pocketmine\inventory\PlayerInventory::sendSlot PHP Метод

    public function sendSlot($index, $target)
    {
        if ($target instanceof Player) {
            $target = [$target];
        }
        $pk = new ContainerSetSlotPacket();
        $pk->slot = $index;
        $pk->item = clone $this->getItem($index);
        foreach ($target as $player) {
            if ($player === $this->getHolder()) {
                /** @var Player $player */
                $pk->windowid = 0;
                $player->dataPacket(clone $pk);
            } else {
                if (($id = $player->getWindowId($this)) === -1) {
                    $this->close($player);
                    continue;
                }
                $pk->windowid = $id;
                $player->dataPacket(clone $pk);
            }
        }
    }