Integrate CCAvenue Payment Gateway using PHP

CCAvenue is a popular Payment Gateway that allows e-transaction. It is designed to integrate quickly and hassle free. This is authorized by Indian financial institutions and one of the most secure payment gateway to transact money for an online e-commerce/shopping. I will explain you step by step process to Integrate CCAvenue Payment Gateway using PHP for accept online payment.This is a very simple example, you can just copy paste and change according to your requirement.

Also Read : Stripe Payment Gateway Integration in Codeigniter using cURL

Steps 1: Create Account and integrate CCAvenue Payment Gateway

Create Merchant Account.
Login to Merchant Dashboard and download CCAvenue payment integration kit.
CCAvenue verify your website and provide all required details like Marchant ID, Working Key etc.
Configure CCAvenue security keys and (test/live) endpoint in your PHP application.
Create Payment form and deploy request / response handlers and with the guidance of the integration kit.
Create return pages for handling payment notification on success or cancel.

The following screenshot shows the CCAvenue merchant sign-up form used to create a new account as the first step of this payment integration.

Before started to implement the Integrate CCAvenue Payment Gateway using PHP, look files structure:

integrate-ccavenue-payment-gateway-using-php
- css
  - style.css
- images
- templates
  - header.php
  - footer.php
- config.php
- index.php
- ccAvenueRequestHandler.php
- Crypto.php
- ccAvenueResponseHandler.php

Step 2: Create a file named index (index.php)

<?php 
require_once "config.php";
?>
<?php include('templates/header.php');?>
<div id="ccav-payment-form">
<form name="frmPayment" action="ccAvenueRequestHandler.php" method="POST">
<input type="hidden" name="merchant_id" value="<?php echo CCA_MERCHANT_ID; ?>"> 
<input type="hidden" name="language" value="EN"> 
<input type="hidden" name="currency" value="INR"> 
<input type="hidden" name="redirect_url" value="http://localhost/integrate-ccavenue-payment-gateway-using-php/ccavResponseHandler.php"> 
<input type="hidden" name="cancel_url" value="http://localhost/integrate-ccavenue-payment-gateway-using-php/ccavResponseHandler.php"> 
<section class="showcase">
  <div class="container">
    <div class="pb-2 mt-4 mb-2 border-bottom">
      <h2>Integrate CCAvenue Payment Gateway using PHP</h2>
    </div>
    <div class="row align-items-center">
       <div class="form-group col-md-12">
        <label for="inputEmail4">Amount</label>
        <input type="text" class="form-control" id="amount" name="amount" placeholder="amount" value="1.00" readonly="readonly">
      </div>
  </div>
    <div class="row align-items-center">
       <div class="form-group col-md-12">
        <label for="inputEmail4">Name</label>
        <input type="text" class="form-control" id="name" name="name" placeholder="Name" value="">
      </div>
  </div>
    <div class="row align-items-center">  
      <div class="form-group col-md-12">
        <label for="inputEmail4">Address</label>
        <input type="email" class="form-control" id="address" name="address" placeholder="Address" value="">
      </div>
    </div>
    <div class="row justify-content-start mt-4">
      <div class="col">
        <button type="submit" class="btn btn-primary mt-4 float-right btn-payment">Pay Now</button>
      </div>
    </div>
</div>
</section>
</form>
</div>
<?php include('templates/footer.php');?>

<?php

require_once "config.php";

<?php include('templates/header.php');?>

<h2>Integrate CCAvenue Payment Gateway using PHP</h2>

</div>

<label for="inputEmail4">Amount</label>

</div>

</div>

<label for="inputEmail4">Address</label>

</div>

</div>

</section>

</form>

</div>

<?php include('templates/footer.php');?>

Step 3 : Create a file named ccAvenueRequestHandler (ccAvenueRequestHandler.php)

<html>
<head>
<title>Integrate CCAvenue Payment Gateway using PHP</title>
</head>
  <body>
    <center>
    <?php 
    include('config.php'); 
      include('Crypto.php');
      // config file
      error_reporting(0);
      $merchant_data='';
      $working_key = CCAVENUE_WORKING_KEY;
      $access_code = CCAVENUE_ACCESS_CODE;
      foreach ($_POST as $key => $value){
        $merchant_data.=$key.'='.$value.'&';
      }
      $merchant_data .= "order_id=".$orderId;

      $encrypted_data=encrypt($merchant_data,$working_key); 

