What are the advantages and disadvantages of splitting a PHP project into multiple files for better organization?

Splitting a PHP project into multiple files can help improve organization by separating different functionalities into smaller, more manageable files. This can make the codebase easier to navigate, maintain, and collaborate on. However, having too many files can lead to increased complexity and potential issues with file dependencies.

// index.php
require_once 'functions.php';
require_once 'database.php';
require_once 'helpers.php';