/**
  * getListForDirectories
  */
 public function getListForDirectories($directories)
 {
     if (!is_array($directories)) {
         return false;
     }
     /**
      * pass find param
      */
     switch ($this->GET['type']) {
         case 'd':
             $find_param = '-type d';
             break;
         default:
             $find_param = '';
             break;
     }
     /**
      * get list
      */
     require_once 'models/common/common_file.php';
     $File = new common_file();
     $list = array();
     foreach ($directories as $directory_prefix) {
         $directory = $directory_prefix . $this->GET['directory'];
         if (file_exists($directory) && is_dir($directory)) {
             $list_single = $File->getTree($directory, $find_param);
         } else {
             $list_single = array();
         }
         $list = array_merge($list, $list_single);
     }
     if (is_array($list)) {
         return $list;
     } else {
         return false;
     }
 }