      ?>
      <form method="post" name="redirect" action="https://test.ccavenue.com/transaction/transaction.do?command=initiateTransaction">
      <?php
      echo "<input type=hidden name=encRequest value=$encrypted_data>";
      echo "<input type=hidden name=access_code value=$access_code>";
    ?>
    </form>
    </center>
    <script language='javascript'>document.redirect.submit();</script>
  </body>
</html>

<html>

<head>

<title>Integrate CCAvenue Payment Gateway using PHP</title>

</head>

<body>

<?php

include('config.php');

include('Crypto.php');

// config file

error_reporting(0);

$merchant_data='';

$working_key = CCAVENUE_WORKING_KEY;

$access_code = CCAVENUE_ACCESS_CODE;

foreach ($_POST as $key => $value){

$merchant_data.=$key.'='.$value.'&';

}

$merchant_data .= "order_id=".$orderId;

$encrypted_data=encrypt($merchant_data,$working_key);

<?php

echo "<input type=hidden name=encRequest value=$encrypted_data>";

echo "<input type=hidden name=access_code value=$access_code>";

</form>

</center>

</body>

</html>

Step 4: Create a file named Crypto (Crypto.php)

This file contains the functions to encrypt or decrypt the payment information posted via the HTML

<?php
error_reporting(0);
function encrypt($plainText,$key) {
  $secretKey = hextobin(md5($key));
  $initVector = pack("C*", 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f);
    $openMode = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '','cbc', '');
    $blockSize = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, 'cbc');
  $plainPad = pkcs5_pad($plainText, $blockSize);
    if (mcrypt_generic_init($openMode, $secretKey, $initVector) != -1) 
  {
        $encryptedText = mcrypt_generic($openMode, $plainPad);
              mcrypt_generic_deinit($openMode);
              
  } 
  return bin2hex($encryptedText);
}
function decrypt($encryptedText,$key) {
  $secretKey = hextobin(md5($key));
  $initVector = pack("C*", 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f);
  $encryptedText=hextobin($encryptedText);
    $openMode = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '','cbc', '');
  mcrypt_generic_init($openMode, $secretKey, $initVector);
  $decryptedText = mdecrypt_generic($openMode, $encryptedText);
  $decryptedText = rtrim($decryptedText, "\0");
  mcrypt_generic_deinit($openMode);
  return $decryptedText;
  
}

//Padding Function
 function pkcs5_pad ($plainText, $blockSize) {
    $pad = $blockSize - (strlen($plainText) % $blockSize);
    return $plainText . str_repeat(chr($pad), $pad);
}

// Hexadecimal to Binary function for php 4.0 version 
function hextobin($hexString) { 
  $length = strlen($hexString); 
  $binString="";   
  $count=0; 
  while($count<$length) {       
      $subString =substr($hexString,$count,2);           
      $packedString = pack("H*",$subString); 
      if ($count==0) {
      $binString=$packedString;
      }  else   {
      $binString.=$packedString;
      }       
      $count+=2; 
  } 
    return $binString; 
} 
?>

<?php

error_reporting(0);

function encrypt($plainText,$key) {

$secretKey = hextobin(md5($key));

$initVector = pack("C*", 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f);

$openMode = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '','cbc', '');

$blockSize = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, 'cbc');

$plainPad = pkcs5_pad($plainText, $blockSize);

if (mcrypt_generic_init($openMode, $secretKey, $initVector) != -1)

{

$encryptedText = mcrypt_generic($openMode, $plainPad);

mcrypt_generic_deinit($openMode);

}

return bin2hex($encryptedText);

}

function decrypt($encryptedText,$key) {

$secretKey = hextobin(md5($key));

$initVector = pack("C*", 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f);

$encryptedText=hextobin($encryptedText);

$openMode = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '','cbc', '');

mcrypt_generic_init($openMode, $secretKey, $initVector);

$decryptedText = mdecrypt_generic($openMode, $encryptedText);

$decryptedText = rtrim($decryptedText, "\0");

mcrypt_generic_deinit($openMode);

return $decryptedText;

}

//Padding Function

function pkcs5_pad ($plainText, $blockSize) {

$pad = $blockSize - (strlen($plainText) % $blockSize);

return $plainText . str_repeat(chr($pad), $pad);

}

// Hexadecimal to Binary function for php 4.0 version

function hextobin($hexString) {

$length = strlen($hexString);

$binString="";

