我第一次尝试使用PHPAWSSDK("aws/aws-sdk-php":"^3.19")来使用S3。我创建了一个桶:'myfirstbucket-jeremyc'我创建了一个策略:{"Version":"2012-10-17","Statement":[{"Effect":"Allow","Action":["s3:PutObject","s3:GetObject","s3:DeleteObject"],"Resource":["arn:aws:s3:::myfirstbucket-jeremyc/*"]}]}我将该策略应用于一个组，然后在该组中创建了一个用户“s3-myfirstbu