Case conversion functions in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to convert the string to uppercase.

PHP

<?php
$text = "hello world";
echo [1]($text);
?>

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

Aucwords

Bstrtolower

Cstrtoupper

Ducfirst

Attempts:

3 left

💡 Hint

Common Mistakes

Using strtolower which converts to lowercase.

Using ucfirst which only capitalizes the first letter.

The strtoupper function converts all characters in a string to uppercase.

2fill in blank

medium

Complete the code to convert the string to lowercase.

PHP

<?php
$text = "HELLO WORLD";
echo [1]($text);
?>

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

Astrtolower

Bucfirst

Cstrtoupper

Ducwords

Attempts:

3 left

💡 Hint

Common Mistakes

Using strtoupper which converts to uppercase.

Using ucfirst which only capitalizes the first letter.

The strtolower function converts all characters in a string to lowercase.

3fill in blank

hard

Fix the error in the code to capitalize the first letter of each word.

PHP

<?php
$text = "hello world";
echo [1]($text);
?>

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

Astrtoupper

Bucwords

Cstrtolower

Ducfirst

Attempts:

3 left

💡 Hint

Common Mistakes

Using ucfirst which only capitalizes the first letter of the whole string.

Using strtoupper which makes all letters uppercase.

The ucwords function capitalizes the first letter of each word in a string.

4fill in blank

hard

Fill both blanks to convert the string to lowercase and then capitalize the first letter.

PHP

<?php
$text = "HELLO WORLD";
$lower = [1]($text);
$result = [2]($lower);
echo $result;
?>

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

Astrtolower

Bucwords

Cucfirst

Dstrtoupper

Attempts:

3 left

💡 Hint

Common Mistakes

Using strtoupper instead of strtolower first.

Using ucwords instead of ucfirst for the second step.

First, strtolower converts the string to all lowercase. Then, ucfirst capitalizes the first letter of the string.

5fill in blank

hard

Fill all three blanks to convert the string to lowercase, then capitalize the first letter of each word, and finally convert the whole string to uppercase.

PHP

<?php
$text = "hello world";
$lower = [1]($text);
$capitalized = [2]($lower);
$upper = [3]($capitalized);
echo $upper;
?>

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

Aucfirst

Bstrtolower

Cucwords

Dstrtoupper

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the order of functions.

Using ucfirst instead of ucwords for capitalizing each word.

First, strtolower makes all letters lowercase. Then, ucwords capitalizes the first letter of each word. Finally, strtoupper converts the entire string to uppercase.