NWMLS IDX PHP script?

I currently use PHRETS to query/download information from the RMLS's RETS server and was wondering if there's a similar script or library for connecting to the NWMLS IDX server?

A PHP script/library would be preferred.

Or can PHRETS already do what I'm wanting? I've tried a few different configs and haven't been able to get it to work.

Thanks