What is the difference between PHP and JavaScript in terms of executing code on the client side?

PHP is a server-side scripting language, meaning that the code is executed on the server before the HTML is sent to the client's browser. On the other hand, JavaScript is a client-side scripting language, meaning that the code is executed on the client's browser. This means that PHP code is processed on the server, while JavaScript code is processed on the client's machine.

// PHP code snippet to demonstrate server-side processing
<?php
echo "Hello, World!";
?>