<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\RoleManagement\DeviceManagement\RoleAssignments\RoleAssignmentsRequestBuilderGetRequestConfiguration;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestConfiguration = new RoleAssignmentsRequestBuilderGetRequestConfiguration();
$queryParameters = RoleAssignmentsRequestBuilderGetRequestConfiguration::createQueryParameters();
$queryParameters->filter = " principalIds/any(x:x eq '564ae70c-73d9-476b-820b-fb61eb7384b9')";
$requestConfiguration->queryParameters = $queryParameters;
$result = $graphServiceClient->roleManagement()->deviceManagement()->roleAssignments()->get($requestConfiguration)->wait();