title: Suggest a good PHP wiki engine
body: <p>I am looking for a small wiki engine that is easy to embed into an existing PHP application.  Or perhaps a set of libraries to handle all the typical wiki functions.</p>
  
  <p>Currently I am using <a href="http://erfurtwiki.sourceforge.net/" rel="noreferrer">ErfurtWiki</a>, but it is starting to show its age.  It hasn't been updated since 2005, and several of the pages on sourceforge appear to have been <a href="http://erfurtwiki.sourceforge.net/MailingList" rel="noreferrer">hacked</a>.</p>
  
  <p>I will be including it with a GPLv2 application so a GPL compatible license is important.</p>
  
  <p>Edit:</p>
  
  <p>To update, mostly I am just looking for text formatting/parser functionality.  I want to deal with the storage, security, rev history, etc on my own.</p>