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Hello World!

Part of the Fundamentals section of Coddy's PHP journey — lesson 2 of 71.

The "Hello World!" is a simple program that outputs Hello World! to the screen.

In PHP, we use echo to show words on the screen. The words go inside quotation marks.

Let's take a look at the "Hello World!" program in PHP:

<?php
echo "Hello World!";
?>

Challenge

Easy

Use the code view to write a program that outputs Hello World!

Note that anything inside quotation marks is case sensitive. For example:
<?php
echo "Hello World!";
?>
<?php
echo "hello world!";
?>
are different things (notice the capital letters in the first line).

Cheat sheet

To output text in PHP use echo:

<?php
echo "Hello World!";
?>

Try it yourself

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Fundamentals

1Introduction to PHP

The PHP LanguageHello World!Tags and Statements Comments The new line

4Comparison & Logical Operators

Comparison Operators Equality & Identity Logical Operators Part 1 Logical Operators Part 2 Recap - Simple Logic

7Arrays Part 2 - Associative

Intro to Associative Arrays Accessing Values by Key Modifying Values by Key Adding New Key-Value Pairs Check if Key Exists Recap - Key-Value Data Store

10Functions

Declaring & Calling Functions Function Parameters Returning Values Default Parameter Values Type Declarations for Params Return Type Declarations Variable Scope Recap - Creating Reusable Code