ipn

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

class Paypal_ipn extends CI_Controller {

    public function index() {
        // read the post from PayPal system and add 'cmd'
        $req = 'cmd=_notify-validate';
        $header = null;

        foreach ($_POST as $key => $value) {
            $value = urlencode(stripslashes($value));
            $req .= "&$key=$value";
        }

        // post back to PayPal system to validate
        $header .= "POST /cgi-bin/webscr HTTP/1.0\r\n";
        $header .= "Content-Type: application/x-www-form-urlencoded\r\n";
        $header .= "Content-Length: " . strlen($req) . "\r\n\r\n";
        $fp = fsockopen ('ssl://www.sandbox.paypal.com', 443, $errno, $errstr, 30);

        // assign posted variables to local variables
        //$item_name = $_POST['item_name'];
        //$item_number = $_POST['item_number'];

        if(isset($_POST['payment_status'])) {
            $payment_status = $_POST['payment_status'];
        }
        if(isset($_POST['mc_gross'])) {
            $payment_amount = $_POST['mc_gross'];
        }
        if(isset($_POST['mc_currency'])) {
            $payment_currency = $_POST['mc_currency'];
        }
        if(isset($_POST['txn_id'])) {
            $txn_id = $_POST['txn_id'];
        }
        if(isset($_POST['invoice'])) {
            $invoice = $_POST['invoice'];
        }
        if(isset($_POST['payment_date'])) {
            $payment_date = $_POST['payment_date']; // This is in PST timezone
        }
        if(isset($_POST['payment_type'])) {
            $payment_type = $_POST['payment_type'];
        }
        if(isset($_POST['pending_reason'])) {
            $pending_reason = $_POST['pending_reason'];
        }
        if(isset($_POST['receiver_email'])) {
            $receiver_email = $_POST['receiver_email'];
        }
        if(isset($_POST['payer_email'])) {
            $payer_email = $_POST['payer_email'];
        }
        if(isset($_POST['first_name'])) {
            $first_name = $_POST['first_name'];
        }
        if(isset($_POST['last_name'])) {
            $last_name = $_POST['last_name'];
        }






        //$trackingId = $_POST['trackingId'];

        //$payment_fee = $_POST['mc_fee'];






        //$contact_phone = $_POST['contact_phone'];


        if (!$fp) {
            // HTTP ERROR
        } else {
            fputs ($fp, $header . $req);
            while (!feof($fp)) {
                $res = fgets ($fp, 1024);
                if (strcmp ($res, "VERIFIED") == 0) {
                    log_message('error', "*********************************");
                    $log = var_export($_POST, true);
                    $log = str_replace(array("\r","\n"), '', $log);

                    log_message('error', $log);
                    log_message('error', "*********************************");
                    //log_message('error', "<pre>$_POST</pre>");
                    log_message('error', "invoice = $invoice");
                    //log_message('error', "tracking_id = $trackingId");
                    log_message('error', "payment_status = $payment_status");
                    log_message('error', "payment_amount = $payment_amount");
                    //log_message('error', "payment_fee = $payment_fee");
                    log_message('error', "payment_type = $payment_type");
                    log_message('error', "payment_currency = $payment_currency");
                    log_message('error', "payment_date = $payment_date");
                    log_message('error', "pending_reason = $pending_reason");
                    log_message('error', "first_name = $first_name");
                    log_message('error', "last_name = $last_name");
                    //log_message('error', "contact_phone = $contact_phone");
                    log_message('error', "txn_id = $txn_id");
                    log_message('error', "receiver_email = $receiver_email");
                    log_message('error', "payer_email = $payer_email");

                    // check the payment_status is Completed
                    // check that txn_id has not been previously processed
                    // check that receiver_email is your Primary PayPal email
                    // check that payment_amount/payment_currency are correct
                    // process payment
                }
                else if (strcmp ($res, "INVALID") == 0) {
                    log_message('error', "Problem with IPN. res = $res");
                }
            }
            fclose ($fp);
        }

    }
}