transfer file from AWS s3 budget to ec2 instance using php

I have been working on a project where we will have a website process on EC2 server. In my project, I was able to write a php code that allow users to upload file from web server to AWS S3 budget. However, in order to access that file from EC2, i think we need to transfer file from S3 budget to EC2 instance. I saw that there is a unix command line way to do that, but the project i'm working on is based on PHP/HTML/JSON. I wonder is there a way or tutorial to access or transfer file from S3 to EC2 instance using PHP?
Thanks