Jyxo\StringUtil::crc PHP Method

    public static function crc(string $string) : int
    {
        $crc = crc32($string);
        if ($crc & 0x80000000) {
            $crc ^= 0xffffffff;
            $crc++;
            $crc = -$crc;
        }
        return $crc;
    }