Building wiki like functionality

I am building my application in Codeigniter. It has a module where users cr开发者_如何学Ceate documents, which can be edited at a later time. How do I implement a 'history' of revisions, perhaps like a wiki ? Is it possible to embed a php wiki in a web app (twiki/dokuwiki)?

Consider embeding a wiki into your application so that you don't have to create your own wiki-like functionality from scratch. I know dooWikis enables you to do this without displaying any third-party branding or advertising on your site while still giving you control over who gets to make changes to the content.