I am trying to build a kind of craigslist for my university. I want to use PHP and I have an idea of how to do the messaging portion. What I do not know how to do is create a new page when someone creates a post, automatically create a separate page for that post (and place it properly on the sitemap), message the webmaster that a post is made, and add it to the list of posts.
I don't know if I made sense but any idea can help us.
FYI, I am trying to use Joomla!, maybe phpBB and Wordpress. Let me know. Thanks.