'{username}', 'apiKey' => '{apiKey}', )); // 2. Obtain a Networking service object from the client. $networkingService = $client->networkingService(null, '{region}'); // 3. List security group rules $securityGroupRules = $networkingService->listSecurityGroupRules(); foreach ($securityGroupRules as $securityGroupRule) { /** @var $securityGroupRule OpenCloud\Networking\Resource\SecurityGroupRule **/ }