Codeigniter Paypal Integration Example

Hi Dev,

Today, I will share you integrate paypal gateway payment in codeigniter. In this tutorial, I will learn how to integrate Paypal payment gateway in Codeigniter. I will give you the PayPal payment gateway integration in the Codeigniter fully example.

In this example, I will show you easy and simple way to integrate paypal payment gateway on codeigniter framework. I will learn you step by step to integrate payapal payment gateway in codeigniter as follow bellow ste.

Step 1 : Download Paypal Payment Gateway Library

In this step First of all we need to download paypal payment gateway library for codeigniter.

You can download the PayPal payment gateway library website link is here Paypal Payment Gateway library for Codeigniter.

In this library holds two files that name paypal_lib, paypallib_config, you can put the file according to the below steps:

paypal_lib.php file => will be placed in the application/libraries/ directory

paypallib_config.php file => will be placed in the application/config/ directory.

Step 2 : Create Database Tables

In this step, You will need to create two table like products and payment table. Product table in basic product information and payment table in payment data with basic information like user_id, payment_id, product_id, txt_id or currency code, etc.

products table

CREATE TABLE `products` (
 `id` int(11) NOT NULL AUTO_INCREMENT,
 `name` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
 `image` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
 `price` float(10,2) NOT NULL,
 `status` tinyint(1) NOT NULL DEFAULT '1',
 PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

payments table

CREATE TABLE `payments` (
 `payment_id` int(11) NOT NULL AUTO_INCREMENT,
 `user_id` int(11) NOT NULL,
 `product_id` int(11) NOT NULL,
 `txn_id` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
 `payment_gross` float(10,2) NOT NULL,
 `currency_code` varchar(5) COLLATE utf8_unicode_ci NOT NULL,
 `payer_email` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
 `payment_status` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
 PRIMARY KEY (`payment_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

Step 3 : Create New Controller

In this step, You will create controller, In paypal controller, we need to create five methods, index(), buyProduct(), success(), cancel(), and ipn().

application/controller/paypalController.php

<?php defined('BASEPATH') OR exit('No direct script access allowed');
class Products extends CI_Controller
{
    function  __construct() {
        parent::__construct();
        $this->load->library('paypal_lib');
        $this->load->model('product');
        $this->load->database();
    }
     
    function index(){
        $data = array();
        //get products inforamtion from database table
        $data['products'] = $this->product->getProducts();
        //loav view and pass the products information to view
        $this->load->view('products/index', $data);
    }
     
    function buyProduct($id){
        //Set variables for paypal form
        $returnURL = base_url().'paypal/success'; //payment success url
        $failURL = base_url().'paypal/fail'; //payment fail url
        $notifyURL = base_url().'paypal/ipn'; //ipn url
        //get particular product data
        $product = $this->product->getProducts($id);
        $userID = 1; //current user id
        $logo = base_url().'Your_logo_url';
         
        $this->paypal_lib->add_field('return', $returnURL);
        $this->paypal_lib->add_field('fail_return', $failURL);
        $this->paypal_lib->add_field('notify_url', $notifyURL);
        $this->paypal_lib->add_field('item_name', $product['name']);
        $this->paypal_lib->add_field('custom', $userID);
        $this->paypal_lib->add_field('item_number',  $product['id']);
        $this->paypal_lib->add_field('amount',  $product['price']);        
        $this->paypal_lib->image($logo);
         
        $this->paypal_lib->paypal_auto_form();
    }
 
     function paymentSuccess(){
 
        //get the transaction data
        $paypalInfo = $this->input->get();
           
        $data['item_number'] = $paypalInfo['item_number']; 
        $data['txn_id'] = $paypalInfo["tx"];
        $data['payment_amt'] = $paypalInfo["amt"];
        $data['currency_code'] = $paypalInfo["cc"];
        $data['status'] = $paypalInfo["st"];
         
        //pass the transaction data to view
        $this->load->view('paypal/paymentSuccess', $data);
     }
      
     function paymentFail(){
        //if transaction cancelled
        $this->load->view('paypal/paymentFail');
     }
      
     function ipn(){
        //paypal return transaction details array
        $paypalInfo    = $this->input->post();
 
        $data['user_id'] = $paypalInfo['custom'];
        $data['product_id']    = $paypalInfo["item_number"];
        $data['txn_id']    = $paypalInfo["txn_id"];
        $data['payment_gross'] = $paypalInfo["mc_gross"];
        $data['currency_code'] = $paypalInfo["mc_currency"];
        $data['payer_email'] = $paypalInfo["payer_email"];
        $data['payment_status']    = $paypalInfo["payment_status"];
 
