<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Models\ItemPublication;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new ItemPublication();
$requestBody->setPublisher('International Association of Branding Management Publishing');
$requestBody->setThumbnailUrl('https://iabm.io/sdhdfhsdhshsd.jpg');
$result = $graphServiceClient->users()->byUserId('user-id')->profile()->publications()->byItemPublicationId('itemPublication-id')->patch($requestBody)->wait();