<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Reports\HealthMonitoring\Alerts\AlertsRequestBuilderGetRequestConfiguration;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestConfiguration = new AlertsRequestBuilderGetRequestConfiguration();
$queryParameters = AlertsRequestBuilderGetRequestConfiguration::createQueryParameters();
$queryParameters->filter = "state eq microsoft.graph.healthmonitoring.alertState'active'";
$queryParameters->select = ["id"," alertType"];
$requestConfiguration->queryParameters = $queryParameters;
$result = $graphServiceClient->reports()->healthMonitoring()->alerts()->get($requestConfiguration)->wait();