#php: convert string UTF-8 to ASCII by Regex

function replace($text)
{
// replace non letter or digits by -
$text = preg_replace('~[^\\pL\d]+~u', '-', $text);

// trim
$text = trim($text, '-');

// transliterate
$text = iconv('utf-8', 'us-ascii//TRANSLIT', $text);

// lowercase
$text = strtolower($text);

// remove unwanted characters
$text = preg_replace('~[^-\w]+~', '', $text);

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

return $te