Manual includes vs autoloading in PHP - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to manually include the file 'User.php'.

PHP

<?php
[1] 'User.php';
$user = new User();
?>

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

Aload

Binclude

Crequire_once

Dautoload

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'autoload' which is not a PHP statement for manual includes.

Using 'load' which is not a valid PHP keyword.

The include statement is used to manually include a PHP file.

2fill in blank

medium

Complete the code to register an autoloader function named 'myAutoloader'.

PHP

<?php
spl_autoload_[1]('myAutoloader');
?>

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

Aregister

Binclude

Cautoload

Dload

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'include' or 'load' which are not functions to register autoloaders.

Using 'spl_register' which is not a valid PHP function.

The function spl_register does not exist, but spl_autoload_register does. The correct function is spl_autoload_register.

3fill in blank

hard

Fix the error in the autoloader function to correctly load class files from the 'classes/' directory.

PHP

<?php
function myAutoloader($className) {
    include_once 'classes/' . [1] . '.php';
}
spl_autoload_register('myAutoloader');
?>

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

A$class_name

B$classname

CclassName

D$className

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different variable name than the function parameter.

Forgetting the dollar sign ($) before the variable.

The parameter name is $className, so it must be used exactly as is inside the function.

4fill in blank

hard

Fill both blanks to create an autoloader that loads classes from the 'lib/' directory and uses the class name with '.class.php' extension.

PHP

<?php
function [1]($class) {
    include_once 'lib/' . $class . [2];
}
spl_autoload_register('[1]');

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

AmyAutoloader

B.php

C.class.php

Dautoload

Attempts:

3 left

💡 Hint

Common Mistakes

Using '.php' instead of '.class.php' for the file extension.

Using a different function name than the one registered.

The function name is 'myAutoloader' and the file extension is '.class.php' to match the class files.

5fill in blank

hard

Fill all three blanks to create an autoloader that loads classes from the 'src/' directory, converts class names to lowercase, and uses '.inc.php' extension.

PHP

<?php
function [1]($className) {
    $file = 'src/' . strtolower([2]) . [3];
    if (file_exists($file)) {
        include_once $file;
    }
}
spl_autoload_register('[1]');

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

AautoLoadClass

B$className

C'.inc.php'

Dstrtolower

Attempts:

3 left

💡 Hint

Common Mistakes

Using the variable without the dollar sign.

Using wrong file extension or function name.

The function name is 'autoLoadClass', the variable is '$className', and the file extension is '.inc.php'.