Composer autoload mechanism in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to include Composer's autoload file.

PHP

<?php
require_once '[1]';

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

Avendor/composer.json

Bcomposer.json

Cvendor/autoload.php

Dautoload.php

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'composer.json' instead of the autoload file.

Forgetting to include the 'vendor/' directory in the path.

Composer generates the vendor/autoload.php file to autoload classes.

2fill in blank

medium

Complete the code to instantiate a class loaded by Composer's autoloader.

PHP

<?php
require_once 'vendor/autoload.php';
$object = new [1]();

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Amyclass

BMyClass

Cmy_class

DClassMy

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase or snake_case instead of PascalCase.

Misspelling the class name.

Class names are case-sensitive and usually follow PascalCase. Composer autoloads classes by their exact names.

3fill in blank

hard

Fix the error in the autoloading by completing the namespace prefix in Composer's PSR-4 autoload config.

PHP

"autoload": {
    "psr-4": {
        "[1]": "src/"
    }
}

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AApp\

Bapp

Capp\

DApp

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the trailing backslash.

Using lowercase instead of capitalized namespace.

Namespace prefixes in PSR-4 must end with a backslash \ and are case-sensitive.

4fill in blank

hard

Fill both blanks to create a classmap autoload configuration for the 'lib' directory.

PHP

"autoload": {
    "[1]": ["[2]"]
}

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Aclassmap

Blib

Cpsr-4

Dsrc

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'psr-4' instead of 'classmap' for directories without namespaces.

Incorrect directory name.

The classmap autoload type maps all classes in the specified directory, here 'lib'.

5fill in blank

hard

Fill all three blanks to define a PSR-4 autoload for namespace 'Vendor\Package' pointing to 'src/' directory.

PHP

"autoload": {
    "[1]": {
        "[2]": "[3]"
    }
}

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

Apsr-4

BVendor\Package\

Csrc/

Dclassmap

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'classmap' instead of 'psr-4' for PSR-4 autoload.

Omitting the trailing backslash in the namespace.

Wrong directory path.

PSR-4 autoload requires the key 'psr-4', the namespace prefix ending with backslash, and the directory path.