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

PayUMoney payment gateway integration in php

Live Demo

Steps for integration PayUMoney gateway.

Step 1. Go to https://test.payumoney.com/ and sign up as a merchant account.

Step 2. At time of sign up use your valid email.

Step 3. Fill all required business details. Use this details for PAN no. ABCDE1234F and DOB – 01/04/1990 .

Step 4. Add your bank detail, note you can add whatever bank name and details use this IFSC – ALLA0212632 in place of IFSC.

Step 5. Don’t worry about bank details verification this is your test account.

Step 6. Once your required steps are completed your account is live if not then write mail to support team : [email protected]

PayUMoney payment gateway integration php

Step 7. Now once above steps are complete you can get your key go to Manage Account ⇒ My Account ⇒ Merchant -Key Salt copy your key and paste in your code.

PayUMoney payment gateway integration php

Once you follow above step your setup for PayUMoney is complete.

Sample Code

index.php

<?php
// Merchant key here as provided by Payu
$MERCHANT_KEY = "hDkYGPQe";

// Merchant Salt as provided by Payu
$SALT = "yIEkykqEH3";

// End point - change to https://secure.payu.in for LIVE mode
$PAYU_BASE_URL = "https://test.payu.in";

$action = '';

$posted = array();
if(!empty($_POST)) {
    //print_r($_POST);
  foreach($_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 $hash ?>';
    function submitPayuForm() {
      if(hash == '') {
        return;
      }
      var payuForm = document.forms.payuForm;
      payuForm.submit();
    }
  </script>
  </head>
  <body onload="submitPayuForm()">
    <h2>PayU Form</h2>
    <br/>
    <?php if($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>
          <td><b>Optional Parameters</b></td>
        </tr>
        <tr>
          <td>Last Name: </td>
          <td><input name="lastname" id="lastname" value="<?php echo (empty($posted['lastname'])) ? '' : $posted['lastname']; ?>" /></td>
          <td>Cancel URI: </td>
          <td><input name="curl" value="" /></td>
        </tr>
        <tr>
          <td>Address1: </td>
          <td><input name="address1" value="<?php echo (empty($posted['address1'])) ? '' : $posted['address1']; ?>" /></td>
          <td>Address2: </td>
          <td><input name="address2" value="<?php echo (empty($posted['address2'])) ? '' : $posted['address2']; ?>" /></td>
        </tr>
        <tr>
          <td>City: </td>
          <td><input name="city" value="<?php echo (empty($posted['city'])) ? '' : $posted['city']; ?>" /></td>
          <td>State: </td>
          <td><input name="state" value="<?php echo (empty($posted['state'])) ? '' : $posted['state']; ?>" /></td>
        </tr>
        <tr>
          <td>Country: </td>
          <td><input name="country" value="<?php echo (empty($posted['country'])) ? '' : $posted['country']; ?>" /></td>
          <td>Zipcode: </td>
          <td><input name="zipcode" value="<?php echo (empty($posted['zipcode'])) ? '' : $posted['zipcode']; ?>" /></td>
        </tr>
        <tr>
          <td>UDF1: </td>
          <td><input name="udf1" value="<?php echo (empty($posted['udf1'])) ? '' : $posted['udf1']; ?>" /></td>
          <td>UDF2: </td>
          <td><input name="udf2" value="<?php echo (empty($posted['udf2'])) ? '' : $posted['udf2']; ?>" /></td>
        </tr>
        <tr>
          <td>UDF3: </td>
          <td><input name="udf3" value="<?php echo (empty($posted['udf3'])) ? '' : $posted['udf3']; ?>" /></td>
          <td>UDF4: </td>
          <td><input name="udf4" value="<?php echo (empty($posted['udf4'])) ? '' : $posted['udf4']; ?>" /></td>
        </tr>
        <tr>
          <td>UDF5: </td>
          <td><input name="udf5" value="<?php echo (empty($posted['udf5'])) ? '' : $posted['udf5']; ?>" /></td>
          <td>PG: </td>
          <td><input name="pg" value="<?php echo (empty($posted['pg'])) ? '' : $posted['pg']; ?>" /></td>
        </tr>
        <tr>
          <?php if(!$hash) { ?>
            <td colspan="4"><input type="submit" value="Submit" /></td>
          <?php } ?>
        </tr>
      </table>
    </form>
  </body>
</html>

success.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 "<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>";
           
		   }         
?>

failure.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 "<h3>Your order status is ". $status .".</h3>";
         echo "<h4>Your transaction id for this transaction is ".$txnid.". You may try making the payment by clicking the link below.</h4>";
          
		 } 
?>
<!--Please enter your website homepagge URL -->
<p><a href=http://localhost/testing/success_failure/PayUMoney_form.php> Try Again</a></p>

Above code is also available in sdk you download from PayUMoney you 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 select debit card and enter bellow details in it:

Test Card Number: 5123456789012346
Test CVV: 123
Test Expiry: May 2017

Hope this help you.