Sams Teach Yourself Ajax, JavaScript and PHP All in One

Chapter 16 Flow Control

What You’ll Learn on This Chapter:

Conditional Statements

Loops

In this chapter you will learn about the conditional and looping constructs that allow you to control the flow of a PHP script.

In this chapter we’ll look at two types of flow control: conditional statements, which tell your script to execute a section of code only if certain criteria are met, and loops, which indicate a block of code that is to be repeated a number of times.

Conditional Statements

A conditional statement in PHP begins with the keyword if ...