<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Models\PrintTaskTrigger;
use Microsoft\Graph\Beta\Generated\Models\PrintEvent;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new PrintTaskTrigger();
$requestBody->setEvent(new PrintEvent('jobStarted'));
$additionalData = [
'definition@odata.bind' => 'https://graph.microsoft.com/beta/print/taskDefinitions/3203656e-6069-4e10-8147-d25290b00a3c',
];
$requestBody->setAdditionalData($additionalData);
$result = $graphServiceClient->escapedPrint()->printers()->byPrinterId('printer-id')->taskTriggers()->post($requestBody)->wait();