Good for you. I've started working with Ruby and RoR about three weeks ago now, also from PHP. These are some of the the things I've read/watched to get a grasp on the whole:
Why's Poignent Guide To Ruby http://mislav.uniqpath.com/poignant-guide/
I found the RailsCasts invaluable. It's great to just see someone code stuff, instead of finished examples: http://railscasts.com/
Read every one of the Rails guides: http://guides.rubyonrails.org/
I started reading Russ Olsen's Eloquent Ruby yesterday, which is absolutely awesome. I'm already half way trough. Wish he could rewrite every programming book I ever read. http://www.amazon.com/Eloquent-Ruby-Addison-Wesley-Professio...
It felt really daunting at first, because it seems there's so much new stuff to learn (Ruby, Rails, Passenger/Phusion, Gems, Capistrano, RVM, Rake, db migrations, etc etc). But hang in there. As I said, I started only a couple of weeks ago and already feel like I never want to go back.