Yes you right about the answer() part I just forgot to replace it, related to the PHP there are many exmaples on this forum and on the internet of using of PHP and Asterisk AMI, This is a support forum I dont think nobody is writing and posting codes, instead we provide a general idea of how to the things can be done, Anyway PHP scripting is not mandory he can use dial plan coding I just gave him an option of the multiples choices , also this theread could help Play audio file on channel that is in ConfBridge