$count=0;

while($count<$length) {

$subString =substr($hexString,$count,2);

$packedString = pack("H*",$subString);

if ($count==0) {

$binString=$packedString;

} else {

$binString.=$packedString;

}

$count+=2;

}

return $binString;

}

Step 5: Create a file named ccAvenueResponseHandler (ccAvenueResponseHandler.php)

<?php
include('Crypto.php');
// config file
require_once('config.php'); 
error_reporting(0);
$msg = '';
$workingKey=CCAVENUE_WORKING_KEY; //Working Key.
$encResponse=$_POST["encResp"];     //This is the response sent by the CCAvenue Server
$rcvdString=decrypt($encResponse,$workingKey);  //Crypto Decryption used as per the specified working key.
$order_status="";
$decryptValues=explode('&', $rcvdString);
$dataSize=sizeof($decryptValues);

for($i = 0; $i < $dataSize; $i++) 
{
  $information=explode('=',$decryptValues[$i]);
  if($i==3) $order_status=$information[1];
}

if($order_status==="Success") {
  $msg = '<div class="alert alert-success" role="alert">Thank you for shopping with us. Your credit card has been charged and your transaction is successful. We will be shipping your order to you soon.</div>';   
}
else if($order_status==="Aborted") {
  $msg =  '<div class="alert alert-danger" role="alert">Thank you for shopping with us.We will keep you posted regarding the status of your order through e-mail</div>';  
}
else if($order_status==="Failure") {
  $msg =  '<div class="alert alert-danger" role="alert">Thank you for shopping with us.However,the transaction has been declined.</div>';
}
else {
  $msg =  '<div class="alert alert-danger" role="alert">Security Error. Illegal access detected</div>'; 
}
?>

<?php include('templates/header.php');?>
<section class="showcase">
  <div class="container">
    <div class="pb-2 mt-4 mb-2 border-bottom">
      <h2>Integrate CCAvenue Payment Gateway using PHP</h2>
    </div>
    <div class="row">       
      <div class="col-md-12"><?php echo $msg; ?></div>
    </div>
  
  <?php
  if(!empty($dataSize)) {
    for($i = 0; $i < $dataSize; $i++) {
      $information=explode('=',$decryptValues[$i]);
        echo '<div class="row"><div class="col-md-12"><?php print $information[0]; ?>: <?php echo $information; ?></div></div>';
    }
  } ?>
</div>
</section>
<?php include('templates/footer.php');?>

<?php

include('Crypto.php');

// config file

require_once('config.php');

error_reporting(0);

$msg = '';

$workingKey=CCAVENUE_WORKING_KEY; //Working Key.

$encResponse=$_POST["encResp"]; //This is the response sent by the CCAvenue Server

$rcvdString=decrypt($encResponse,$workingKey); //Crypto Decryption used as per the specified working key.

$order_status="";

$decryptValues=explode('&', $rcvdString);

$dataSize=sizeof($decryptValues);

for($i = 0; $i < $dataSize; $i++)

{

$information=explode('=',$decryptValues[$i]);

if($i==3) $order_status=$information[1];

}

if($order_status==="Success") {

$msg = '<div class="alert alert-success" role="alert">Thank you for shopping with us. Your credit card has been charged and your transaction is successful. We will be shipping your order to you soon.</div>';

}

else if($order_status==="Aborted") {

$msg = '<div class="alert alert-danger" role="alert">Thank you for shopping with us.We will keep you posted regarding the status of your order through e-mail</div>';

}

else if($order_status==="Failure") {

$msg = '<div class="alert alert-danger" role="alert">Thank you for shopping with us.However,the transaction has been declined.</div>';

}

else {

$msg = '<div class="alert alert-danger" role="alert">Security Error. Illegal access detected</div>';

}

<?php include('templates/header.php');?>

<h2>Integrate CCAvenue Payment Gateway using PHP</h2>

</div>

</div>

<?php

if(!empty($dataSize)) {

for($i = 0; $i < $dataSize; $i++) {

$information=explode('=',$decryptValues[$i]);

echo '<div class="row"><div class="col-md-12"><?php print $information[0]; ?>: <?php echo $information; ?></div></div>';

}

} ?>

</div>

</section>

<?php include('templates/footer.php');?>

Step 6: Create files named (header and footer)

Create a view files named header.php and footer.php inside “templates” folder.

