<?php
$status=$_POST["status"];
$firstname=$_POST["firstname"];
$amount=$_POST["amount"];
$txnid=$_POST["txnid"];
$posted_hash=$_POST["hash"];
$key=$_POST["key"];
$productinfo=$_POST["productinfo"];
$email=$_POST["email"];
$salt="84MlXfpY";

If (isset($_POST["additionalCharges"])) {
       $additionalCharges=$_POST["additionalCharges"];
        $retHashSeq = $additionalCharges.'|'.$salt.'|'.$status.'|||||||||||'.$email.'|'.$firstname.'|'.$productinfo.'|'.$amount.'|'.$txnid.'|'.$key;
                  }
	else {	  
        $retHashSeq = $salt.'|'.$status.'|||||||||||'.$email.'|'.$firstname.'|'.$productinfo.'|'.$amount.'|'.$txnid.'|'.$key;
         }
		 $hash = hash("sha512", $retHashSeq);
		 
       if ($hash != $posted_hash) {
	       echo "Invalid Transaction. Please try again";
		   }
	   else {
          echo "<h3>Thank You. Your order status is ". $status .".</h3>";
          echo "<h4>Your Transaction ID for this transaction is ".$txnid.".</h4>";
          echo "<h4>We have received a payment of Rs. " . $amount . ". Your order will soon be shipped.</h4>";
		   }         
?>	


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