How to use PayUmoney Checkout or Payment method using PHP

Inthis post I am going to explain how to setup PayUmoney payment gateway in your web application. Integration of PayU gateway is a little confusing for the first time and also some of my readers request me for this tutorial. Most of the thing is already in PayU documentation I am just going to explain it in step so you will easily integrate without reading the whole document.

Index.php

<?php
session_start();

if(strcasecmp($_SERVER['REQUEST_METHOD'], 'POST') == 0){
    //Request hash
    $contentType = isset($_SERVER["CONTENT_TYPE"]) ? trim($_SERVER["CONTENT_TYPE"]) : '';    
    if(strcasecmp($contentType, 'application/json') == 0){
        $data = json_decode(file_get_contents('php://input'));
        $hash=hash('sha512', $data->key.'|'.$data->txnid.'|'.$data->amount.'|'.$data->productinfo.'|'.$data->firstname.'|'.$data->email.'|||||'.$data->udf5.'||||||'.$data->salt);
        $json=array();
        $json['success'] = $hash;
        $_SESSION['salt'] = $data->salt;
        echo json_encode($json);
    
    }
    exit(0);
}
 
function getCallbackUrl()
{
    $protocol = ((!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off') || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://";
    $uri = str_replace('/index.php','/',$_SERVER['REQUEST_URI']);
    return $protocol . $_SERVER['HTTP_HOST'] . $uri . 'response.php';
}

$action = 'https://secure.payu.in/_payment';

?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>PayUBiz PHP7 Kit</title>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>

</head>
<style type="text/css">
    .main {
        margin-left:30px;
        font-family:Verdana, Geneva, sans-serif, serif;
    }
    .text {
        float:left;
        width:180px;
    }
    .dv {
        margin-bottom:5px;
    }
</style>
<body>
<div class="main">
    <div>
        <img src="images/logo.png" />
    </div>
    <div>
        <h3>PayUBiz PHP7 Kit</h3>
    </div>
    
    <form action="<?php echo $action; ?>" id="payment_form" method="post">
    <input type="hidden" id="udf5" name="udf5" value="PayUBiz_PHP7_Kit" />
    <input type="hidden" id="surl" name="surl" value="<?php echo getCallbackUrl(); ?>" />
    <input type="hidden" id="furl" name="furl" value="<?php echo getCallbackUrl(); ?>" />
    <input type="hidden" id="curl" name="curl" value="<?php echo getCallbackUrl(); ?>" />
    <div class="dv">
    <span class="text"><label>Merchant Key:</label></span>
    <span><input type="text" id="key" name="key" placeholder="Merchant Key" value="" /></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>Merchant Salt:</label></span>
    <span><input type="text" id="salt" name="salt" placeholder="Merchant Salt" value="" /></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>Transaction/Order ID:</label></span>
    <span><input type="text" id="txnid" name="txnid" placeholder="Transaction ID" value="<?php echo  "Txn" . rand(10000,99999999)?>" /></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>Amount:</label></span>
    <span><input type="text" id="amount" name="amount" placeholder="Amount" value="6.00" /></span>    
    </div>
    
    <div class="dv">
    <span class="text"><label>Product Info:</label></span>
    <span><input type="text" id="productinfo" name="productinfo" placeholder="Product Info" value="P01,P02" /></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>First Name:</label></span>
    <span><input type="text" id="firstname" name="firstname" placeholder="First Name" value="" /></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>Last Name:</label></span>
    <span><input type="text" id="Lastname" name="Lastname" placeholder="Last Name" value="" /></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>Zip Code:</label></span>
    <span><input type="text" id="Zipcode" name="Zipcode" placeholder="Zip Code" value="" /></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>Email ID:</label></span>
    <span><input type="text" id="email" name="email" placeholder="Email ID" value="" /></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>Mobile/Cell Number:</label></span>
    <span><input type="text" id="phone" name="phone" placeholder="Mobile/Cell Number" value="" /></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>Address1:</label></span>
    <span><input type="text" id="address1" name="address1" placeholder="Address1" value="" /></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>Address2:</label></span>
    <span><input type="text" id="address2" name="address2" placeholder="Address2" value="" /></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>City:</label></span>
    <span><input type="text" id="city" name="city" placeholder="City" value="" /></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>State:</label></span>
    <span><input type="text" id="state" name="state" placeholder="State" value="" /></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>Country:</label></span>
    <span><input type="text" id="country" name="country" placeholder="Country" value="" /></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>PG:</label></span>
    <span><input type="text" id="Pg" name="Pg" placeholder="PG" value="CC" /></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>Hash:</label></span>
    <span><input type="text" id="hash" name="hash" placeholder="Hash" value="" /></span>
    </div>
    
