why this code is not working?

[addisoncave]

Hi guys I'm working with following codes and it's not working and returning a fetal error that anything must not written outside name space

PHP Code:

<?php
/*
 *@Package Name: lib/includes.php
 *@Date(Last Modified): Tue, Sept 6 - 2016
 */

namespace lib\includes
{
    
    class accessControl
    {
        private function init()
        {
            define('DS',DIRECTORY_SEPARATOR);
            define('ROOT',getcwd().DS);
            /*
             * @var THEME_NAME has been Fetch from Database
             */
            define('THEME_NAME','');
            define('THEME_PATH',ROOT.'mads-content'.DS.'mads-themes'.DS.THEME_NAME.DS);
            define('CONTROL_PATH',ROOT.'mads-admin'.DS.'contoller'.DS);
            define('MODEL_PATH','mads-admin'.DS.''.DS);



        }
    }

}
include_once("config.php");
?>

How to fix this?