How to deploy the source code on multiple application server in AWS Load Balancer


We are shifting our PHP web application on cloud using AWS (Amezon Web Services) with Load Balancer architecture.

While deploying any new code currently we are deploying the files separately on each application server.

I want to know is there any better automated way for transferring the files (releasing the code) on multiple server at a time.

Please let me know the thoughts on it or solution on it.!!!