Paypal IPN Issue with parallel payment - php

Question

I'm using this http://www.binpress.com/app/paypal-adaptive-payments-pro-codeigniter-library/140 library and i'm using this as my ipn listener for a codeigniter project - http://pastebin.com/pMb7Zhz3.
Basically i'm doing a parallel transaction using the paypal library above so that when a user makes a payment/donation, it sends money to 2 different accounts. Once a transaction is complete, paypal sends data to my ipn listener and it parses info for 1 customer just fine if I leave this 'IPNNotificationURL' => '' in my code and go into paypal and set the ipn url.
I'm trying to get IPN information for both accounts, without having to have both accounts set the ipn url in their paypal settings. When I set 'IPNNotificationURL' => 'http://example.com/paypal_ipn', I still get the ipn information for the 1 account, but I get this warning Array to string conversion on line 11 of my listener. How can I fix this and if i do, will I get the ipn information from both accounts?
Here's the pay method from the library above that i'm using for the parallel payments
function Pay()
{
// Prepare request arrays
$PayRequestFields = array(
'ActionType' => 'PAY', // Required. Whether the request pays the receiver or whether the request is set up to create a payment request, but not fulfill the payment until the ExecutePayment is called. Values are: PAY, CREATE, PAY_PRIMARY
'CancelURL' => '', // Required. The URL to which the sender's browser is redirected if the sender cancels the approval for the payment after logging in to paypal.com. 1024 char max.
'CurrencyCode' => 'USD', // Required. 3 character currency code.
'FeesPayer' => 'SENDER', // The payer of the fees. Values are: SENDER, PRIMARYRECEIVER, EACHRECEIVER, SECONDARYONLY
'IPNNotificationURL' => '', // The URL to which you want all IPN messages for this payment to be sent. 1024 char max.
'Memo' => '', // A note associated with the payment (text, not HTML). 1000 char max
'Pin' => '', // The sener's personal id number, which was specified when the sender signed up for the preapproval
'PreapprovalKey' => '', // The key associated with a preapproval for this payment. The preapproval is required if this is a preapproved payment.
'ReturnURL' => '', // Required. The URL to which the sener's browser is redirected after approvaing a payment on paypal.com. 1024 char max.
'ReverseAllParallelPaymentsOnError' => '', // Whether to reverse paralel payments if an error occurs with a payment. Values are: TRUE, FALSE
'SenderEmail' => '', // Sender's email address. 127 char max.
'TrackingID' => '' // Unique ID that you specify to track the payment. 127 char max.
);
$ClientDetailsFields = array(
'CustomerID' => '', // Your ID for the sender 127 char max.
'CustomerType' => '', // Your ID of the type of customer. 127 char max.
'GeoLocation' => '', // Sender's geographic location
'Model' => '', // A sub-identification of the application. 127 char max.
'PartnerName' => '' // Your organization's name or ID
);
$FundingTypes = array('ECHECK', 'BALANCE', 'CREDITCARD');
$Receivers = array();
$Receiver = array(
'Amount' => '', // Required. Amount to be paid to the receiver.
'Email' => '', // Receiver's email address. 127 char max.
'InvoiceID' => '', // The invoice number for the payment. 127 char max.
'PaymentType' => '', // Transaction type. Values are: GOODS, SERVICE, PERSONAL, CASHADVANCE, DIGITALGOODS
'PaymentSubType' => '', // The transaction subtype for the payment.
'Phone' => array('CountryCode' => '', 'PhoneNumber' => '', 'Extension' => ''), // Receiver's phone number. Numbers only.
'Primary' => '' // Whether this receiver is the primary receiver. Values are: TRUE, FALSE
);
array_push($Receivers,$Receiver);
$SenderIdentifierFields = array(
'UseCredentials' => '' // If TRUE, use credentials to identify the sender. Default is false.
);
$AccountIdentifierFields = array(
'Email' => '', // Sender's email address. 127 char max.
'Phone' => array('CountryCode' => '', 'PhoneNumber' => '', 'Extension' => '') // Sender's phone number. Numbers only.
);
$PayPalRequestData = array(
'PayRequestFields' => $PayRequestFields,
'ClientDetailsFields' => $ClientDetailsFields,
'FundingTypes' => $FundingTypes,
'Receivers' => $Receivers,
'SenderIdentifierFields' => $SenderIdentifierFields,
'AccountIdentifierFields' => $AccountIdentifierFields
);
$PayPalResult = $this->paypal_adaptive->Pay($PayPalRequestData);
if(!$this->paypal_adaptive->APICallSuccessful($PayPalResult['Ack']))
{
$errors = array('Errors'=>$PayPalResult['Errors']);
$this->load->view('paypal_error',$errors);
}
else
{
$data['result'] = $PayPalResult;
$this->load->view('success', $data);
}
}
and line 11 is this from the pastebin above - $value = urlencode(stripslashes($value));

