How can I connect Flash to a back-end PHP application server?
I’d normally recommend Flash Remoting as the easiest way to do this, but that does require ColdFusion MX as your app server. For using stock Flash MX 2004 Pro to exchange data with a PHP/mySQL database using XML, check out Sajid Saiyed’s Developer Center tutorial. I’d also recommend looking into either amfphp, or PHPObject as two open source remoting solutions on top of PHP/mySQL. Sephiroth’s site is a goldmine of information on this subject as well- make sure to bookmark it!