        $paypalURL = $this->paypal_lib->paypal_url;        
        $result    = $this->paypal_lib->curlPost($paypalURL,$paypalInfo);
         
        //check whether the payment is verified
        if(preg_match("/VERIFIED/i",$result)){
            //insert the transaction data into the database
            $this->product->storeTransaction($data);
        }
    }
}

Step 4 : Create Paypal Model

Next, we need to create paypal model. In PayPal model, we need to create two methods, getProducts(), StoreTransaction().

application/models/Paypal.php

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Product extends CI_Model{
    public function __construct()
    {
        $this->load->database();
    }
    //get and return product rows
    public function getProducts($id = ''){
        $this->db->select('id,name,image,price');
        $this->db->from('products');
        if($id){
            $this->db->where('id',$id);
            $query = $this->db->get();
            $result = $query->row_array();
        }else{
            $this->db->order_by('name','asc');
            $query = $this->db->get();
            $result = $query->result_array();
        }
        return !empty($result)?$result:false;
    }
 
    //insert transaction data
    public function storeTransaction($data = array()){
        $insert = $this->db->insert('payments',$data);
        return $insert?true:false;
    }
}

Step 5 : Create View

In this step, You will create two folder named products and paypal. you will create views files where we will show the product listing and payment-related information like payment success or fail details.

application/views/products/index.php

<!DOCTYPE html>
<html>
<head>
  <title>Codeigniter Paypal Integration Example - nicesnippets.com</title>
  <!-- Latest CSS -->
 <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
 <script src="https://code.jquery.com/jquery-3.3.1.min.js"></script> 
</head>
<body>
  <div class="container">
    <h2 class="mt-3 mb-3">Products</h2>
    <div class="row">
        <?php if(!empty($products)): foreach($products as $product): ?>
        <div class="thumbnail">
            <img src="<?php echo base_url().'assets/images/'.$product['image']; ?>" alt="">
            <div class="caption">
                <h4 class="pull-right">$<?php echo $product['price']; ?></h4>
                <h4><a href="javascript:void(0);"><?php echo $product['name']; ?></a></h4>
            </div>
            <a href="<?php echo base_url().'products/buyProduct/'.$product['id']; ?>"><img src="<?php echo base_url(); ?>assets/images/buy-button" style="width: 70px;"></a>
        </div>
        <?php endforeach; endif; ?>
    </div>
  </div>
</body>
</html>

You can go to application/views/paypal folder,

now you will create a new file paymentSuccess.php and put the below code into your file:

application/views/paypal/paymentSuccess.php

<!DOCTYPE html>
<html>
<head>
  <title>Transaction Successfull - Codeigniter Paypal Integration Example - nicesnippets.com</title>
  <!-- Latest CSS -->
 <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
 <script src="https://code.jquery.com/jquery-3.3.1.min.js"></script> 
</head>
<body>
  <div class="container">
    <h2 class="mt-3 mb-3">Transaction Detalis</h2>
    <div class="row">
          <span>Your payment was successful done, thank you for purchase.</span><br/>
          <span>Item Number : 
              <strong><?php echo $item_number; ?></strong>
          </span><br/>
          <span>TXN ID : 
              <strong><?php echo $txn_id; ?></strong>
          </span><br/>
          <span>Amount Paid : 
              <strong>$<?php echo $payment_amt.' '.$currency_code; ?></strong>
          </span><br/>
          <span>Payment Status : 
              <strong><?php echo $status; ?></strong>
        </span><br/>
    </div>
  </div>
</body>
</html>

You can go to application/views/paypal folder,

You willl create a new file paymentFail.php.php and put the below code into your file:

application/views/paypal/paymentFail.php

<!DOCTYPE html>
<html>
<head>
  <title>Transaction Fail - Codeigniter Paypal Integration Example - nicesnippets.com</title>
  <!-- Latest CSS -->
 <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
 <script src="https://code.jquery.com/jquery-3.3.1.min.js"></script> 
</head>
<body>
  <div class="container">
    <h2 class="mt-3 mb-3">Transaction Detalis</h2>
    <div class="row">
       <p>Sorry! Your last transaction was cancelled.</p>
    </div>
  </div>
</body>
</html>

Note:- Paypal Payment Gateway Live

If your test PayPal transaction is worked properly using the PayPal sandbox account. You want to make it live your PayPal payment gateway.

So Open the application/config/paypallib_config.php and change the following two configuration values

1. Change the SANDBOX environment to FALSE for make PayPal payment gateway live.

$config['sandbox'] = FALSE;

2.Change the BUSINESS EMAIL with your live PayPal business email.

$config['business'] = 'business@email.com';

It will help you...