Basic PHP webapp

Would it be possible to download a basic PHP 5 web app from somewhere?
It should support:

- basic authentication (users/passwords in a SQL table)
- "forgot password?" feature
- sessions (session ID encoded in URL)

Thanks skdevnullERASE at ERASEyahoo dot com

is it definitely need to write in PHP5?
if not, have a try in hotscripts.com, they have thousands of script there~