Comments in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add a single-line comment in PHP.

PHP

<?php
[1] This is a comment
echo "Hello World!";
?>

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

A#

B<!--

C/*

D//

Attempts:

3 left

💡 Hint

Common Mistakes

Using HTML comment tags for PHP comments.

Using block comment start /* for single-line comments.

In PHP, single-line comments can start with //.

2fill in blank

medium

Complete the code to add a single-line comment using an alternative syntax.

PHP

<?php
[1] This is another single-line comment
echo "Hello again!";
?>

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

A/*

B#

C//

D--

Attempts:

3 left

💡 Hint

Common Mistakes

Using SQL comment syntax like -- which is not valid in PHP.

Using block comment start /* for single-line comments.

PHP also supports single-line comments starting with #.

3fill in blank

hard

Fix the error in the code to properly write a multi-line comment in PHP.

PHP

<?php
[1] This is a
multi-line comment */
echo "Done!";
?>

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

A/*

B//

C#

D<!--

Attempts:

3 left

💡 Hint

Common Mistakes

Using single-line comment syntax for multi-line comments.

Using HTML comment tags which do not work in PHP.

Multi-line comments in PHP start with /* and end with */.

4fill in blank

hard

Fill both blanks to correctly write a multi-line comment in PHP.

PHP

<?php
[1] This is a
multi-line comment [2]
echo "Finished!";
?>

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

A/*

B//

C*/

D#

Attempts:

3 left

💡 Hint

Common Mistakes

Not closing the multi-line comment.

Using single-line comment syntax for multi-line comments.

Multi-line comments start with /* and end with */ in PHP.

5fill in blank

hard

Fill all three blanks to write a PHP script with different comment styles.

PHP

<?php
[1] This is a single-line comment
[2] This is another single-line comment
[3] This is a multi-line comment start
This is inside the comment
*/
echo "Comments done!";
?>

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

A//

B#

C/*

D--

Attempts:

3 left

💡 Hint

Common Mistakes

Using SQL comment syntax like -- which is invalid in PHP.

Not closing multi-line comments properly.

PHP supports // and # for single-line comments, and /* ... */ for multi-line comments.