PayPal IPN with CodeIgniter
I found Ran's library a little hard to use too so I've written a replacement - which also has the benefit of performing more checks on the transaction, and logging the IPN call and the order details in your database. Here's the library on GitHub, I hope you find it useful:
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 <ran@aroussi.com> * @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', 'herrka_1245670546_biz@pandorascode.com'); $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( 'demo@demo.com' ); $this->email->subject('IPN - FAILED'); $this->email->from( 'notify@bulusturx.com', '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 ); }}?>
Here's a paypal library from Jamie Rumbelow that I've been using with minor tweaks: