pocketmine\Player::sendChunk PHP Method

    public function sendChunk($x, $z, $payload, $ordering = FullChunkDataPacket::ORDER_COLUMNS)
    {
        if ($this->connected === false) {
            return;
        }
        $this->usedChunks[Level::chunkHash($x, $z)] = true;
        $this->chunkLoadCount++;
        if ($payload instanceof DataPacket) {
            $this->dataPacket($payload);
        } else {
            $pk = new FullChunkDataPacket();
            $pk->chunkX = $x;
            $pk->chunkZ = $z;
            $pk->order = $ordering;
            $pk->data = $payload;
            $this->batchDataPacket($pk);
        }
        if ($this->spawned) {
            foreach ($this->level->getChunkEntities($x, $z) as $entity) {
                if ($entity !== $this and !$entity->closed and $entity->isAlive()) {
                    $entity->spawnTo($this);
                }
            }
        }
    }