TrueBV\Punycode::charToCodePoint PHP Method

    protected function charToCodePoint($char)
    {
        $code = ord($char[0]);
        if ($code < 128) {
            return $code;
        } elseif ($code < 224) {
            return ($code - 192) * 64 + (ord($char[1]) - 128);
        } elseif ($code < 240) {
            return ($code - 224) * 4096 + (ord($char[1]) - 128) * 64 + (ord($char[2]) - 128);
        } else {
            return ($code - 240) * 262144 + (ord($char[1]) - 128) * 4096 + (ord($char[2]) - 128) * 64 + (ord($char[3]) - 128);
        }
    }