PHP: /** @var Player $player */$inventory = $player->getInventory();$items = [];foreach ($inventory->getContents() as $slot => $item) { $items[$slot] = $item->nbtSerialize(-1, "Item");}file_put_contents($this->getDataFolder().'config.sl', serialize($items)); PHP: $inventory = unserialize(file_get_contents($this->getDataFolder().'config.sl'));$items = [];foreach ($inventory as $slot => $item) { $items[$slot] = $item->nbtDeserialize();}$player->getInventory()->setContents($items);