<?php
use Microsoft\Graph\GraphServiceClient;
use Microsoft\Graph\Generated\Models\UnifiedRoleManagementPolicyExpirationRule;
use Microsoft\Graph\Generated\Models\UnifiedRoleManagementPolicyRuleTarget;
use Microsoft\Graph\Generated\Models\UnifiedRoleManagementPolicyRuleTargetOperations;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new UnifiedRoleManagementPolicyExpirationRule();
$requestBody->setOdataType('#microsoft.graph.unifiedRoleManagementPolicyExpirationRule');
$requestBody->setId('Expiration_EndUser_Assignment');
$requestBody->setIsExpirationRequired(true);
$requestBody->setMaximumDuration(new \DateInterval('PT1H45M'));
$target = new UnifiedRoleManagementPolicyRuleTarget();
$target->setOdataType('microsoft.graph.unifiedRoleManagementPolicyRuleTarget');
$target->setCaller('EndUser');
$target->setOperations([new UnifiedRoleManagementPolicyRuleTargetOperations('all'), ]);
$target->setLevel('Assignment');
$target->setInheritableSettings([ ]);
$target->setEnforcedSettings([ ]);
$requestBody->setTarget($target);
$result = $graphServiceClient->policies()->roleManagementPolicies()->byUnifiedRoleManagementPolicyId('unifiedRoleManagementPolicy-id')->rules()->byUnifiedRoleManagementPolicyRuleId('unifiedRoleManagementPolicyRule-id')->patch($requestBody)->wait();