$enc = 'UTF-8'; $word = "РАЗРАБОТАТЬ"; $word = preg_replace('/\s+/', '', $word); $word = mb_convert_case($word, MB_CASE_TITLE, "UTF-8"); $count = mb_strlen($word, $enc); $new_word = mb_substr($word, 0, ($count - 1), $enc); $new_word = $new_word . mb_strtoupper(mb_substr($word,($count - 1), 1, $enc), $enc); $randomLine = $new_word; I need the register of the 1st and last letter to be Upper, only the letter r is always displayed as "?"