pocketmine\level\Level::sendBlockExtraData PHP Method

    public function sendBlockExtraData(int $x, int $y, int $z, int $id, int $data, array $targets = null)
    {
        $pk = new LevelEventPacket();
        $pk->evid = LevelEventPacket::EVENT_SET_DATA;
        $pk->x = $x + 0.5;
        $pk->y = $y + 0.5;
        $pk->z = $z + 0.5;
        $pk->data = $data << 8 | $id;
        Server::broadcastPacket($targets === null ? $this->getChunkPlayers($x >> 4, $z >> 4) : $targets, $pk);
    }