PHP Boolean Variables

Introduction: This tutorial will cover boolean variables in PHP. What is a variable? A variable is a piece of information which holds a value. Each variable has a type and a reference name. The value of a variable will depend on the type for that particular variable. What types can a variable be? There are a few different basic types of variable which include; Strings Booleans Integers Strings hold characters, letters, numbers and symbols in a string format (essentially a character array), Booleans hold a true or false value and Integers hold a full number. When are booleans used? Booleans are used to determine if something is true or false and as such it can only hold a 'true' or 'false' value. Booleans are used in statements such as the if and else. Bool is the shorthand version of Boolean. Examples: Creating a boolean variable named 'bool': Creating and initializing a boolean variable named 'bool': Checking if bool is true, and if it is outputting 'Yes': Checking if bool is true, and if it is outputting 'Yes'; the below code would NOT output: Even though our boolean is not a string, we can still output the value. However; if it is true, it will be a string value of '1'; and a '0' if it is false: