Are there any specific guidelines or recommendations for including PHP files within a webpage to prevent distortion or layout issues?

When including PHP files within a webpage, it is important to ensure that the PHP code does not interfere with the layout or styling of the page. One way to prevent distortion or layout issues is to separate the PHP logic from the HTML markup by using PHP include statements to include external files. This allows you to keep your PHP code organized and separate from the HTML, making it easier to maintain and troubleshoot any layout issues that may arise.

<?php include 'header.php'; ?>
<div class="content">
    <!-- Your HTML content here -->
</div>
<?php include 'footer.php'; ?>