<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Identity\ConditionalAccess\Policies\PoliciesRequestBuilderGetRequestConfiguration;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestConfiguration = new PoliciesRequestBuilderGetRequestConfiguration();
$queryParameters = PoliciesRequestBuilderGetRequestConfiguration::createQueryParameters();
$queryParameters->filter = "displayName eq 'SimplePolicy1' or displayName eq 'SimplePolicy2'";
$requestConfiguration->queryParameters = $queryParameters;
$result = $graphServiceClient->identity()->conditionalAccess()->policies()->get($requestConfiguration)->wait();