Good xml to array class?

I've done searching on google for "xml parsers" and xml to array using php and honestly there are SOOOO many. Most of the classes I've taken a look at either aren't finished, or require dom to work. Either I write my own or I get help from you guys. So me being the lazy person that I am will ask you guys. Anyone know of a very good xml to array class that is available as open source? I need it to not rely on DOM since the php which I am dealing with, only has expat compiled in. Thanks for any pointers to good classes! Brent