On PHPBuilder.com today there's a new article from Marc Plotz looking at how you can use PHP and cURL with Facebook to update your status.
You probably know that cURL is a wonderful tool for extracting data from a Web page -- that's a given if you are a developer worth your salt. However, in this article, I want to show you how to use cURL to do things for you. We will start by exploring cURL in detail and then move on to use a very cool script to update our Facebook status.
He introduces cURL for those that aren't familiar with it already (including how to tell if it's installed) and some basic code to show a GET request on a remote file. Things get a little more complicated from there - you'll need to set up some cookies for Facebook, use some regular expression matching to find the form to submit to and send the POST data correctly for the update.