In what scenarios would it be advisable to avoid using frames and instead handle the functionality with pure PHP?

It would be advisable to avoid using frames when you need more control over the functionality and behavior of your website. Frames can limit the flexibility of your site and can cause issues with search engine optimization. Instead, handling the functionality with pure PHP allows for more customization and control over how your website operates.

<?php
// PHP code to handle functionality without frames
// Your code here
?>