$dir_upload = "/www/";
$list_dir = array();
if ($handle = opendir($dir_upload)):
while (false !== ($catalog = readdir($handle))):
$a = is_dir($catalog);
echo "$catalog - $a<br>";
if (($catalog != "..") && (is_dir($catalog))):
$catalog = "$catalog/";
echo "<br>$catalog";
array_push($list_dir, "<option value=$catalog>".$catalog);
endif;
endwhile;
closedir($handle);
endif;