php 3 directory level down

php-directory-level-down.php

<?php
require_once customization_module_file_path();

/**
 * @return string test.module file path
 */
function customization_module_file_path() {
  // The directory of the file
  $customizationsmodulepath = __DIR__;
  /**
   * Given a string containing the path of a file or directory, this function 
   * will return the parent directory's path that is levels up from the
   * current directory.
   */
  $customizationsmodulepath = dirname($customizationsmodulepath, 3);
  $customizationsmodulefilepath =  $customizationsmodulepath . "/test.module";
  return $customizationsmodulefilepath;
}