Why autoloading is needed in PHP - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to include a class file manually.

PHP

<?php
require_once '[1]';
$class = new MyClass();
?>

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

A"MyClass.php"

B"autoload.php"

C"config.php"

D"index.php"

Attempts:

3 left

💡 Hint

Common Mistakes

Using unrelated file names like 'config.php' or 'index.php'.

Forgetting to include the class file before using the class.

You need to include the class file manually using require_once with the class filename.

2fill in blank

medium

Complete the code to register an autoloader function.

PHP

<?php
spl_autoload_[1]('myAutoloader');
function myAutoloader($class) {
    include $class . '.php';
}
?>

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

Aload

Bautoload

Cregister

Dinclude

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'load', 'autoload', or 'include' which do not form the correct function name.

Using 'load' or 'include' which are not valid spl functions.

The correct function to register an autoloader is spl_autoload_register. Here, the blank is for the part after spl_autoload_, so the correct answer is register.

3fill in blank

hard

Fix the error in the autoloader function to correctly load class files.

PHP

<?php
spl_autoload_register(function($class) {
    include '[1]' . $class . '.php';
});
?>

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

A"/var/www/"

B"./"

C"classes/"

D"src/"

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect or absolute paths that don't match file locations.

Forgetting the trailing slash in the path.

The autoloader should include the correct path prefix. Using "./" means current directory, which is common if class files are in the same folder.

4fill in blank

hard

Fill both blanks to create an autoloader that loads classes from the 'lib' folder and appends '.class.php' extension.

PHP

<?php
spl_autoload_register(function($class) {
    include "[1]" . $class . "[2]";
});

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

A"lib/"

B".php"

C".class.php"

D"classes/"

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong folder names or missing the slash.

Using incorrect file extensions like '.php' instead of '.class.php'.

The autoloader includes files from the 'lib/' folder and uses the '.class.php' extension for class files.

5fill in blank

hard

Fill all three blanks to create an autoloader that loads classes from 'src/', converts class names to lowercase, and appends '.php'.

PHP

<?php
spl_autoload_register(function($class) {
    $file = "[1]" . strtolower([2]) . "[3]";
    include $file;
});

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

A"src/"

B$class

C".php"

D"lib/"

Attempts:

3 left

💡 Hint

Common Mistakes

Not converting class name to lowercase.

Using wrong folder or file extension.

The autoloader builds the file path by prefixing 'src/', converting the class name to lowercase, and appending '.php'.