming)

Redirect to:

This page is a redirect. The following categories are used to track and monitor this redirect:

With history: This is a redirect from a page containing substantive page history. This page is kept as a redirect to preserve its former content and attributions. Please do not remove the tag that generates this text (unless the need to recreate content on this page has been demonstrated), nor delete this page.
- This template should not be used for redirects having some edit history but no meaningful content in their previous versions, nor for redirects created as a result of a page merge (use {{R from merge}} instead), nor for redirects from a title that forms a historic part of Wikipedia (use {{R with old history}} instead).

To an article without mention: This is a redirect to an article without any mention of the redirected word or phrase.
- For titles that are obvious omissions from target articles, check the rcat index for more specific templates to use instead of this rcat – examples: {{R from misspelling}} for misspellings of article titles or {{R from incorrect name}} for wrong names.

From a cross-project redirect: This is a redirect from a title associated with an item on Wikidata. The Wikidata item associated with this page is control variable (Q25203375).
- Use this template only on hard redirects – for soft redirects use {{Soft redirect with Wikidata item}}.

When appropriate, protection levels are automatically sensed, described and categorized.