<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Models\Ediscovery\ReviewSetQuery;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new ReviewSetQuery();
$requestBody->setDisplayName('My Query 1');
$requestBody->setQuery('(subject:\"Quarterly Financials\")');
$result = $graphServiceClient->compliance()->ediscovery()->cases()->byCaseId('case-id')->reviewSets()->byReviewSetId('reviewSet-id')->queries()->post($requestBody)->wait();