Instanceof operator in PHP - Mini Project: Build & Apply

Instanceof Operator in PHP

📖 Scenario: You are working on a simple PHP program that deals with different types of vehicles. You want to check if a given object is an instance of a specific class to decide how to handle it.

🎯 Goal: Build a PHP script that creates vehicle objects and uses the instanceof operator to check their types.

📋 What You'll Learn

Create a class called Car

Create a class called Bike

Create an object of class Car named $myCar

Create an object of class Bike named $myBike

Use the instanceof operator to check if $myCar is an instance of Car

Use the instanceof operator to check if $myBike is an instance of Car

Print the results exactly as instructed

💡 Why This Matters

🌍 Real World

Checking object types is common when you work with different kinds of data or objects in a program, so you can handle each type correctly.

💼 Career

Understanding <code>instanceof</code> helps in writing clear and safe code, especially in object-oriented programming jobs like backend PHP development.

1

Create the Vehicle Classes

Create a class called Car and a class called Bike in PHP.

PHP

# Your code here

Need a hint?

Use the class keyword to define classes in PHP.

2

Create Vehicle Objects

Create an object called $myCar from the Car class and an object called $myBike from the Bike class.

PHP

<?php
class Car {
}

class Bike {
}

// Create $myCar as an instance of Car
// Create $myBike as an instance of Bike
# Your code here

Need a hint?

Use the new keyword to create objects from classes.

3

Check Object Types with instanceof

Use the instanceof operator to check if $myCar is an instance of Car and if $myBike is an instance of Car. Store the results in variables $isCar and $isBikeCar respectively.

PHP

<?php
class Car {
}

class Bike {
}

$myCar = new Car();
$myBike = new Bike();

// Check if $myCar is an instance of Car and store in $isCar
// Check if $myBike is an instance of Car and store in $isBikeCar
# Your code here

Need a hint?

Use the syntax: $variable = $object instanceof ClassName;

4

Print the Results

Print the values of $isCar and $isBikeCar using var_dump() to show if they are true or false.

PHP

<?php
class Car {
}

class Bike {
}

$myCar = new Car();
$myBike = new Bike();

$isCar = $myCar instanceof Car;
$isBikeCar = $myBike instanceof Car;

// Print $isCar
// Print $isBikeCar
# Your code here

Need a hint?

Use var_dump() to print boolean values clearly.