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PayUMoney Payment Gateway Integration in PHP

PayUMoney is the best payment gateway from India. You can easily integrate PayU in your Website or App to let your customer to pay through Credit Cards, Debit Cards, Net Banking and more. So here in this tutorial we are going to explain how to integrate PayUMoney gateway in your web application using PHP.

You will also like related tutorial to Integrate Payment Gateways

Its very easy to integrate, you just need to follow very easy steps to integrate it into you web application.

Step 1. First you need to go https://test.payumoney.com and sign up as a merchant account.

Step 2. At time of sign up, you need to use your valid email address. As you are creating test account, you can enter whatever details for the testing purpose.

Step 3. Once you’re done with your test merchant account live, you will get your Merchant Id, Merchant Key, and Merchant Salt to use in your code.

Below is the complete code to integrate PayUMoney payment gateway:

Index.php: This is the complete PHP script to handle PayUMoney payment gateway functionality.
<?php
// Merchant key here as provided by Payu
$MERCHANT_KEY = "<Merchant Key>";
// Merchant Salt as provided by Payu
$SALT = "<Salt>";
// Change to https://secure.payu.in for LIVE mode
$PAYU_BASE_URL = "https://test.payu.in";
$action = '';
$posted = array();
if(!empty($_POST)) {
foreach($_POST as $key => $value) {
$posted[$key] = $value;
}
}
$formError = 0;
if(empty($posted['txnid'])) {
// Generate random transaction id
$txnid = substr(hash('sha256', mt_rand() . microtime()), 0, 20);
} else {
$txnid = $posted['txnid'];
}
$hash = '';
// Hash Sequence
$hashSequence = "key|txnid|amount|productinfo|firstname|email|udf1|udf2|udf3|udf4|udf5|udf6|udf7|udf8|udf9|udf10";
if(empty($posted['hash']) && sizeof($posted) > 0) {
if(
empty($posted['key'])
|| empty($posted['txnid'])
|| empty($posted['amount'])
|| empty($posted['firstname'])
|| empty($posted['email'])
|| empty($posted['phone'])
|| empty($posted['productinfo'])
|| empty($posted['surl'])
|| empty($posted['furl'])
|| empty($posted['service_provider'])
) {
$formError = 1;
} else {
//$posted['productinfo'] = json_encode(json_decode('[{"name":"tutionfee","description":"","value":"500","isRequired":"false"},{"name":"developmentfee","description":"monthly tution fee","value":"1500","isRequired":"false"}]'));
$hashVarsSeq = explode('|', $hashSequence);
$hash_string = '';
foreach($hashVarsSeq as $hash_var) {
$hash_string .= isset($posted[$hash_var]) ? $posted[$hash_var] : '';
$hash_string .= '|';
}
$hash_string .= $SALT;
$hash = strtolower(hash('sha512', $hash_string));
$action = $PAYU_BASE_URL . '/_payment';
}
} elseif(!empty($posted['hash'])) {
$hash = $posted['hash'];
$action = $PAYU_BASE_URL . '/_payment';
}
?>
<html>
<head>
<script>
var hash = '<?php echo $hash ?>';
function submitForm() {
if(hash == '') {
return;
}
var payuForm = document.forms.payuForm;
payuForm.submit();
}
</script>
</head>
<body onLoad="submitForm()">
<h2>PayU Form</h2>
<br/>
<?php if($formError) { ?>
<span style="color:red">Please fill all mandatory fields.</span>
<br/>
<br/>
<?php } ?>
<form action="<?php echo $action; ?>" method="post" name="payuForm">
<input type="hidden" name="key" value="<?php echo $MERCHANT_KEY ?>" />
<input type="hidden" name="hash" value="<?php echo $hash ?>"/>
<input type="hidden" name="txnid" value="<?php echo $txnid ?>" />
<table>
<tr>
<td><b>Mandatory Parameters</b></td>
</tr>
<tr>
<td>Amount: </td>
<td><input name="amount" value="<?php echo (empty($posted['amount'])) ? '' : $posted['amount'] ?>" /></td>
<td>First Name: </td>
<td><input name="firstname" id="firstname" value="<?php echo (empty($posted['firstname'])) ? '' : $posted['firstname']; ?>" /></td>
</tr>
<tr>
<td>Email: </td>
<td><input name="email" id="email" value="<?php echo (empty($posted['email'])) ? '' : $posted['email']; ?>" /></td>
<td>Phone: </td>
<td><input name="phone" value="<?php echo (empty($posted['phone'])) ? '' : $posted['phone']; ?>" /></td>
</tr>
<tr>
<td>Product Info: </td>
<td colspan="3"><textarea name="productinfo"><?php echo (empty($posted['productinfo'])) ? '' : $posted['productinfo'] ?></textarea></td>
</tr>
<tr>
<td>Success URI: </td>
<td colspan="3"><input name="surl" value="<?php echo (empty($posted['surl'])) ? '' : $posted['surl'] ?>" size="64" /></td>
</tr>
<tr>
<td>Failure URI: </td>
<td colspan="3"><input name="furl" value="<?php echo (empty($posted['furl'])) ? '' : $posted['furl'] ?>" size="64" /></td>
</tr>
<tr>
<td colspan="3"><input type="hidden" name="service_provider" value="payu_paisa" size="64" /></td>
</tr>
<tr>
<?php if(!$hash) { ?>
<td colspan="4"><input type="submit" value="Submit" /></td>
<?php } ?>
</tr>
</table>
</form>
</body>
</html>

Success.php: This is the PHP script that handle functionality when payment process done successfully. The details after successful transaction returned to this script. This script is called in index.php
<?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"];
$salt="yIEkykqEH3";
If (isset($_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 "Thank You. Your order status is ". $status .";
echo "Your Transaction ID for this transaction is ".$txnid.";
echo "We have received a payment of Rs. " . $amount . ". Your order will soon be shipped.";
}
?>

Failure.php: This is the PHP script that handles functionality when transaction get failed due to any error. The transaction failure details returned to this script when transaction failed. This script is called in index.php

<?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"];
$salt="yIEkykqEH3";
If (isset($_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 "Your order status is ". $status .";
echo "Your transaction id for this transaction is ".$txnid.". You may try making the payment by clicking the link below.";
}
?>

The above code is also available in sdk you download from PayUMoney. You just need to replace key with your key. To test this code you can fill form and after that when you redirects to PayUMoney Payment gateway to perform test transaction.

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