<?php
// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0

/*
 *  ABOUT THIS PHP SAMPLE: This sample is part of the SDK for PHP Developer Guide topic at
 * https://docs.aws.amazon.com/sdk-for-php/v3/developer-guide/sqs-examples-dead-letter-queues.html
 *
 */
// snippet-start:[sqs.php.dead_letter_queue.complete]
// snippet-start:[sqs.php.dead_letter_queue.import]
require 'vendor/autoload.php';

use Aws\Exception\AwsException;
use Aws\Sqs\SqsClient;

// snippet-end:[sqs.php.dead_letter_queue.import]

/**
 * Enable Dead Letter Queue
 *
 * This code expects that you have AWS credentials set up per:
 * https://docs.aws.amazon.com/sdk-for-php/v3/developer-guide/guide_credentials.html
 */
// snippet-start:[sqs.php.dead_letter_queue.main]
$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());
}

// snippet-end:[sqs.php.dead_letter_queue.main]
// snippet-end:[sqs.php.dead_letter_queue.complete]