Razorpay Payment Gateway Integration using CodeIgniter 3

In this tutorial, we will learn how to integrate the RazorPay payment gateway in CodeIgniter. RazorPay is a well-known payment gateway platform in India. Razorpay provides clean, secure, and fast payments services with hassle-free integration with developer-friendly APIs. It supports various payment modes such as Cards, Net-banking, Wallets & UPI.

RazorPay integration using CodeIgniter 3

How to setup RazorPay Account?

Create Razorpay Account

Update Razorpay Config Details

Here, we are using 3 files for generating PDF file:

Controller: Checkout.php - application\controllers\Checkout.php
View: checkout.php - application\views\razorpay\checkout.php
Config: autoload.php - application\config\autoload.php

autoload.php

$autoload[‘libraries’] = array(‘session’, ‘table’, ‘upload’);

$autoload[‘helper’] = array(‘url’, ‘form’, ‘html’, ‘date’);

Checkout.php

Create Checkout.php file in Controller.

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Razorpay extends CI_Controller {

	public function index() {
		$this->checkout();
	}

	public function checkout() {
        $data['title']              = 'Checkout payment | Infovistar';  
        $data['callback_url']       = base_url().'razorpay/callback';
        $data['surl']               = base_url().'razorpay/success';;
        $data['furl']               = base_url().'razorpay/failed';;
        $data['currency_code']      = 'INR';
        $this->load->view('razorpay/checkout', $data);
    }

    // initialized cURL Request
    private function curl_handler($payment_id, $amount)  {
        $url            = 'https://api.razorpay.com/v1/payments/'.$payment_id.'/capture';
        $key_id         = "YOUR KEY ID";
        $key_secret     = "YOUR KEY SECRET";
        $fields_string  = "amount=$amount";
        //cURL Request
        $ch = curl_init();
        //set the url, number of POST vars, POST data
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_USERPWD, $key_id.':'.$key_secret);
        curl_setopt($ch, CURLOPT_TIMEOUT, 60);
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $fields_string);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
        return $ch;
    }   
        
    // callback method
    public function callback() {   
        print_r($this->input->post());     
        if (!empty($this->input->post('razorpay_payment_id')) && !empty($this->input->post('merchant_order_id'))) {
            $razorpay_payment_id = $this->input->post('razorpay_payment_id');
            $merchant_order_id = $this->input->post('merchant_order_id');
            
            $this->session->set_flashdata('razorpay_payment_id', $this->input->post('razorpay_payment_id'));
            $this->session->set_flashdata('merchant_order_id', $this->input->post('merchant_order_id'));
            $currency_code = 'INR';
            $amount = $this->input->post('merchant_total');
            $success = false;
            $error = '';
            try {                
                $ch = $this->curl_handler($razorpay_payment_id, $amount);
                //execute post
                $result = curl_exec($ch);
                $http_status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
                if ($result === false) {
                    $success = false;
                    $error = 'Curl error: '.curl_error($ch);
                } else {
                    $response_array = json_decode($result, true);
                        //Check success response
                        if ($http_status === 200 and isset($response_array['error']) === false) {
                            $success = true;
                        } else {
                            $success = false;
                            if (!empty($response_array['error']['code'])) {
                                $error = $response_array['error']['code'].':'.$response_array['error']['description'];
                            } else {
                                $error = 'RAZORPAY_ERROR:Invalid Response <br/>'.$result;
                            }
                        }
                }
                //close curl connection
                curl_close($ch);
            } catch (Exception $e) {
                $success = false;
                $error = 'Request to Razorpay Failed';
            }
            
            if ($success === true) {
                if(!empty($this->session->userdata('ci_subscription_keys'))) {
                    $this->session->unset_userdata('ci_subscription_keys');
                }
                if (!$order_info['order_status_id']) {
                    redirect($this->input->post('merchant_surl_id'));
                } else {
                    redirect($this->input->post('merchant_surl_id'));
                }

            } else {
                redirect($this->input->post('merchant_furl_id'));
            }
        } else {
            echo 'An error occured. Contact site administrator, please!';
        }
    } 
    public function success() {
        $data['title'] = 'Razorpay Success | Infovistar.in';
        echo "<h4>Your transaction is successful</h4>";  
        echo "<br/>";
        echo "Transaction ID: ".$this->session->flashdata('razorpay_payment_id');
        echo "<br/>";
        echo "Order ID: ".$this->session->flashdata('merchant_order_id');
    }  
    public function failed() {
        $data['title'] = 'Razorpay Failed | Infovistar.in';  
        echo "<h4>Your transaction got Failed</h4>";            
        echo "<br/>";
        echo "Transaction ID: ".$this->session->flashdata('razorpay_payment_id');
        echo "<br/>";
        echo "Order ID: ".$this->session->flashdata('merchant_order_id');
    }

}

checkout.php

Create a checkout.php file in the views/razorpay folder.

