mb_ucfirst

Mulibyte versions of ucfirst() which works well with unicode.

function mb_ucfirst($string, $encoding = 'UTF-8') {
  $firstChar = mb_strtoupper(mb_substr($string, 0, 1, $encoding), $encoding);
  return $firstChar . mb_substr($string, 1, mb_strlen($string, $encoding), $encoding);
}