At this point, you're going to put your new jQuery knowledge aside for a bit and focus on the backend using PHP. Part 2 teaches you how to plan and implement an objectoriented backend solution for an events calendar that you will later enhance using your new knowledge of jQuery. This book assumes you have a reasonably sound grasp on the basic concepts of PHP (variables, functions, the basic language constructs); to brush up on your PHP basics, check out PHP for Absolute Beginners (Apress, 2009).