Comments in PHP - Mini Project: Build & Apply

Comments in PHP

📖 Scenario: You are writing a simple PHP script to display a greeting message. To make your code clear for others and yourself, you will add comments explaining each part.

🎯 Goal: Learn how to write single-line and multi-line comments in PHP to explain your code.

📋 What You'll Learn

Create a PHP variable with a greeting message

Add a single-line comment explaining the variable

Add a multi-line comment explaining the print statement

Print the greeting message

💡 Why This Matters

🌍 Real World

Comments are used by developers everywhere to explain what their code does, making it easier to maintain and update.

💼 Career

Writing clear comments is a key skill for programmers, helping teams collaborate and ensuring code quality in professional projects.

1

Create a greeting variable

Create a PHP variable called $greeting and set it to the string "Hello, world!".

PHP

<?php

// Create a variable called $greeting and set it to "Hello, world!"

Need a hint?

Use $greeting = "Hello, world!"; to create the variable.

2

Add a single-line comment

Add a single-line comment above the $greeting variable that says // This is the greeting message.

PHP

<?php
// Add a single-line comment explaining the greeting variable
$greeting = "Hello, world!";

Need a hint?

Start the comment with // followed by your text.

3

Add a multi-line comment

Add a multi-line comment below the variable that says:
/* Print the greeting message to the screen
using echo statement */

PHP

<?php
// This is the greeting message
$greeting = "Hello, world!";

// Add a multi-line comment explaining the print statement

Need a hint?

Use /* to start and */ to end the multi-line comment.

4

Print the greeting message

Write a line of PHP code to print the $greeting variable using echo.

PHP

<?php
// This is the greeting message
$greeting = "Hello, world!";

/* Print the greeting message to the screen
using echo statement */

// Print the greeting message

Need a hint?

Use echo $greeting; to display the message.