What are the best practices for including files in PHP to ensure correct linking?

When including files in PHP, it is important to use the correct file paths to ensure that the files are linked properly. One best practice is to use the `__DIR__` constant to get the absolute path of the current file and then concatenate it with the relative path of the file you want to include. This helps in avoiding issues with file path resolution and ensures that the files are included correctly.

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