<?php
use Microsoft\Graph\GraphServiceClient;
use Microsoft\Graph\Generated\Drives\Item\Items\Item\Workbook\Tables\Item\Rows\Add\AddPostRequestBody;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new AddPostRequestBody();
$requestBody->setIndex(5);
$requestBody->setValues([ [1,2,3], [4,5,6], ]);
$result = $graphServiceClient->drives()->byDriveId('drive-id')->items()->byDriveItemId('driveItem-id')->workbook()->tables()->byWorkbookTableId('workbookTable-id')->rows()->add()->post($requestBody)->wait();