<select name="select2" id="label">
              <?php
				  $current_dir = '/firma/foto/';
  $dir = opendir($current_dir);

  
 
  while ($file = readdir($dir))
  {
      echo '<option value="'.$file.'">'.$file.'</option>'
  }
  
  closedir($dir);
					?>
			  </select>