What is the difference between HTML and PHP in terms of structure and functionality?

HTML is a markup language used for creating the structure of web pages, while PHP is a server-side scripting language used for creating dynamic web pages. HTML is used to define the layout and content of a web page, while PHP is used to process data, interact with databases, and perform other server-side tasks. PHP code is embedded within HTML code using special delimiters.

<?php
// PHP code here
?>