<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Models\UnifiedRoleEligibilityScheduleRequest;
use Microsoft\Graph\Beta\Generated\Models\RequestSchedule;
use Microsoft\Graph\Beta\Generated\Models\ExpirationPattern;
use Microsoft\Graph\Beta\Generated\Models\ExpirationPatternType;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new UnifiedRoleEligibilityScheduleRequest();
$requestBody->setAction('AdminAssign');
$requestBody->setJustification('Assign User Admin eligibility to IT Helpdesk (User) group');
$requestBody->setRoleDefinitionId('fdd7a751-b60b-444a-984c-02652fe8fa1c');
$requestBody->setDirectoryScopeId('/');
$requestBody->setPrincipalId('07706ff1-46c7-4847-ae33-3003830675a1');
$scheduleInfo = new RequestSchedule();
$scheduleInfo->setStartDateTime(new \DateTime('2021-07-01T00:00:00Z'));
$scheduleInfoExpiration = new ExpirationPattern();
$scheduleInfoExpiration->setEndDateTime(new \DateTime('2022-06-30T00:00:00Z'));
$scheduleInfoExpiration->setType(new ExpirationPatternType('afterDateTime'));
$scheduleInfo->setExpiration($scheduleInfoExpiration);
$requestBody->setScheduleInfo($scheduleInfo);
$result = $graphServiceClient->roleManagement()->directory()->roleEligibilityScheduleRequests()->post($requestBody)->wait();