<?php
use Microsoft\Graph\GraphServiceClient;
use Microsoft\Graph\Generated\Drives\Item\Items\Item\Copy\CopyPostRequestBody;
use Microsoft\Graph\Generated\Models\ItemReference;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new CopyPostRequestBody();
$parentReference = new ItemReference();
$parentReference->setDriveId('6F7D00BF-FC4D-4E62-9769-6AEA81F3A21B');
$parentReference->setId('DCD0D3AD-8989-4F23-A5A2-2C086050513F');
$requestBody->setParentReference($parentReference);
$requestBody->setName('contoso plan (copy).txt');
$result = $graphServiceClient->drives()->byDriveId('drive-id')->items()->byDriveItemId('driveItem-id')->copy()->post($requestBody)->wait();