Sams Teach Yourself PHP, MySQL® and Apache All in One, Fifth Edition

Chapter 6. Flow Control Functions in PHP

In this chapter, you learn the following:

• How to use the if statement to execute code if a test expression evaluates to true

• How to execute alternative blocks of code when the test expression of an if statement evaluates to false

• How to use the switch statement to execute code based on the value returned by a test expression

• How to repeat execution of code using a while statement

• How to use for statements to make neater loops

• How to break out of loops

• How to nest one loop within another

• How to use PHP start and end tags within control structures

The scripts created in the previous chapter flow only in a single direction: forward. That is, the same statements execute in the same order ...