Why modern PHP matters - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print a simple message using modern PHP syntax.

PHP

<?php

echo [1];

?>

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

A"Hello, modern PHP!"

BHello, modern PHP!

C'Hello, modern PHP!'

Dprint("Hello, modern PHP!")

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to put quotes around the string.

Using print() inside echo statement.

In PHP, strings must be enclosed in quotes. Double quotes allow variable parsing and are commonly used for strings.

2fill in blank

medium

Complete the code to declare a typed property in a PHP class.

PHP

<?php

class User {
    [1] string $name;
}

?>

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

Avar

Bprotected

Cpublic

Dprivate

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'var' which is deprecated in modern PHP.

Using private or protected when public is needed.

In modern PHP, properties are declared with visibility keywords like public, private, or protected. Here, public is used to allow access from outside the class.

3fill in blank

hard

Fix the error in the function declaration using modern PHP return type syntax.

PHP

<?php

function getCount(): [1] {
    return 5;
}

?>

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

Abool

Bvoid

Cstring

Dint

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'string' or 'bool' as return type when returning an integer.

Using 'void' when the function returns a value.

The function returns an integer value 5, so the return type should be 'int'.

4fill in blank

hard

Fill both blanks to create a typed array property with default empty array in a PHP class.

PHP

<?php

class Product {
    private array [1] = [2];
}

?>

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

A$tags

B[]

Carray()

D$items

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'array()' instead of '[]' for empty array.

Forgetting the dollar sign in property name.

The property name is '$tags' and the default value for an empty array is '[]' in modern PHP.

5fill in blank

hard

Fill all three blanks to create a typed function with nullable parameter and return type in modern PHP.

PHP

<?php

function findUser([1] ?int $id): ?[2] {
    if ($id === null) {
        return null;
    }
    return new [3]();
}

?>

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

Apublic

BUser

Dint

Attempts:

3 left

💡 Hint

Common Mistakes

Adding visibility keyword to function parameter.

Mismatch between return type and returned object.

The function parameter is a nullable int, so no visibility keyword is needed here. The return type is nullable User, and the function returns a new User object.