Data Types

Variables can store data of different types, and different data types can do different things.

PHP supports the following data types:

string (text values) The string data type is used to store text
int (whole numbers) The int (integer) data type is used to store whole numbers (numbers without decimal points).
float (decimal numbers) the float data type (also called floating-point or double) is used to store numbers with decimal points or numbers written in exponential form.
bool (true or false) The boolean data type is a primitive data type that represents only two possible states: true or false. It is mainly used to control the flow of a program by making decisions based on conditions.
array (multiple values) The array data type is used to store multiple values in a single variable.
object (stores data as objects) The object data type is used to store data and information in the form of objects, which are created using classes.
null (empty variable) The NULL data type is a special type used to represent a variable with no value.
resource (references external resources) The resource data type is a special type used to store references to external resources.

var_dump() is used in PHP to show the value and data type of a variable.

Example

// String data type
$name = "Rahul";

// Integer data type
$age = 20;

// Float (decimal) data type
$price = 99.99;

// Boolean data type
$isLogin = true;

// Array data type
$colors = array("Red", "Green", "Blue");

// Object data type
class Car {
function drive() {
echo "Car is moving";
}
}

// Creating object of Car class
$car = new Car();

// NULL data type
$x = NULL;

// Displaying values with var_dump() for checking type and value
var_dump($name);
var_dump($age);
var_dump($price);
var_dump($isLogin);
var_dump($colors);
var_dump($car);
var_dump($x);