Mantis - Integrate Wiki

I am using Mantis (PHP and MysQL) as a bug tracking tool and I would like to extend it in order to document requirements and technical specifications. Ideally, I should be able to link a defect with a requirement. Is there a way to integrate a Wiki tool (preferably PHP and MySQL based) into Mantis? EDITED: - Instructions how to integrate DocuWiki can be found in this article "Integrating DokuWiki with Mantis" - Instructions how to integrate MediaWiki can be found here (Thanks Ian) - Instructions how to integrate TWiki can be found here and here Suggested alternatives to Mantis: (open source bugtrackers with integrated Wiki) - TikiWiki (Php) - PhpWiki (Php) - Trac (Python) (Thanks ax) - Redmine (Ruby on Rails) (Thanks Paul)