has('inventory', ["AND" => ['itemuuid' => $itemuuid, 'playeruuid' => $_SESSION['uuid']]])) { sendError(INVALID_ITEMID, true); } if (is_empty($player) || !$database->has('players', ['nickname' => $player])) { sendError(INVALID_NICKNAME, true); } $playeruuid = $database->select('players', ['uuid'], ['nickname' => $player])[0]['uuid']; $database->update('inventory', ['playeruuid' => $playeruuid], ['itemuuid' => $itemuuid]); sendOK();