Help:Bad title/en

Some page titles are defined as bad for various reasons. You can't create pages with these titles.

For details of what constitutes a bad title, see regex section or Title.php.

For reference here is an example of a horrible, but valid title:
 * Some¬`!"£$^&*_+-=~?/.,;:'@

Things you can't use in titles:
 * The following standard CGI chars are not good:
 * http://www.mediawiki.org/wiki/Some%s - Very bad!


 * The following standard wiki syntax seems to work:
 * http://www.mediawiki.org/wiki/Some%sSome[s - gets trimmed
 * http://www.mediawiki.org/wiki/Some%sSome]s - gets trimmed
 * http://www.mediawiki.org/wiki/Some%sSome{s - bad
 * http://www.mediawiki.org/wiki/Some%sSome}s - bad


 * and some just don't work:
 * http://www.mediawiki.org/wiki/Some%sSome#s - gets trimmed


 * and some HTML like constructs are very bad, and can't be show here because they break page formatting:
 * http://www.mediawiki.org/wiki/Some%sSome s - bad

HTTP Codes
These vary according to the version number of the software:
 * 400 (Bad Request) for v1.19.1 and above
 * 200 (OK) for v1.16.4 and earlier