PHP code documentation tool

Hello I recently got a fairly big project in PHP. Before starting I would like to clear some doubts. What is the best way to document such projects? How you developers document your project? For .NET etc. there are many documentation tools like doc-o-matic etc. Do we need to document the code based on rules for such software...or you create your own PHP script to extract comments? Is there any tool like doc-o-matic for PHP or anybody developing something like that? Karam __________________________________ Do you Yahoo!? Yahoo! Hotjobs: Enter the "Signing Bonus" Sweepstakes http://hotjobs.sweepstakes.yahoo.com/signingbonus