Lettuce Code

function normalizeString ($s = '') 
{
  $str = htmlentities($s);
  $str = preg_replace("/(&)([a-z])([a-z]+;)/i", '$2', $str);
  $str = preg_replace("/[^A-Z0-9]/i", ' ', $str);
  $str = preg_replace("/\s+/i", ' ', $str);	
  $str = trim($str);
  return $str;
}