What are the alternatives to using frames in PHP development for managing content display?

Using frames in PHP development for managing content display can lead to issues with SEO, accessibility, and overall website performance. Instead of frames, developers can use PHP include or require statements to include separate files into a main PHP file for content management. This approach allows for better organization of code, easier maintenance, and improved performance.

<?php
// main.php
include 'header.php';
include 'content.php';
include 'footer.php';
?>