Script php de crawl

function ScanDirectory($Directory){

  $MyDirectory = opendir($Directory) or die('Erreur');
 while($Entry = @readdir($MyDirectory)) {
  if(is_dir($Directory.'/'.$Entry)&& $Entry != '.' && $Entry != '..') {
                         echo '<ul>'.$Directory;
   ScanDirectory($Directory.'/'.$Entry);
                        echo '</ul>';
  }
  else {
   echo '<li>'.$Entry.'</li>';
                }
 }
  closedir($MyDirectory);
}

ScanDirectory('.');