What are some best practices for handling file paths and file inclusions in PHP to avoid errors like the one described in the forum thread?

The issue described in the forum thread is likely due to incorrect file paths or file inclusions in PHP. To avoid such errors, it is recommended to use absolute paths when including files, especially when dealing with files in different directories. Additionally, using PHP's built-in functions like `__DIR__` or `dirname(__FILE__)` can help in constructing correct file paths dynamically.

// Example of including a file using absolute path
include_once(__DIR__ . '/path/to/file.php');