Why OOP is needed in PHP - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a class in PHP.

PHP

<?php
class [1] {
}
?>

Drag options to blanks, or click blank then click option'

Avariable

Bfunction

Cecho

DCar

Attempts:

3 left

💡 Hint

Common Mistakes

Using keywords like 'function' or 'echo' as class names.

Leaving the class name blank.

In PHP, class is followed by the class name, like Car.

2fill in blank

medium

Complete the code to create an object from a class.

PHP

<?php
$car = new [1]();
?>

Drag options to blanks, or click blank then click option'

ACar

Bfunction

Cecho

Dvariable

Attempts:

3 left

💡 Hint

Common Mistakes

Using keywords like 'function' instead of a class name.

Forgetting the parentheses after the class name.

To create an object, use new followed by the class name, like Car.

3fill in blank

hard

Fix the error in the method declaration inside the class.

PHP

<?php
class Car {
    public function [1]() {
        echo "Car started";
    }
}
?>

Drag options to blanks, or click blank then click option'

Astart

Becho

CCar

Dvariable

Attempts:

3 left

💡 Hint

Common Mistakes

Using class name as method name.

Using PHP keywords as method names.

Method names should be descriptive verbs like start.

4fill in blank

hard

Complete the code to call the method on the object.

PHP

<?php
$car = new Car();
$car->start[1];
?>

Drag options to blanks, or click blank then click option'

A->

B()

C;

D.

Attempts:

3 left

💡 Hint

Common Mistakes

Using dot . instead of arrow ->.

Forgetting parentheses when calling methods.

Use -> to access methods and () to call them.

5fill in blank

hard

Fill all three blanks to define a property and set it in the constructor.

PHP

<?php
class Car {
    public [1] $color;
    public function __construct([2] $color) {
        $this->color = [3];
    }
}
?>

Drag options to blanks, or click blank then click option'

Astring

B$color

Ccolor

Dint

Attempts:

3 left

💡 Hint

Common Mistakes

Using property name without $.

Assigning property to wrong variable.

Properties have types like string. The constructor parameter and assignment use $color.