Directory Structure & Path Configuration

<?php
//directory-settings.php
// Define DIRECTORY_SEPARATOR shortcut
if (!defined('DS')) {
    define('DS', DIRECTORY_SEPARATOR);
}

// Define ROOT_PATH (Project Root Directory)
define('ROOT_PATH', realpath(__DIR__ . DS . '..' . DS . '..') . DS);

// Define BASE_PATH (App Directory)
define('BASE_PATH', realpath(__DIR__ . DS . '..') . DS);
?>