Hour 5. Going with the Flow

What You'll Learn in This Hour:

• How to use the if statement to execute code only when a condition is met

• How to execute alternative blocks of code when the condition of an if statement is not met

• 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's start and end tags within control structures

The scripts created in the last hour flow only in a single direction. The same statements are executed in the same order every time a script is run. This does not leave much room for flexibility. We now will look at some structures that enable your scripts to adapt to circumstances.