What are some best practices for including specific parts of HTML files in PHP without affecting the overall structure or functionality?

When including specific parts of HTML files in PHP, it's important to use PHP's include or require functions to pull in the desired content without altering the overall structure or functionality of the HTML file. This allows for better organization and reusability of code. Make sure to include the HTML content within the PHP tags to ensure it is processed correctly.

<?php
include 'header.php'; // Include the header content
?>
<!-- Your specific HTML content here -->
<?php
include 'footer.php'; // Include the footer content
?>