PayPal IPN with CodeIgniter
I am trying to implement a membership subscription service on a website built in CodeIgniter. I wish to use PayPal to manage payments, and am having a very hard time implementing this.
What I am trying to achieve is:
- User fills in a membership form with personal details
- User selects a subscription option (1 of 8 choices - each different price) and submits form
- User is sent to PayPal to pay
- User is returned to site upon successful payment and personal details are stored in database which creates user account (membership).
There is also the addition of form validation, I use the form_validation helper in CodeIgniter, but this needs to be done before PayPal payment can commence.
I have attempted to implement the PayPal_Lib from Ran Aroussi, but I feel it has not enough clear documentation or guidance on it. Any implemented examples or advice would be much appreciated.
Lucas
Answer
Below is the unmodified code that i used with Ran's library. Hope it helps.
<?php
/**
* PayPal_Lib Controller Class (Paypal IPN Class)
*
* Paypal controller that provides functionality to the creation for PayPal forms,
* submissions, success and cancel requests, as well as IPN responses.
*
* The class requires the use of the PayPal_Lib library and config files.
*
* @package CodeIgniter
* @subpackage Libraries
* @category Commerce
* @author Ran Aroussi <[email protected]>
* @copyright Copyright (c) 2006, http://aroussi.com/ci/
*
*/
class Paypal extends Controller
{
function Paypal()
{
parent::Controller();
$this->load->library('Paypal_Lib');
}
function index()
{
$this->form();
}
function form()
{
$this->paypal_lib->add_field('business', '[email protected]');
$this->paypal_lib->add_field('return', site_url('paypal/success') );
$this->paypal_lib->add_field('cancel_return', site_url('paypal/cancel') );
$this->paypal_lib->add_field('notify_url', site_url('paypal/ipn') ); // <-- IPN url
$this->paypal_lib->add_field('custom', '470874552'); // <-- Verify return
$this->paypal_lib->add_field('item_name', 'Paypal Test Transaction');
$this->paypal_lib->add_field('item_number', '5');
$this->paypal_lib->add_field('amount', '9.95');
// if you want an image button use this:
$this->paypal_lib->image('button_03.gif');
// otherwise, don't write anything or (if you want to
// change the default button text), write this:
// $this->paypal_lib->button('Click to Pay!');
$data['paypal_form'] = $this->paypal_lib->paypal_form();
$this->load->view('paypal/form', $data);
}
function cancel()
{
$this->load->view('paypal/cancel');
}
function success()
{
//$data['pp_info'] = $this->input->post();
$data['pp_info'] = $_POST; //FIX?
$this->load->view('paypal/success', $data);
}
function ipn()
{
$ipn_valid = $this->paypal_lib->validate_ipn();
if ( $ipn_valid == TRUE )
{
/**
Log IPN
TODO: bunu daha guzel gozukecek sekilde yapayim ilerde.
**/
date_default_timezone_set('Europe/Istanbul');
$this->load->helper('date');
$raw = '';
foreach ($this->paypal_lib->ipn_data as $key=>$value)
{
$raw .= "\n$key: $value";
}
$this->load->model('model_paypal');
$data_ipn['user_id'] = $this->paypal_lib->ipn_data['custom']; /* get USER_ID from custom field. */
$data_ipn['txn_id'] = $this->paypal_lib->ipn_data['txn_id'];
$data_ipn['payment_status'] = $this->paypal_lib->ipn_data['payment_status'];
$data_ipn['mc_gross'] = $this->paypal_lib->ipn_data['mc_gross'];
$data_ipn['mc_fee'] = $this->paypal_lib->ipn_data['mc_fee'];
$data_ipn['mc_currency'] = $this->paypal_lib->ipn_data['mc_currency'];
$data_ipn['item_number'] = $this->paypal_lib->ipn_data['item_number'];
$data_ipn['datetime'] = mdate( "%Y-%m-%d %H:%i:%s" );
$data_ipn['status'] = IPN_ENTRY_AWAITING;
$data_ipn['raw'] = $raw;
$this->model_paypal->ipn_entry_add ( $data_ipn );
$ipn_payment_status = $this->paypal_lib->ipn_data['payment_status'];
if ( strtolower($ipn_payment_status) == 'pending' )
{
log_message('debug', 'payment status TAMAM');
$this->load->model('model_user_premium');
$ipn_item_number = $this->paypal_lib->ipn_data['item_number'];
$item_info = $this->model_user_premium->Premium_item_info ( $ipn_item_number );
$ipn_mc_gross = $this->paypal_lib->ipn_data['mc_gross'];
log_message('debug', 'Item fee: '. $item_info['item_fee'] );
if ( $item_info['item_fee'] == $ipn_mc_gross )
{
log_message('debug', 'fee ile gross TAMAM');
$data_account['user_id'] = $data_ipn['user_id'];
$data_account['type'] = $item_info['item_type'];
$data_account['date_expire'] = date("Y-m-d", mktime(0, 0, 0, date("m") + $item_info['date_extender'], date("d"), date("y") ) );
log_message('debug', 'UserID: '. $data_account['user_id'] );
log_message('debug', 'Type:'. $data_account['type'] );
log_message('debug', 'Expire:'. $data_account['date_expire'] );
$this->model_user_premium->Premium_membership_change( $data_ipn['user_id'], $data_account );
}
else
{
//TODO: report eksik transaction.
}
}
}
elseif ( $ipn_valid == FALSE )
{
$this->load->library('email');
$this->email->to( '[email protected]' );
$this->email->subject('IPN - FAILED');
$this->email->from( '[email protected]', 'PAYPAL' );
$this->email->message('or 4 life');
$this->email->send();
}
}
function ipn_list()
{
//TODO: admin check
$this->load->helper('form');
$this->load->model('model_theme');
switch ( $_SERVER['REQUEST_METHOD'] )
{
case 'GET':
/* Theme System with Reference Variable ( first param ) */
$this->model_theme->Theme_returnThemeInfo( $data, 'paypal' );
$this->load->view( $data['theme_folder_vault'] . 'master-ipn_list', $data );
break;
case 'POST':
$this->load->model('model_paypal');
$user_id = $this->input->post('user_id');
$txn_id = $this->input->post('txn_id');
$list_ipn = $this->model_paypal->ipn_entry_list ( $user_id, $txn_id );
echo '<pre>';
print_r( $list_ipn );
echo '</pre>';
break;
default:
break;
}
}
function ipn_test()
{
$this->load->model('model_user_premium');
$data_account['user_id'] = 123;
$data_account['type'] = 4;
$data_account['date_expire'] = date("Y-m-d", mktime(0, 0, 0, date("m") + 12, date("d"), date("y") ) );
echo '<pre>';
print_r( $data_account );
echo '</pre>';
$this->model_user_premium->Premium_membership_change( 123, $data_account );
}
}
?>