PHP Integer Variables

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Introduction:
This tutorial will cover integer 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 integers used?
As stated above, integers are used to hold full numbers and as such are used for holding data such as; age, rounded numbers, totals. Integers are not meant to hold decimal numbers.

There are two types of integers; 32bit and 64bit. 32bit Integers can hold a maximum value of 2147483647, while 64bit Integers can hold a maximum value of 9223372036854775807.

Examples:
Creating a boolean variable named 'integ':

  1. $integ;

Creating and initializing a integer variable named 'integ':

  1. $integ = 1;

Writing out our integer on-screen:

  1. echo $integ;

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