title: download whole folder from S3, using php sdk
body: <p>I am trying to  learn PHP SDK S3.</p>
  
  <p>I am able to transfer whole folder from local to S3 bucket using PHP.</p>
  
  <p>Is it possible to copy whole folder from S3 bucket to local, using PHP, if yes then please guide me.</p>
  
  <p>I am unable to do so.</p>