title: PHP and Amazon S3 as a File Storage System for dynamic website
body: <p>I have a dynamic website on which users can upload different files to be reviewed by different experts.</p>
  
  <p>Users can upload/download their files to/from our server.</p>
  
  <p>How can I use the Amazon S3 and PHP to expand my storage? I already have an AWS account and made a research on the net, but i still can't figure out How to make sure that every user can access only his files and the one he will upload will be in a specific bucket with his username?</p>