Why namespaces are needed in PHP - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a namespace named MyApp.

PHP

<?php
namespace [1];

class User {}

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

AApp

BNamespace

CMyApp

DUser

Attempts:

3 left

💡 Hint

Common Mistakes

Using reserved words as namespace names

Omitting the namespace keyword

The namespace keyword is followed by the namespace name, here MyApp.

2fill in blank

medium

Complete the code to use the class User from the namespace MyApp.

PHP

<?php
use [1]\User;

$user = new User();

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

AApp

BMyApp

CNamespace

DUser

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong namespace name

Forgetting to import the class

The use statement imports the class User from the namespace MyApp.

3fill in blank

hard

Fix the error in the code by completing the blank to refer to the global class Exception.

PHP

<?php
try {
    throw new \[1]("Error occurred");
} catch (\Exception $e) {
    echo $e->getMessage();
}

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

AException

BError

CThrowable

DErrorException

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the leading backslash

Using wrong class names

The global Exception class must be referenced with a leading backslash to avoid namespace conflicts.

4fill in blank

hard

Fill both blanks to create a namespace and define a class inside it.

PHP

<?php
namespace [1];

class [2] {}

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

AShop

BUser

CApp

DProduct

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing namespace and class names

Using invalid identifiers

The namespace is App and the class defined inside is Product.

5fill in blank

hard

Fill all three blanks to import a class and create its instance.

PHP

<?php
use [1]\[2];

$obj = new [3]();

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

AMyApp

BUser

DApp

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong namespace or class names

Forgetting to import before instantiation

The class User from namespace MyApp is imported and instantiated.