Method overriding in PHP - Mini Project: Build & Apply

Method overriding

📖 Scenario: Imagine you are creating a simple system for different types of vehicles. Each vehicle can describe itself, but some vehicles have special descriptions.

🎯 Goal: You will create a base class with a method, then create a child class that overrides this method to provide a special message.

📋 What You'll Learn

Create a base class called Vehicle with a method describe() that returns the string "This is a vehicle."

Create a child class called Car that extends Vehicle.

Override the describe() method in Car to return the string "This is a car."

Create an object of Car and print the result of calling its describe() method.

💡 Why This Matters

🌍 Real World

Method overriding helps customize behavior in different types of objects, like vehicles, animals, or employees, while sharing common features.

💼 Career

Understanding method overriding is essential for object-oriented programming, which is widely used in software development jobs to build flexible and reusable code.

1

Create the base class Vehicle

Create a class called Vehicle with a public method describe() that returns the string "This is a vehicle."

PHP

<?php

// Create class Vehicle with method describe()
// Your code here

Need a hint?

Use class Vehicle {} and inside it define public function describe() that returns the string.

2

Create the child class Car

Create a class called Car that extends Vehicle.

PHP

<?php

class Vehicle {
    public function describe() {
        return "This is a vehicle.";
    }
}

// Create class Car that extends Vehicle
// Your code here

Need a hint?

Use class Car extends Vehicle {} to create the child class.

3

Override the describe() method in Car

Inside the Car class, override the describe() method to return the string "This is a car."

PHP

<?php

class Vehicle {
    public function describe() {
        return "This is a vehicle.";
    }
}

class Car extends Vehicle {
    // Override describe() method
    // Your code here
}

Need a hint?

Define public function describe() inside Car and return the new string.

4

Create Car object and print description

Create an object called $myCar of class Car and print the result of calling $myCar->describe().

PHP

<?php

class Vehicle {
    public function describe() {
        return "This is a vehicle.";
    }
}

class Car extends Vehicle {
    public function describe() {
        return "This is a car.";
    }
}

// Create object $myCar and print description
// Your code here

Need a hint?

Create the object with new Car() and use print() to show the description.