Thanks guys, for your kind advice.
I first watched some PHP training videos, and then grabed this book. I have years of programming experience, but not in the area of web development, and not OOP at all. But I know the way to learn a programming language -- to hand-code examples on the book and try it out myself. This is how I am learning now. I will try my best to complete one chapter in 2-3 days. After finishing this book, I will google some PHP scripts and play with them, and grab Larry's OOP PHP book(since PHP frameworks are all about OOP PHP).
Whenever I have questions, I will post them on the forum, this forum is great!