data flag riding

i tried to use data flag riding but nothing happens :/ is it working?

PHP:

if($sender instanceof Player){
       $sender->setDataFlag(Entity::DATA_FLAGS, Entity::DATA_FLAG_RIDING, true);
}

same here nothing happends - think not implemented yet

ok

and please how did you make sound when player join on your server? is it one of this sounds? (bat, click, door, fizz, launch, pop)

yep

Surf into PocketMine-MP API and look for how things work, for sound its pretty easy: $level->addSound(Sound instance)
For riding flag, it just show other players that the current one is "riding", but nothing more will happen unless your code Make it

Yes i know how to asi sound but MCPE contains lots of sounds which arent in pocketmine

And i tried set riding flag but player still stand

The data flag is only to show to other players that that player is riding, but to that player he is still standing.
Extra work needs to be done to support riding fully.
https://github.com/PocketMine/PocketMine-MP/compare/riding-work

But other players see standing player too xD

Then that means data flag riding isn't supposed to work at all.