    
    <div><input type="button" id="btnsubmit" name="btnsubmit" value="Pay" onclick="frmsubmit(); return true;" /></div>
    </form>
</div>
<script type="text/javascript"><!--
function frmsubmit()
{
    document.getElementById("salt").remove(); //Salt should not be passed over internet for extra security
    document.getElementById("payment_form").submit();    
    return true;
}
//-->
</script>
<script type="text/javascript"><!--
$('#payment_form').bind('keyup blur', function(){
    $.ajax({
          url: 'index.php',
          type: 'post',
          data: JSON.stringify({
            key: $('#key').val(),
            salt: $('#salt').val(),
            txnid: $('#txnid').val(),
            amount: $('#amount').val(),
            productinfo: $('#productinfo').val(),
            firstname: $('#firstname').val(),
            email: $('#email').val(),            
            udf5: $('#udf5').val()
          }),
          contentType: "application/json",
          dataType: 'json',
          success: function(json) {
            if (json['success']) {    
                $('#hash').val(json['success']);
            }
          }
        });
});
//-->
</script>
</body>
</html>
   

 

Response.php

 

<?php
session_start();
$postdata = $_POST;
$msg = '';
$salt = '9rH5kuC8';
// $_SESSION['salt']; //Salt should not be passed over internet for extra security

if (isset($postdata ['key'])) {
    $key                =   $postdata['key'];
    $txnid                 =     $postdata['txnid'];
    $amount              =     $postdata['amount'];
    $productInfo          =     $postdata['productinfo'];
    $firstname            =     $postdata['firstname'];
    $email                =    $postdata['email'];
    $udf5                =   $postdata['udf5'];    
    $status                =     $postdata['status'];
    $resphash            =     $postdata['hash'];
    //Calculate response hash to verify    
    $keyString               =      $key.'|'.$txnid.'|'.$amount.'|'.$productInfo.'|'.$firstname.'|'.$email.'|||||'.$udf5.'|||||';
    $keyArray               =     explode("|",$keyString);
    $reverseKeyArray     =     array_reverse($keyArray);
    $reverseKeyString    =    implode("|",$reverseKeyArray);
    $CalcHashString     =     strtolower(hash('sha512', $salt.'|'.$status.'|'.$reverseKeyString));
    
    
    if ($status == 'success'  && $resphash == $CalcHashString) {
        $msg = "Transaction Successful and Hash Verified...";
        //Do success order processing here...
        // if success then show that information, you have successfully purchased the prodcuct

 


    }
    else {
        //tampered or failed show message -> unable to buy product
        $msg = "Payment failed for Hash not verified...";

 

    }
}
else exit(0);
?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>PayUBiz PHP7 Kit</title>
</head>
<style type="text/css">
    .main {
        margin-left:30px;
        font-family:Verdana, Geneva, sans-serif, serif;
    }
    .text {
        float:left;
        width:180px;
    }
    .dv {
        margin-bottom:5px;
    }
</style>
<body>
<div class="main">
    <div>
        <img src="images/logo.png" />
    </div>
    <div>
        <h3>PHP7 PayUBiz Response</h3>
    </div>
    
    <div class="dv">
    <span class="text"><label>Merchant Key:</label></span>
    <span><?php echo $key; ?></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>Merchant Salt:</label></span>
    <span><?php echo $salt; ?></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>Transaction/Order ID:</label></span>
    <span><?php echo $txnid; ?></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>Amount:</label></span>
    <span><?php echo $amount; ?></span>    
    </div>
    
    <div class="dv">
    <span class="text"><label>Product Info:</label></span>
    <span><?php echo $productInfo; ?></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>First Name:</label></span>
    <span><?php echo $firstname; ?></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>Email ID:</label></span>
    <span><?php echo $email; ?></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>Hash:</label></span>
    <span><?php echo $resphash; ?></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>Transaction Status:</label></span>
    <span><?php echo $status; ?></span>
    </div>
    
    <div class="dv">
    <span class="text"><label>Message:</label></span>
    <span><?php echo $msg; ?></span>
    </div>
    
    <br />
    <br />
    <div class="dv">
    <span class="text"><label><a href="./">New Order</a></label></span>    
    </div>
    
</div>
</body>
</html>
   

Click on the below link to download the source code

 

How to use PayUmoney Checkout or Payment method using PHP

 

For more clarity watch video


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