<?php
use Microsoft\Graph\GraphServiceClient;
use Microsoft\Graph\Generated\Users\Item\Events\Item\SnoozeReminder\SnoozeReminderPostRequestBody;
use Microsoft\Graph\Generated\Models\DateTimeTimeZone;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new SnoozeReminderPostRequestBody();
$newReminderTime = new DateTimeTimeZone();
$newReminderTime->setDateTime('dateTime-value');
$newReminderTime->setTimeZone('timeZone-value');
$requestBody->setNewReminderTime($newReminderTime);
$graphServiceClient->me()->events()->byEventId('event-id')->snoozeReminder()->post($requestBody)->wait();