How to list the Queues in Amazan?

1. Method:

// List queues

$sqs = new AmazonSQS();

$response = $sqs->list_queues();

// Success?

var_dump($response->isOK());

2.Method

// List queues with prefix 'a'

$sqs = new AmazonSQS();

$response = $sqs->list_queues(array(

'QueueNamePrefix' => 'a'));

// Success?

var_dump($response->isOK());