Refresh my memory

Can someone just clarify one little question.
to load php vars into flash can i use this method

myButton.onRelease = function(){
var loadObj:LoadVars = new LoadVars();
loadObj.load(“loadvar.php”);
}

mytext.text = loadObj.sitename;

PHP:
<?php
$sitename = “BLAHHHHHHHHHHHHHHHHHHH”;
?>

cheers