I have create one application for media company and we have used aws services mturk in this application. also we have used many services of aws like RDS,EC2,simpleDB,s3 and mturk. so we have creating one library for integrate mturk services into our application.so in this library, we have covered all operation of mturk. so we can easily integrate mturk php library into our application.
You can download this mturk api library from below url :
http://sourceforge.net/projects/sandip2451984.u/files/
Thanks
Sandip Limbachiya