In what situations is it appropriate to prioritize functionality over cosmetic enhancements in PHP web development, especially when catering to a diverse user base with varying browser settings?

When catering to a diverse user base with varying browser settings, it is important to prioritize functionality over cosmetic enhancements in PHP web development. This ensures that the website or application works correctly for all users, regardless of their browser preferences or settings. By focusing on functionality first, you can create a more inclusive and user-friendly experience for all visitors.

<?php
// Code snippet prioritizing functionality over cosmetic enhancements
// Implement necessary functionality here
?>