Variables

A variable is a special container that that you can hold a value. According to the PHP manual, there are eight type of variables in the language.

Category - Data Types

Scalar - Boolean, Integer, floting point and String.

Compound - Array, Object

Special - Resourse, Null

• A variable's name must start with a dollar sign, ($), For example $name, $link.
• The name can contain a combination of string, numbers and the underscore, Ex: $my_report1.
• The first charactor after the dollar sign cannot be number.
• Variable names in PHP are case-sensitive. So $name and $Name are entirely different variables.

This is just a cursory introduction to variables. You'll learn more about specific types (Strings and numbers) as well as manipulating these later.