[HELP] The data type of client ID

I don't have a lot of samples, so I cannot test.

But can anyone tell me the data type of the client ID of an MCPE client? Signed or not signed (will it be negative) long, int or short is the best for saving it with low memory usage? (I am making a single-file database with binary data saving with Utils::writeLong() etc.)

Like?

Do you mean the entity id? That's an unsigned long (32 bit, big endian byte order)

Client ID, the one sent from the MCPE client. ($clientID at Player::__construct())

Entity ID is the one by the server.

Oh ok, it's a 64 bit unsigned integer: http://wiki.vg/Pocket_Minecraft_Protocol

So an unsigned long?

Yes, but in the mcpe protocol documentation they call it an integer.

Wow v0.7.3 #11

I saw it call double too. Then should I use Utils::writeDouble() or Utils::writeLong()?

I'm not sure about that. writeDouble() just uses the pack() function of php which size is system dependent, writeLong() uses a method that I can't understand but looks like a non system dependent double (64 bit). I would go for writeLong()

Thanks!