The php|arhcitect C7Y Community is hosting a PHP contest. The task is to create a link scanner.

Given an arbitrary (but valid) HTML file, retrieve all the links that would be displayed as hyper links and display them sequentially, having removed any duplicates. You may use any built in function, the phpinfo() of the server used for testing will be attached. You just need to retrieve the links, you don’t need to worry about them being relative or absolute.

Head on to the contest topic at the c7y forums for more details.