Flash to PHP variables

[Bottlebank]

Hi, i'd be greatful if someone in the know could check this over for me as its my first php script.

I am sending 5 arrays from Flash to my PHP script called

FirstArray
SecondArray
ThirdArray
OpenItalArray
CloseItalArray

My Php looks like this

<?php

// Recieving the variables.
$FirstArray = $_POST['FirstArray'];
$SecondArray = $_POST['FirstArray'];
$ThirdArray = $_POST['FirstArray'];
$OpenItalArray = $_POST['OpenItalArray'];
$CloseItalArray = $_POST['CloseItalArray'];

//explode the variables

$FirstArray1 = explode($FirstArray);
$SecondArray1 = explode($SecondArray);
$ThirdArray1 = explode($ThirdArray);
$OpenItalArray1 = explode($OpenItalArray);
$CloseItalArray1 = explode($CloseItalArray);



?>

I first want PHP to accept the variable then explode them, can you please let me know where i'm going wrong?

Many thanks

Bottlebank