PHP - Variables and Data types

What is a Variable?

Variables are used to store values into the system's memory. Variables allows to perform set of actions and can be re-use within the code. You can change the out put of the program by changing the variable values rather changing the script.

Data Types

String    : used for character values such as sentences, names stc

Integer  : used to store numeric values of whole numbers

Float      : used to store numeric values of real numbers

Boolean: used to store either true or false or 1 or 0

Object   : used to store collection of values (data) or methods

Important: PHP is loosely typed language, that means your script determines the data type of the variable. 

Ex: 

$val = "PHP Programming" // This is considering as String Value

$val = 50 // This is considering as Integer Value

$val = "100" //This is considering as String value

$val =  $val * 5 // This is considering as Integer value

$val = $val * 1.25 //This is considering as float value