Markdownify\Converter::unichr PHP Method

    protected function unichr($dec)
    {
        if ($dec < 128) {
            $utf = chr($dec);
        } elseif ($dec < 2048) {
            $utf = chr(192 + ($dec - $dec % 64) / 64);
            $utf .= chr(128 + $dec % 64);
        } else {
            $utf = chr(224 + ($dec - $dec % 4096) / 4096);
            $utf .= chr(128 + ($dec % 4096 - $dec % 64) / 64);
            $utf .= chr(128 + $dec % 64);
        }
        return $utf;
    }