Create Slug

function create_slug($text)
{

  $text = preg_replace('~[^\\pL\d]+~u', '-', $text);
  $text = trim($text, '-');
  $text = iconv('utf-8', 'us-ascii//TRANSLIT', $text);
  $text = strtolower($text);
  $text = preg_replace('~[^-\w]+~', '', $text);

  if (empty($text))
  {
    return 'n-a';
  }
  return $text;
}