This is code from http://www.thewebmasters.net/. No XML support needed for this. PLEASE rather get the code from the orginal site, don't trust me :)
Quote from this site:
New toy, PHP-RSS - Jun 11, 2001
Wheee. New class for you to play with. A quick-n-dirty RSS parser that does not require that XML support be compiled into PHP. It does require PHP v4 with PCRE support. No documentation, some demo files are included in the tarball showing usage. It's fairly simple, took all of two hours to write and works extremely well.