How to connect to AWS rds mysql through android application?

I have been working on Android-mysql database connection. Initially I was using godaddy server to store my php files. From the Android application I used to make a connection to php files which in turn queried the Mysql database.

I have shifted from godaddy to AWS and I have a RDS and EC2 instance up and running. I know the credentials of the rds instance. The only thing I dont understand is where to put the php file (in godaddy I used to store it in the File Manager and then retrieve it through "hostname/filename.php"). I have searched for lots of tutorials but could not find a satisfactory answer.