Heard about Flash remoting?

It’s a method for Flash to communicate with a web application server. Here’s how Macromedia defines Flash remoting:

“Macromedia Flash Remoting MX provides the connection between Macromedia Flash and your web application server, making it fast and easy to create Rich Internet Applications. With its powerful yet simple programming model, you can easily integrate rich Macromedia Flash content with applications built using Macromedia ColdFusion MX, Microsoft .NET, Java, and SOAP-based web services.”

AMF-PHP is a project to allow Flash Remoting using PHP. This project was started because Macromedia didn’t provide integration with PHP for Flash Remoting.
Here’s a tutorial from sephiroth.it which shows you how to create an image gallery using Flash and PHP using AMF-PHP:

Link: Create an image gallery with AMFPHP