PHP Data Types | asadmukhtar.info

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PHP Data Types

What Are PHP Data Types?

A data type defines the type of value a variable can hold. PHP is a loosely typed language, meaning variables do not require explicit data type declarations. PHP automatically determines the type based on the assigned value.

PHP Supports 8 Data Types

1- String (Text)

A string is a sequence of characters enclosed in double ("") or single ('') quotes.

<?php
$text = "Hello, PHP!";
echo $text;
?>

✔ Outputs: Hello, PHP!

2- Integer (Whole Numbers)

An integer is a whole number without decimals.

<?php
$number = 100;
echo $number;
?>

✔ Outputs: 100

3- Float (Decimal Numbers)

A float (or double) is a number with decimal points.

<?php
$price = 99.99;
echo $price;
?>

✔ Outputs: 99.99

4- Boolean (True/False)

A boolean represents true (1) or false (0).

<?php
$isActive = true;
echo $isActive; // Outputs 1 (true)
?>

5- Array (Multiple Values in One Variable)

An array stores multiple values in one variable.

<?php
$colors = array("Red", "Green", "Blue");
echo $colors[0]; // Outputs Red
?>

✔ Outputs: Red (first item in the array)

6- Object (Custom Data Structure)

An object is a user-defined data type created using a class.

<?php
class Car {
  public $brand = "Toyota";
}
$myCar = new Car();
echo $myCar->brand;
?>

✔ Outputs: Toyota

7- NULL (No Value)

A NULL variable has no value.

<?php
$emptyVar = NULL;
var_dump($emptyVar); // Outputs NULL
?>

Conclusion

PHP supports 8 data types, including strings, numbers, arrays, objects, and more. PHP automatically assigns data types, making it easy to work with dynamic values.