Main PHP Data Types

Main PHP Data Types

This is A quick post to understand datatypes in the PHP 

and those are complex to understand are only included below with little explanation. :)

PHP supports the following data types:

• String
• Integer
• Float (floating point numbers - also called double)
• Boolean
• Array
• Object
• Resource
• NULL

Integer

mainly, It is a number between -2,147,483,648 and +2,147,483,647.

Boolean

A Boolean shows two possible states: TRUE or FALSE.

$a = true;
$b = false;

Booleans are mostly used in conditional testing. 

Array

to stores multiple values in one single variable.

PHP NULL Value

Null is a special data type which can have only one value, NULL.

A variable of data type NULL,no value assigned to it.

Note: If a variable, without a value, it is automatically assigned a value of NULL.

Variables can also be emptied by setting the value to NULL:

Example

<?php
$a = "Hello universe.!";
$b = null;
var_dump($a);
?>

Resource

not an actual data type. It stores the reference of functions and external resources  to PHP.

Example:  database call.