I've been programming in PHP for years, and I've read many books on the language. Most of them are really boring. They have chapters of programming terminology and the history of the language. This can be useful to learn eventually. But you want to do something in the language before you worry about much else.
This book covers everything you need to know to get started creating web sites and web applications, including HTML, echo, comments, variables, operators, arrays, loops, if statements, functions, object-oriented programming, inheritance, visibility, frameworks, MVC, and databases.
After reading this book, you'll have a really good base that you can expand on by working on coding projects and reading online tutorials.