Php 实例化从AwsClient子类扩展的类时出错

我正在扩展自定义Sqs类，如下所示：

class Sqs extends SqsClient
{
    public function __construct()
    {
        parent::__construct(array(
            'credentials' => array(
                'key' => $_ENV['AWS_ACCESS_KEY_ID'],
                'secret' => $_ENV['AWS_SECRET_ACCESS_KEY'],
            ),
            'region' => 'us-west-1',
            'version' => 'latest'
        ));
    }
}

$sqs = new Sqs();
$sqs->sendMessage([
    'QueueUrl' => $_ENV['AWS_SQS_URL_PREFIX'] . '/' . $_ENV['AWS_SQS_READER_USER_CREATE'],
    'MessageBody' => $user_json,
    'MessageGroupId' => 1,
    'MessageDeduplicationId' => uniqid(),
]);

然后我实例化并使用它，如下所示：

class Sqs extends SqsClient
{
    public function __construct()
    {
        parent::__construct(array(
            'credentials' => array(
                'key' => $_ENV['AWS_ACCESS_KEY_ID'],
                'secret' => $_ENV['AWS_SECRET_ACCESS_KEY'],
            ),
            'region' => 'us-west-1',
            'version' => 'latest'
        ));
    }
}

$sqs = new Sqs();
$sqs->sendMessage([
    'QueueUrl' => $_ENV['AWS_SQS_URL_PREFIX'] . '/' . $_ENV['AWS_SQS_READER_USER_CREATE'],
    'MessageBody' => $user_json,
    'MessageGroupId' => 1,
    'MessageDeduplicationId' => uniqid(),
]);

但我有一个奇怪的错误：

The service \"\" is not provided by the AWS SDK for PHP.

---

AWSAPI使用反射来根据类名确定它们连接到的AWS服务。如果是这样的话，你可以试着调用你的类SqsClient，例如

use Aws\Sqs\SqsClient as BaseSqsClient;

class SqsClient extends BaseSqsClient 
{
     //...
}

---

对于将来遇到此问题的任何其他人来说，另一种选择是将

服务作为配置数组中的元素传递也可以：

class MyWafClient extends WafClient
{
    public function __construct(array $args = [])
    {
        $args['service'] = 'waf';
        parent::__construct($args);
    }

    ...
}