Im new to ActionScript and Flex 3... im trying to develop an MVC 100% OOP application with Flex 3 using MXML,AS3 and PHP.

M (PHP) V (MXML) C (AS3)

The 3 layers i choose for my development. I have 10 AS3 classes that are object related between them and some inherit or implement interfaces.

The only problem here is how to interact 100% OOP with my model. In this case my model has to be a PHP Class that needs to be called from AS3 (the controller).

For example the AS3 class : Patient have a method called Save:

    public function Save(data:Array) : void
    {
        /* PHP call - model layer */
    }

I want to create an instance of my PHP Patient Model class that connects to the DB and insert the data array into it.

What should i use ? how can i also return a variable to AS3 ? What happen to as3 if there is a cached Exception in PHP ?

Thanks in advanced :)