AWS SDK ver1を使って、AWS SQSを利用するサンプルスクリプト。実際の運用に使うには、キューメッセージを受け取る側をデーモン化したり工夫する必要あり。

receive.php

<?php
require_once('/Vendor/aws_sdk/sdk.class.php');

$sqs = new AmazonSQS();
$region = AmazonSQS::REGION_APAC_NE1;
$sqs->set_region($region);
$queueName = 'キュー名';
$queueURL = $sqs->create_queue($queueName)->body->CreateQueueResult->QueueUrl;

while (true) {
    $data = $sqs->receive_message($queueURL);
    if ($data->isOK()) {
        if (isset($data->body->ReceiveMessageResult->Message)) {
            $msgData = $data->body->ReceiveMessageResult->Message;
            $msg = $msgData->Body;
            echo $msg . "\n";
            
            // 削除
            $handle = (string)$msgData->ReceiptHandle;
            $sqs->delete_message($queueURL, $handle);
        } else {
            sleep(1);
        }
    } else {
        echo $data->body->Error->Message . "\n";
    }
}

request.php

<?php
require_once ('Vendor/aws_sdk/sdk.class.php');

$sqs = new AmazonSQS();
$region = AmazonSQS::REGION_APAC_NE1;
$sqs->set_region($region);
$queueName = 'キュー名';
$queueURL = $sqs->create_queue($queueName)->body->CreateQueueResult->QueueUrl;
$data = $sqs->send_message($queueURL, '値' . time());
if ($data->isOK()) {
    echo 'OK';
}