Thread:Project:Support desk/php code in wiki

How can I add php code to Wiki page? I need add php code to page or specify script as "action" in the html form. RawHtml enabled but php doesn't work.

MediaWiki 	1.19.1 PHP 	5.3.10-1ubuntu3.2 (apache2handler) MySQL 	5.5.24-0ubuntu0.12.04.1