尝试通过AWS SNS推送时出错＆＃34; ARN相对部分的斜杠数量错误。＆＃34;

Question

我尝试从Here调整源代码，但它返回错误＆＃34; ARN的相对部分中的斜杠数量错误。＆＃34;我谷歌它但无法找到任何与此错误相关的信息。我该怎么做才能发表。

    <?php

require '<path to this file>/aws.phar';
use Aws\Sns\SnsClient;

if(isset($_POST['submit']))
{
    $push_message = $_POST['push_message'];

    if(!empty($push_message))
    {
        // Create a new Amazon SNS client
        $sns = SnsClient::factory(array(
            'key'    => '<access key>',
            'secret' => '<app secret>',
            'region' => '<region code>'
            ));

        // region code samples: us-east-1, ap-northeast-1, sa-east-1, ap-southeast-1, ap-southeast-2, us-west-2, us-gov-west-1, us-west-1, cn-north-1, eu-west-1

        $iOS_AppArn = "<iOS app's Application ARN>";
        $android_AppArn = "<android app's Application ARN>";

        // Get the application's endpoints
        $iOS_model = $sns->listEndpointsByPlatformApplication(array('PlatformApplicationArn' => $iOS_AppArn));
        $android_model = $sns->listEndpointsByPlatformApplication(array('PlatformApplicationArn' => $android_AppArn));

        // Display all of the endpoints for the iOS application
        foreach ($iOS_model['Endpoints'] as $endpoint)
        {
            $endpointArn = $endpoint['EndpointArn'];
            echo $endpointArn;
        }

        // Display all of the endpoints for the android application
        foreach ($iOS_model['Endpoints'] as $endpoint)
        {
            $endpointArn = $endpoint['EndpointArn'];
            echo $endpointArn;
        }

        // iOS: Send a message to each endpoint
        foreach ($iOS_model['Endpoints'] as $endpoint)
        {
            $endpointArn = $endpoint['EndpointArn'];

            try
            {
                $sns->publish(array('Message' => $push_message,
                    'TargetArn' => $endpointArn));

                echo "<strong>Success:</strong> ".$endpointArn."<br/>";
            }
            catch (Exception $e)
            {
                echo "<strong>Failed:</strong> ".$endpointArn."<br/><strong>Error:</strong> ".$e->getMessage()."<br/>";
            }
        }

        // android: Send a message to each endpoint
        foreach ($android_model['Endpoints'] as $endpoint)
        {
            $endpointArn = $endpoint['EndpointArn'];

            try
            {
                $sns->publish(array('Message' => $push_message,
                    'TargetArn' => $endpointArn));

                echo "<strong>Success:</strong> ".$endpointArn."<br/>";
            }
            catch (Exception $e)
            {
                echo "<strong>Failed:</strong> ".$endpointArn."<br/><strong>Error:</strong> ".$e->getMessage()."<br/>";
            }
        }
    }
}   
?>