Sub-namespaces in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a sub-namespace inside the main namespace.

PHP

<?php
namespace App\\[1];

class User {}

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AControllers

BHelpers

CViews

DModels

Attempts:

3 left

💡 Hint

Common Mistakes

Using a sub-namespace name that does not match the folder structure.

Forgetting to use double backslashes in the namespace declaration.

The sub-namespace Models is declared inside the main namespace App.

2fill in blank

medium

Complete the code to use a class from a sub-namespace with the correct fully qualified name.

PHP

<?php
use App\\[1]\\User;

$user = new User();

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AControllers

BHelpers

CModels

DServices

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong sub-namespace in the use statement.

Forgetting to import the class before using it.

The class User is inside the sub-namespace Models, so we use App\Models\User.

3fill in blank

hard

Fix the error in the namespace declaration by completing the sub-namespace correctly.

PHP

<?php
namespace App\\[1]\\Services;

class Payment {}

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ABilling

BControllers

CModels

DHelpers

Attempts:

3 left

💡 Hint

Common Mistakes

Using a sub-namespace that does not match the service's purpose.

Omitting the sub-namespace and causing class conflicts.

The sub-namespace Billing is the correct part of the namespace for the Payment service.

4fill in blank

hard

Fill both blanks to create a nested sub-namespace and declare a class inside it.

PHP

<?php
namespace App\\[1]\\[2];

class Logger {}

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AUtils

BHelpers

CCore

DServices

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the order of sub-namespaces.

Using invalid namespace names that don't follow naming conventions.

The class Logger is declared inside the nested sub-namespace App\Utils\Helpers.

5fill in blank

hard

Fill all three blanks to import a class from a nested sub-namespace and create its instance.

PHP

<?php
use App\\[1]\\[2]\\[3];

$logger = new Logger();

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

AUtils

BHelpers

CLogger

DServices

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to include the class name in the use statement.

Using incorrect sub-namespace names or order.

The class Logger is imported from the nested sub-namespace App\Utils\Helpers\Logger and instantiated.