How can separating PHP and JavaScript code improve the overall structure and maintainability of a PHP application, according to the discussion?

Separating PHP and JavaScript code can improve the overall structure and maintainability of a PHP application by promoting better organization and separation of concerns. This separation allows for cleaner code that is easier to read, debug, and maintain. Additionally, it can make collaboration between frontend and backend developers more efficient.

<?php
// PHP code
?>

<script>
// JavaScript code
</script>