send message by AWS SES using AWS SDK for PHP 2

sendEmail.php

#!/usr/bin/php
<?php
require 'AWS_SDK_PHP2/aws-autoloader.php';

use Aws\Ses\SesClient;

$client = SesClient::factory(array(
    'key' => "XXXXXXXXXXXXXXXXXXXX",
    'secret' => "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
    'region' => "us-east-1"
  )
);

$result = $client->sendEmail(array(
    'Source' => 'from_addr@example.co.jp',
    'Destination' => array(
      'ToAddresses' => array('to_adde@test.com')
    ),
    'Message' => array(
      'Subject' => array(
        'Data' => 'this is SES test'
      ),
      'Body' => array(
        'Text' => array(
          'Data' => 'this is test.'
        ),
      ),
    )
  )
);

?>