Elastic BeanstalkでAWS_SECRET_ACCESS_KEYとAWS_ACCESS_KEY_IDを環境変数に入れた時のウェブアプリ内でのS3Client::factoryの仕方

s3client_factory_from_ini_credentials.php

<?php

require __DIR__.'/../vendor/autoload.php';

use Aws\S3\S3Client;
use Aws\Common\Enum\Region;
use Aws\Common\Enum\ClientOptions;
use Aws\Common\Credentials\Credentials;

$credentials = Credentials::fromIni('your-profile-name');
$s3_client = S3Client::factory(array(
                ClientOptions::CREDENTIALS => $credentials,
            ));

var_dump($s3_client);
/*
目的通りのものが出るはず
object(Aws\S3\S3Client)#17 (17) {
  ["directory":protected]=>
  string(50) "/var/app/current/vendor/aws/aws-sdk-php/src/Aws/S3"
  ["credentials":protected]=>
  object(Aws\Common\Credentials\Credentials)#2 (4) {
    ["key":protected]=>
    string(20) "XXXXXXXXXXXXXXXXXX"
    ["secret":protected]=>
    string(40) "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
    ["token":protected]=>
    NULL
    ["ttd":protected]=>
    NULL
  }
*/