This view contains the headerand footer section of the webpage. The Bootstrap library is used to provide a better UI, so, include it in the header and footer section.

header.php

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
  <meta name="description" content="">
  <meta name="author" content="">

  <title>Integrate CCAvenue Payment Gateway using PHP | Tech Arise</title>
  <link rel="icon" type="image/ico" href="<?php print HTTP_IMAGE_PATH; ?>favicon.ico">
  <!-- Bootstrap core CSS -->
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.3.1/css/bootstrap.min.css" />
  <!-- Custom fonts for this template -->
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.7.2/css/all.min.css" />
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/simple-line-icons/2.4.1/css/simple-line-icons.css" />
  <link href="https://fonts.googleapis.com/css?family=Lato:300,400,700,300italic,400italic,700italic" rel="stylesheet" type="text/css">
  <!-- Custom styles for this template -->
  <link href="css/style.css" rel="stylesheet">
</head>
<body>
  <!-- Navigation -->
  <nav class="navbar navbar-expand-lg navbar-dark bg-dark static-top header-bg-dark" style="background: ##FFFFFF!;">
  <div class="container">
    <a class="navbar-brand font-weight-bold" href="https://techarise.com"><h1>Tech Arise</h1></a>
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarResponsive" aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation">
          <span class="navbar-toggler-icon"></span>
        </button>
    <div class="collapse navbar-collapse" id="navbarResponsive">
      <ul class="navbar-nav ml-auto">
        <li class="nav-item active">
          <a class="nav-link" href="https://techarise.com">Home
                <span class="sr-only">(current)</span>
              </a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="https://techarise.com/php-free-script-demos/">Live Demo</a>
        </li>
      </ul>
    </div>
  </div>
</nav>

<!DOCTYPE html>

<head>

<title>Integrate CCAvenue Payment Gateway using PHP | Tech Arise</title>

</head>

<body>

<a class="navbar-brand font-weight-bold" href="https://techarise.com"><h1>Tech Arise</h1></a>

</button>

<a class="nav-link" href="https://techarise.com">Home

<span class="sr-only">(current)</span>

</a>

</li>

</li>

</ul>

</div>

</nav>

footer.php

<!-- Footer -->
  <footer class="footer bg-light footer-bg-dark">
    <div class="container">
      <div class="row">
        <div class="col-lg-6 h-100 text-center text-lg-left my-auto">
          <ul class="list-inline mb-2">
            <li class="list-inline-item">
              <a href="#">About</a>
            </li>
            <li class="list-inline-item">&sdot;</li>
            <li class="list-inline-item">
              <a href="#">Contact</a>
            </li>
            <li class="list-inline-item">&sdot;</li>
            <li class="list-inline-item">
              <a href="#">Terms of Use</a>
            </li>
            <li class="list-inline-item">&sdot;</li>
            <li class="list-inline-item">
              <a href="#">Privacy Policy</a>
            </li>
          </ul>
          <p class="text-muted small mb-4 mb-lg-0">Copyright &copy;  2011 - <?php print date('Y', time());?> <a href="https://techarise.com/">TECHARISE.COM</a> All rights reserved.</p>
        </div>
        <div class="col-lg-6 h-100 text-center text-lg-right my-auto">
          <ul class="list-inline mb-0">
            <li class="list-inline-item mr-3">
              <a href="#">
                <i class="fab fa-facebook fa-2x fa-fw"></i>
              </a>
            </li>
            <li class="list-inline-item mr-3">
              <a href="#">
                <i class="fab fa-twitter-square fa-2x fa-fw"></i>
              </a>
            </li>
            <li class="list-inline-item">
              <a href="#">
                <i class="fab fa-instagram fa-2x fa-fw"></i>
              </a>
            </li>
          </ul>
        </div>
      </div>
    </div>
  </footer>
  <script>
    var baseurl = "<?php print site_url();?>";
  </script>
  <!-- Bootstrap core JavaScript -->
  <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.3.1/js/bootstrap.bundle.min.js"></script>  
</body>
</html>

<a href="#">About</a>

</li>

<a href="#">Contact</a>

</li>

<a href="#">Terms of Use</a>

</li>

<a href="#">Privacy Policy</a>

</li>

</ul>

</div>

</a>

</li>

</a>

</li>

</a>

</li>

</ul>

</div>

</footer>

var baseurl = "<?php print site_url();?>";

</script>

</body>

</html>

Also Read : Razorpay Payment Gateway Integration in Codeigniter using cURL

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