What are the implications of using iframes versus PHP includes for embedding content within a div element?

When embedding content within a div element, using PHP includes is generally preferred over iframes. PHP includes allow for better control over the content being embedded, as it is directly included in the main HTML file. This results in faster loading times and better SEO performance compared to iframes, which create a separate document within the main HTML file.

<div>
  <?php include 'content.php'; ?>
</div>