code: private function processLoad($path, $loadType = 'require_once')
      {
          $ans = false;
          if (file_exists($path)) {
              switch ($loadType) {
                  default:
                  case "require_once":
                      require_once($path);
                      $ans = true;
                      break;
                  case "require":
                      require($path);
                      $ans = true;
                      break;
                  case "include_once":
                      include_once($path);
                      $ans = true;
                      break;
                  case "include":
                      include($path);
                      $ans = true;
                      break;
              }
          }
          return $ans;
      }
docs: @brief load file
  
  @param string $path path to load
  @param string $loadType switch of
  - require_once
  - require
  - include_once
  - include
  
  @return bool