aws-sdk-php v3 sns不适合我

Question

I really want to publish a lambda subscriber to an SNS topic. It works in amazon console, but with php-sdk it does not. When I execute the php code and I look in CloudWatch, there's nothing (no response). Why my SNS did not work?

it is my code, but it does not working:

....

$credentials = new Credentials($access, $secret);

$this->aws_client = new SnsClient(
     array(
       'region' => 'us-east-1',
       'version' => 'latest',//'version' => '2010-03-31',
       'credentials' => $credentials
      )
 );

...

$message = "Hello H.";

$message_atr = array('String' => array('DataType' => 'String', 'StringValue' => $message));

$payload = array(
       'TargetArn' => 'arn:aws:sns:us-east-1:****:mysns',
       'Message' => $message,
       'MessageAttributes' => $message_atr,
);

$this->aws_client->publish($payload);