<?php

$SECURE_SECRET = "AFDSEFDSFDSFEWFESF";
$vpcURL = $_POST["virtualPaymentClientURL"] . "?";

unset($_POST["virtualPaymentClientURL"]);
unset($_POST["SubButL"]);

$md5HashData = $SECURE_SECRET;
ksort ($_POST);

// set a parameter to show the first pair in the URL
$appendAmp = 0;

foreach($_POST as $key => $value) {
if($key!= 'form'){
// create the md5 input and URL leaving out any fields that have no value
if (strlen($value) > 0) {

// this ensures the first paramter of the URL is preceded by the '?' char
if ($appendAmp == 0) {
$vpcURL .= urlencode($key) . '=' . urlencode($value);
$appendAmp = 1;
} else {
$vpcURL .= '&' . urlencode($key) . "=" . urlencode($value);
}
$md5HashData .= $value;
//echo "<br>".$key."<br>".$value;
}
}
}

// Create the secure hash and append it to the Virtual Payment Client Data if
// the merchant secret has been provided.
if (strlen($SECURE_SECRET) > 0) {
$vpcURL .= "&vpc_SecureHash=" . strtoupper(md5($md5HashData));
}

// FINISH TRANSACTION - Redirect the customers using the Digital Order
// ===================================================================
//echo $vpcURL;
header("Location: ".$vpcURL);

// *******************
// END OF MAIN PROGRAM
// *******************

?>