AWS SDK for PHP
Developer Guide

Using Dead Letter Queues in Amazon SQS with AWS SDK for PHP Version 3

A dead letter queue is one that other (source) queues can target for messages that can't be processed successfully. You can set aside and isolate these messages in the dead letter queue to determine why their processing did not succeed. You must individually configure each source queue that sends messages to a dead letter queue. Multiple queues can target a single dead letter queue.

To learn more, see Using SQS Dead Letter Queues.

The following example shows how to:

All the example code for the AWS SDK for PHP Version 3 is available here on GitHub.

Credentials

Before running the example code, configure your AWS credentials, as described in Credentials for the AWS SDK for PHP Version 3. Then import the AWS SDK for PHP, as described in Basic Usage Patterns of the AWS SDK for PHP Version 3.

Enable a Dead Letter Queue

Imports

require 'vendor/autoload.php'; use Aws\Sqs\SqsClient; use Aws\Exception\AwsException;

Sample Code

$queueUrl = "QUEUE_URL"; $client = new SqsClient([ 'profile' => 'default', 'region' => 'us-west-2', 'version' => '2012-11-05' ]); try { $result = $client->setQueueAttributes([ 'Attributes' => [ 'RedrivePolicy' => "{\"deadLetterTargetArn\":\"DEAD_LETTER_QUEUE_ARN\",\"maxReceiveCount\":\"10\"}" ], 'QueueUrl' => $queueUrl // REQUIRED ]); var_dump($result); } catch (AwsException $e) { // output error message if fails error_log($e->getMessage()); }