How to test connection with php file.

public function processCreate():void {

            var urlVars:URLVariables = new URLVariables();

            var urlFileRequest:URLRequest = new URLRequest("php/controlpanel.php");

            urlFileRequest.method = URLRequestMethod.POST;

            urlFileRequest.data = urlVars;

            var php2Loader:URLLoader = new URLLoader();

            php2Loader.dataFormat = URLLoaderDataFormat.VARIABLES; 

            php2Loader.addEventListener(Event.COMPLETE, showResult);

            urlVars.systemCall = "createprofile";

            urlVars.username = username.text;

            urlVars.password = password.text;

            php2Loader.load(phpFileRequest);

        }

This is my function on a .as file. I want send username and password to php to create a new user profile in mySQL.

I just copy/paste this code I don't know harp what am I doing, I want to do something simple, like trace, but to test the connection between flash and the php/controlpanel.php.

Before I go further adding more codes I want to test if 2 files are properly connected, how do I do that, thannk you.