<!DOCTYPE html>
<html>
<head>
<title>Razorpay Payment Gateway</title>
</head>
<body>

<?php
$description        = "Product Description";
$txnid              = date("YmdHis");     
$key_id             = "YOUR KEY ID";
$currency_code      = $currency_code;            
$total              = (1* 100); // 100 = 1 indian rupees
$amount             = 1;
$merchant_order_id  = "ABC-".date("YmdHis");
$card_holder_name   = 'Junaid Shaikh';
$email              = 'coexistech@gmail.com';
$phone              = '9000000001';
$name               = "RazorPay Infovistar";
?>

    <form name="razorpay-form" id="razorpay-form" action="<?php echo $callback_url; ?>" method="POST">
        <input type="hidden" name="razorpay_payment_id" id="razorpay_payment_id" />
        <input type="hidden" name="merchant_order_id" id="merchant_order_id" value="<?php echo $merchant_order_id; ?>"/>
        <input type="hidden" name="merchant_trans_id" id="merchant_trans_id" value="<?php echo $txnid; ?>"/>
        <input type="hidden" name="merchant_product_info_id" id="merchant_product_info_id" value="<?php echo $description; ?>"/>
        <input type="hidden" name="merchant_surl_id" id="merchant_surl_id" value="<?php echo $surl; ?>"/>
        <input type="hidden" name="merchant_furl_id" id="merchant_furl_id" value="<?php echo $furl; ?>"/>
        <input type="hidden" name="card_holder_name_id" id="card_holder_name_id" value="<?php echo $card_holder_name; ?>"/>
        <input type="hidden" name="merchant_total" id="merchant_total" value="<?php echo $total; ?>"/>
        <input type="hidden" name="merchant_amount" id="merchant_amount" value="<?php echo $amount; ?>"/>
    </form>

    <table>
        <tr>
            <th>No.</th>
            <th>Product Name</th>
            <th>Cost</th>
        </tr>
        <tr>
            <td>1</td>
            <td>HeadPhones</td>
            <td>1 Rs</td>
        </tr>
    </table>
    <input  id="pay-btn" type="submit" onclick="razorpaySubmit(this);" value="Pay Now" class="btn btn-primary" />

    <script src="https://checkout.razorpay.com/v1/checkout.js"></script>
    <script>
        var options = {
            key:            "<?php echo $key_id; ?>",
            amount:         "<?php echo $total; ?>",
            name:           "<?php echo $name; ?>",
            description:    "Order # <?php echo $merchant_order_id; ?>",
            netbanking:     true,
            currency:       "<?php echo $currency_code; ?>", // INR
            prefill: {
                name:       "<?php echo $card_holder_name; ?>",
                email:      "<?php echo $email; ?>",
                contact:    "<?php echo $phone; ?>"
            },
            notes: {
                soolegal_order_id: "<?php echo $merchant_order_id; ?>",
            },
            handler: function (transaction) {
                document.getElementById('razorpay_payment_id').value = transaction.razorpay_payment_id;
                document.getElementById('razorpay-form').submit();
            },
            "modal": {
                "ondismiss": function(){
                    location.reload()
                }
            }
        };

        var razorpay_pay_btn, instance;
        function razorpaySubmit(el) {
            if(typeof Razorpay == 'undefined') {
                setTimeout(razorpaySubmit, 200);
                if(!razorpay_pay_btn && el) {
                    razorpay_pay_btn    = el;
                    el.disabled         = true;
                    el.value            = 'Please wait...';  
                }
            } else {
                if(!instance) {
                    instance = new Razorpay(options);
                    if(razorpay_pay_btn) {
                    razorpay_pay_btn.disabled   = false;
                    razorpay_pay_btn.value      = "Pay Now";
                    }
                }
                instance.open();
            }
        }  
    </script>

</body>
</html>

RazorPay is integrated successfully.

Originally published on infovistar.in