In what scenarios would it be beneficial to use "require" instead of "include" in PHP?

When you want to ensure that a file is included only once in your PHP application, it is beneficial to use the "require" statement instead of "include". This can prevent issues such as redeclaring functions or classes multiple times, which can lead to errors in your code. By using "require", you can guarantee that the file is included exactly once, ensuring that your application runs smoothly.

<?php
require_once 'file.php';
?>