What are the limitations of using PHP functions on a web server that only supports HTML files?

When a web server only supports HTML files, PHP functions cannot be executed because the server does not recognize PHP code. To solve this issue, you would need to configure the web server to support PHP files by installing PHP and setting up the appropriate server configurations.

<?php
// This is a PHP code snippet that cannot be executed on a web server that only supports HTML files
// To enable PHP functionality, you would need to configure the server to support PHP files
// Once PHP is installed and configured, this code snippet can be executed on the server
?>