PHP Function

In this chapter you will learn:

1. What Is a Function?
2. What is function parameter
3. What is return value form a function
4. Why Functions Are Useful

Description

A function is a self contained block of code that performs a specific task.

Parameter

A function often accepts one or more arguments, which are values passed to the function by the code that calls it.

The function can then read and work on those arguments.

Return

A function may optionally return a value that can then be read by the calling code.

In this way, the calling code can communicate with the function.

Why

Functions avoid duplicating code. They make it easier to eliminate errors.

Functions can be reused in other scripts. They help you break down a big project.

Next chapter...

What you will learn in the next chapter:

1. How to create a PHP function
2. Syntax to write your own functions
3. Example - define a function

PHP Function

PHP Function Create

PHP Function Parameter

PHP Function Default Parameters

PHP Variable Length Parameter

PHP Function Reference Parameter

PHP Function Return

PHP Return Reference

PHP Variable Scope in Functions

PHP Global Variables

PHP Recursive Functions

PHP Anonymous Function

PHP static variable