Predis\Cluster\Hash\CRC16::hash PHP Method

    public function hash($value)
    {
        // CRC-CCITT-16 algorithm
        $crc = 0;
        $CCITT_16 = self::$CCITT_16;
        $strlen = strlen($value);
        for ($i = 0; $i < $strlen; ++$i) {
            $crc = ($crc << 8 ^ $CCITT_16[$crc >> 8 ^ ord($value[$i])]) & 0xffff;
        }
        return $crc;
    }