The only way to learn a new programming language is by writing programs in it.

PHP

Head First PHP & MySQL

A Brain-Friendly Guide Head First PHP & MySQL

Learning PHP, MySQL, & JavaScript

Learning PHP, MySQL, & JavaScript with JQuery, CSS & HTML5

PHP

A Beginner's Guide

PHP in Action

PHP in Action Objects, Design, Agility

First, solve the problem. Then, write the code.

Happy coding