Php in flash mx

1

hello, i’m very new to flash but i’m trying to create a full flash site. My site uses paypal and has a guestbook. i guess in order to put the paypal shopping cart i need to use PHP code. i don’t know what that is really, but i know what code i need to alter to make it work. But, i don’t know where to put it in the flash document. if anyone knows more about this or where i can go to learn more about this the information would be appreciated. thank you