I have been using Magpie Rss for a while to parse rss feeds in php. It has worked pretty well for me. But recently I have been working on some projects where I need to parse tags that have attributes. Some examples of tags with attributes in rss are enclosure tags for podcasts or cloud tags for rssCloud. Magpie Rss doesn't support attributes, but only support values within begin and end tags.
I found RSS_PHP which looks to do what I want. This library does support rss attributes and extensions. I will pay for the commercial version if the free version continue to works as well as it is now.