How can the file path be properly specified when including a PHP file in a webpage?

When including a PHP file in a webpage, it is important to specify the file path correctly to ensure that the file is found and included successfully. One way to do this is by using the `__DIR__` magic constant to get the directory of the current file and then concatenate the relative path of the included file to it. This ensures that the file path is always relative to the current file's directory.

<?php
include __DIR__ . '/path/to/your/file.php';
?>