Paytm_standard_checkout_demo/callback.php at master · web-dev-nav/Paytm_standard_checkout_demo · GitHub

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<?php
header("Pragma: no-cache");
header("Cache-Control: no-cache");
header("Expires: 0");

// following files need to be included
require_once("./lib/config_paytm.php");
require_once("./lib/encdec_paytm.php");

$paytmChecksum = "";
$paramList = array();
$isValidChecksum = "FALSE";

$paramList = $_POST;
$paytmChecksum = isset($_POST["CHECKSUMHASH"]) ? $_POST["CHECKSUMHASH"] : ""; //Sent by Paytm pg

//Verify all parameters received from Paytm pg to your application. Like MID received from paytm pg is same as your application’s MID, TXN_AMOUNT and ORDER_ID are same as what was sent by you to Paytm PG for initiating transaction etc.
$isValidChecksum = verifychecksum_e($paramList, PAYTM_MERCHANT_KEY, $paytmChecksum); //will return TRUE or FALSE string.

?>

<!DOCTYPE html>
<html lang="en">
<!------ Include the below in your HEAD tag ---------->
<?php
include "include/head.php";
?>
<!------ Include the above in your HEAD tag ---------->
<body class="jumbotron">

  <!------ Include the below in your NAV tag ---------->
  <?php
  include "include/nav.php";
  ?>
  <!------ Include the above in your NAV tag ---------->

<?php
if($isValidChecksum == "TRUE") {

        if ($_POST["STATUS"] == "TXN_SUCCESS")
         { // if success

            echo '<div class="jumbotron text-center">
                    <i class="fas fa-check-circle" style="font-size: 78px;color:#4bc14e;"></i>
                      <h1>Thank You for your purchase!</h1>
                      <small style="padding:10px;background:#ddd;color:#7f7f7f;border-radius:5px;">Transation# '.$_POST["TXNID"].'</small>
                      <a href="kart.php" class="btn btn-success"><i class="fas fa-arrow-circle-left" ></i> Back</a>
                    </div>';


?>
                    <div class="container-fluid">
                      <div class="row ">
                        <div class="col-md-4"></div>
                        <div class="col-md-4">
                          <h4>Your transation status has been successfully processed.</h4>

                          <ul class="list-group">

                                <?php
                                    $i = 0;

                                  if (isset($_POST) && count($_POST)>0 )
                                  {
                                    foreach($_POST as $paramName => $paramValue) {
                                    $i++;

                                       if($i !==3 && $i !==6 && $i !==8 && $i !==10 && $i !==12 && $i !==14) // hidden array values (3=>TXNID,6=>CURRENCYINR,8=>STATUS,10=>RESPMSG,12=>BANKTXNID)
                                       {
                                        echo '<li class="list-group-item">
                                                  <small>(Array no. '.$i.')</small>
                                                  <strong>'.$paramName.'</strong>
                                                  <span class="badge">'.$paramValue.'</span>
                                              </li>';

                                        continue;
                                       }


                                    }
                                  }


                                ?>


                        </ul>
                        </div>

                      </div>
                    </div>


<?php
        }
        else {
        //if failure

           echo '<div class="jumbotron text-center">
                <i class="fas fa-times-circle text-danger" style="font-size: 78px;"></i>
                  <h1>Transaction status failure!</h1>
                   <a href="kart.php" class="btn btn-success"><i class="fas fa-arrow-circle-left" ></i> Back</a>
                </div>';
?>

        <div class="container-fluid">
                      <div class="row ">

                        <div class="col-md-8" style="margin-left: 300px;">
                          <h4>Your transation status has been failed.</br>
                            Paytm Responce code:
                           <a href="https://developer.paytm.com/assets/Transaction%20response%20codes%20and%20messages.pdf" target="_blank">PDF</a> </h4></br>


                          <ul class="list-group">
                            <?php


                                  if (isset($_POST) && count($_POST)>0 )
                                  {


                                    echo '<li class="list-group-item">
                                                  <strong>RESPCODE</strong>
                                                  <span class="badge">'.$_POST['RESPCODE'].'</span>
                                              </li>';

                                    echo '<li class="list-group-item">
                                                  <strong>RESPMSG</strong>
                                                  <span class="badge">'.$_POST['RESPMSG'].'</span>
                                              </li>';


                                }


                                ?>


                        </ul>
                        </div>

                      </div>
                    </div>


<?php
        }
?>


<?php
}
else {
       //if checksum not match

           echo '<div class="jumbotron text-center">
                <i class="fas fa-times-circle text-danger" style="font-size: 78px;"></i>
                  <h1>Checksum mismatched.!</h1>
                     <small style="padding:10px;background:#ddd;color:#7f7f7f;border-radius:5px;">Process transaction is suspicious. Someone altered the transaction details.</small>
                      <a href="kart.php" class="btn btn-success"><i class="fas fa-arrow-circle-left" ></i> Back</a>
                </div>';
}

?>


</body>
</html>