What is the difference between using include() and frames in PHP?

Using include() in PHP allows you to include the contents of a separate file within your current file, while frames are used in HTML to divide a webpage into multiple sections that can load different documents. The main difference is that include() is a PHP function that dynamically includes files at runtime, while frames are a static HTML feature that load separate documents in separate sections of a webpage. Include() is typically used for modularizing code and reusing common elements, while frames are used for structuring a webpage layout.

<?php
include('header.php');
include('content.php');
include('footer.php');
?>