Anyone know of a good article on Flash + PHP + MySQL

…how flash, php, and mysql communicate with each other when you want to send and receive information to/from a database? I read the tutorials on kirupa, but I didnt find anything. I’m looking for somthing that explains the rules, like for example (hypothetical)if you send vars to php maybe you would have to add actionscript in flash to tell it to wait until you hear somthing back from the script… of course I’m not saying that IS a rule or anything, but thats the kind of info I’m looking for in an article- know what I mean? I need an article that can put these overall concepts in place- any suggestions?