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This is the PHP code used to respond the Flash's XML request:

<?php

// include onesandzeros.biz phpXML Lite parser class
include( "phpXML.class.php" );

// lose the slashes in the XML and parse it into a new tree
$xml = new phpXML( stripslashes( $_POST['xml'] ) );

// dig out the username and password sent from Flash
$username = $xml->childNodes[0]->attributes["username"];
$password = $xml->childNodes[0]->attributes["password"];

// output the response XML back to Flash
header( "Content-type: text/xml" );

if( $password == "pokey" )
    // respond positively if they send us the "good" password
    echo "<response status=\"OK\">Login GOOD! Welcome to the chat system, " . $username . "!</response>";
else
    // otherwise, send a bad response
    echo "<response status=\"ERROR\">Login BAD. Password was inccorect (received: " . $username . ", " . $password . ").</response>";

?>

The Flash code looks like this:

stop();

var xmlRequest:XML;
var xmlResponse:XML = new XML();

xmlResponse.ignoreWhite = true;
xmlResponse.onLoad = function ( success:Boolean ) {
	if( success ) { 
		txtStatus.text += "From PHP: ";
		if( xmlResponse.firstChild.attributes.status == "OK" ) {
			txtStatus.text += unescape( xmlResponse.firstChild.firstChild.nodeValue ) +
				 "[newline char]"
		} else {
			txtStatus.text += unescape( xmlResponse.firstChild.firstChild.nodeValue ) +
				 "[newline char]"
		}
		// Password was inccorect (received: '', '').
		txtStatus.text += "[newline char]Raw XML:[newline char]" +
			 unescape( xmlResponse.toString() ) +
			 "[newline char]";
	} else {
		txtStatus.text += "ERROR: Could not connect to server.[newline char]";
	}
};

mcBtnGo.onPress = function () {
	txtStatus.text += "Attempting to login '" + txtUsername.text + "'...[newline char]";
	xmlRequest = new XML( "" );
	xmlRequest.xmlDecl = "xml=";
	xmlRequest.sendAndLoad( "flashrespond.php", xmlResponse );
};

mcBtnClear.onPress = function () {
	txtStatus.text = "";
};

mcBtnClear.txtLabel.text = "Clear";