Flash and PHP

Question

Hi, let's say I have a dynamic text field (variable name is "txt") that I wanted to read from a PHP file and output the contents from there.
My AS code is:
var myPHP:LoadVars = new LoadVars();
myPHP.load("variables.php"); //my php file
myPHP.onLoad = function(success:Boolean){
          if (success) {
                    txt= myPHP.msg; //displaying contents from php
PHP code in variables.php:
<?php
// Define Variables
$msg = ($_GET['msg']);
// Send it to Flash
echo "msg=$msg";
?>
If I key in the url as follows and send something to the msg:
variables.php?msg=Hello
It will echo "msg=Hello", but the text field inside flash turns out to be empty, not undefined or anything. If however I hardcode the php file with:
$msg = "Hello";
It will still echo "msg=Hello" but the flash file will display the text accordingly.
Can anyone tell me why? Thanks!

Answer 1

if you want to read data, you'll use the load part of sendAndLoad.  and, if you're not sending any data, you'll need to hardcord your variables.  how else will you php assign variable values?
but i'm pretty sure you want to be able to do both send variables and receive variables.
so, use:
var sendLV:LoadVars = new LoadVars();
var receiveLV:LoadVars = new LoadVars();
sendLV.send_msg="some message";
sendLV.sendAndLoad("variables.php",receiveLV,"POST"); //my php file
receiveLV.onLoad = function(success:Boolean){
          if (success) {
                    txt= this.return_msg; //displaying contents from php
<?php
// Define Variables
$msg = ($_POST['send_msg']);
// Send it to Flash
echo "return_msg=$msg";
?>