<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Models\Call;
use Microsoft\Graph\Beta\Generated\Models\CallDirection;
use Microsoft\Graph\Beta\Generated\Models\ParticipantInfo;
use Microsoft\Graph\Beta\Generated\Models\IdentitySet;
use Microsoft\Graph\Beta\Generated\Models\Identity;
use Microsoft\Graph\Beta\Generated\Models\InvitationParticipantInfo;
use Microsoft\Graph\Beta\Generated\Models\Modality;
use Microsoft\Graph\Beta\Generated\Models\AppHostedMediaConfig;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new Call();
$requestBody->setOdataType('#microsoft.graph.call');
$requestBody->setDirection(new CallDirection('outgoing'));
$requestBody->setSubject('Create a group call with app hosted media');
$requestBody->setCallbackUri('https://bot.contoso.com/callback');
$source = new ParticipantInfo();
$source->setOdataType('#microsoft.graph.participantInfo');
$sourceIdentity = new IdentitySet();
$sourceIdentity->setOdataType('#microsoft.graph.identitySet');
$sourceIdentityApplication = new Identity();
$sourceIdentityApplication->setOdataType('#microsoft.graph.identity');
$sourceIdentityApplication->setDisplayName('TestBot');
$sourceIdentityApplication->setId('dd3885da-f9ab-486b-bfae-85de3d445555');
$sourceIdentity->setApplication($sourceIdentityApplication);
$source->setIdentity($sourceIdentity);
$requestBody->setSource($source);
$targetsInvitationParticipantInfo1 = new InvitationParticipantInfo();
$targetsInvitationParticipantInfo1->setOdataType('#microsoft.graph.invitationParticipantInfo');
$targetsInvitationParticipantInfo1Identity = new IdentitySet();
$targetsInvitationParticipantInfo1Identity->setOdataType('#microsoft.graph.identitySet');
$targetsInvitationParticipantInfo1IdentityUser = new Identity();
$targetsInvitationParticipantInfo1IdentityUser->setOdataType('#microsoft.graph.identity');
$targetsInvitationParticipantInfo1IdentityUser->setDisplayName('user1');
$targetsInvitationParticipantInfo1IdentityUser->setId('98da8a1a-1b87-452c-a713-65d3f10b5555');
$targetsInvitationParticipantInfo1Identity->setUser($targetsInvitationParticipantInfo1IdentityUser);
$targetsInvitationParticipantInfo1->setIdentity($targetsInvitationParticipantInfo1Identity);
$targetsArray []= $targetsInvitationParticipantInfo1;
$targetsInvitationParticipantInfo2 = new ParticipantInfo();
$targetsInvitationParticipantInfo2->setOdataType('#microsoft.graph.participantInfo');
$targetsInvitationParticipantInfo2Identity = new IdentitySet();
$targetsInvitationParticipantInfo2Identity->setOdataType('#microsoft.graph.identitySet');
$targetsInvitationParticipantInfo2IdentityUser = new Identity();
$targetsInvitationParticipantInfo2IdentityUser->setOdataType('#microsoft.graph.identity');
$targetsInvitationParticipantInfo2IdentityUser->setDisplayName('user2');
$targetsInvitationParticipantInfo2IdentityUser->setId('bf5aae9a-d11d-47a8-93b1-782504c95555');
$targetsInvitationParticipantInfo2Identity->setUser($targetsInvitationParticipantInfo2IdentityUser);
$targetsInvitationParticipantInfo2->setIdentity($targetsInvitationParticipantInfo2Identity);
$targetsArray []= $targetsInvitationParticipantInfo2;
$requestBody->setTargets($targetsArray);
$requestBody->setRequestedModalities([new Modality('audio'),]);
$mediaConfig = new AppHostedMediaConfig();
$mediaConfig->setOdataType('#microsoft.graph.appHostedMediaConfig');
$mediaConfig->setBlob('<Media Session Configuration>');
$mediaConfig->setRemoveFromDefaultAudioGroup(false);
$requestBody->setMediaConfig($mediaConfig);
$requestBody->setTenantId('aa67bd4c-8475-432d-bd41-39f255720e0a');
$result = $graphServiceClient->communications()->calls()->post($requestBody)->wait();