CAN SOMEONE HElp me with this code??

[softz]

Hey can anyone help me with the following codes, and wat it all means and what i need to change

<?php 
$A = $_POST['MyData1']; 
echo "&MyData1REturn=".strrev($A)."&"; 
$B = $_POST['MyData2']; 
echo "&MyData2REturn=".strtoupper($B)."&"; 
?>

ActionScript:

var result_lv:LoadVars = new LoadVars();
result_lv.onLoad = function(success:Boolean) {
     if (success) {
          trace(this.MyData1REturn);
          trace(this.MyData2REturn);
     } else {
          trace("Error connecting to server.");
     }
};
var send_lv:LoadVars = new LoadVars();
send_lv.MyData1 = "WhatEver";
send_lv.MyData2 = "Xeef is the grreatest";
send_lv.sendAndLoad("http://serried.net/test.php", result_lv, "POST");

its mean to send a varable from php to flash but im lost


someone sent me this as an asnwer to a question, but it makes no sense