private static function encodeFlags(Header $header): int
    {
        return 0x0 |
            ($header->isResponse() & 0x1) << 15 |
            ($header->getOpcode() & 0xf) << 11 |
            ($header->isAuthoritative() & 0x1) << 10 |
            ($header->isTruncated() & 0x1) << 9 |
            ($header->isRecursionDesired() & 0x1) << 8 |
            ($header->isRecursionAvailable() & 0x1) << 7 |
            ($header->getZ() & 0x7) << 4 |
            ($header->getRcode() & 0xf);
    }
private static function encodeFlags(Header $header): int
    {
        return 0x0 |
            ($header->isResponse() & 0x1) << 15 |
            ($header->getOpcode() & 0xf) << 11 |
            ($header->isAuthoritative() & 0x1) << 10 |
            ($header->isTruncated() & 0x1) << 9 |
            ($header->isRecursionDesired() & 0x1) << 8 |
            ($header->isRecursionAvailable() & 0x1) << 7 |
            ($header->getZ() & 0x7) << 4 |
            ($header->getRcode() & 0xf);
    }
private static function encodeFlags ( Header $ header ) : int { return 0x0 | ( $ header -> isResponse ( ) & 0x1 ) << 15 | ( $ header -> getOpcode ( ) & 0xf ) << 11 | ( $ header -> isAuthoritative ( ) & 0x1 ) << 10 | ( $ header -> isTruncated ( ) & 0x1 ) << 9 | ( $ header -> isRecursionDesired ( ) & 0x1 ) << 8 | ( $ header -> isRecursionAvailable ( ) & 0x1 ) << 7 | ( $ header -> getZ ( ) & 0x7 ) << 4 | ( $ header -> getRcode ( ) & 0xf ) ; }
Encode the bit field of the Header between "ID" and "QDCOUNT".

@param Header $header

@return int
Encode the bit field of the Header between ID and QDCOUNT .