Answer 1

I figured out how to parse the adaptive payments IPN in PHP.
I used the DecodePayPalIPN() function by donut2d https://www.x.com/developers/paypal/forums/adaptive-payments-api/php-technique-parsing-adaptive-payment-ipn-posts?page=0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C1 in combination with one of the example listeners that is on the paypal website and here is my complete Codeigniter IPN Listener for adaptive payments with a parallel transaction.
<?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&'.file_get_contents("php://input");
$header = null;
// 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);
$raw_post = file_get_contents("php://input");
$post_array = $this->decodePayPalIPN($raw_post);
//log_message('error', "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
//$log1 = var_export($post_array, true);
//log_message('error', $log1);
//log_message('error', "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
if(isset($post_array['sender_email'])) {
$sender_email = $post_array['sender_email'];
}
if(isset($post_array['status'])) {
$status = $post_array['status'];
}
if(isset($post_array['payment_request_date'])) {
$payment_request_date = $post_array['payment_request_date'];
}
if(isset($post_array['transaction'][0]['receiver'])) {
$receiver0 = $post_array['transaction'][0]['receiver'];
}
if(isset($post_array['transaction'][1]['receiver'])) {
$receiver1 = $post_array['transaction'][1]['receiver'];
}
if(isset($post_array['transaction'][0]['id'])) {
$id0 = $post_array['transaction'][0]['id'];
}
if(isset($post_array['transaction'][1]['id'])) {
$id1 = $post_array['transaction'][1]['id'];
}
if(isset($post_array['transaction'][0]['invoiceId'])) {
$invoiceId0 = $post_array['transaction'][0]['invoiceId'];
}
if(isset($post_array['transaction'][1]['invoiceId'])) {
$invoiceId1 = $post_array['transaction'][1]['invoiceId'];
}
if(isset($post_array['transaction'][0]['amount'])) {
$amount0 = $post_array['transaction'][0]['amount'];
}
if(isset($post_array['transaction'][1]['amount'])) {
$amount1 = $post_array['transaction'][1]['amount'];
}
if(isset($post_array['transaction'][0]['status'])) {
$status0 = $post_array['transaction'][0]['status'];
}
if(isset($post_array['transaction'][1]['status'])) {
$status1 = $post_array['transaction'][1]['status'];
}
if(isset($post_array['transaction'][0]['id_for_sender_txn'])) {
$id_for_sender_txn0 = $post_array['transaction'][0]['id_for_sender_txn'];
}
if(isset($post_array['transaction'][1]['id_for_sender_txn'])) {
$id_for_sender_txn1 = $post_array['transaction'][1]['id_for_sender_txn'];
}
if(isset($post_array['transaction'][0]['status_for_sender_txn'])) {
$status_for_sender_txn0 = $post_array['transaction'][0]['status_for_sender_txn'];
}
if(isset($post_array['transaction'][1]['status_for_sender_txn'])) {
$status_for_sender_txn1 = $post_array['transaction'][1]['status_for_sender_txn'];
}
if(isset($post_array['transaction'][1]['pending_reason'])) {
$pending_reason0 = $post_array['transaction'][1]['pending_reason'];
}
if(isset($post_array['transaction'][1]['pending_reason'])) {
$pending_reason1 = $post_array['transaction'][1]['pending_reason'];
}
if (!$fp) {
// HTTP ERROR
} else {
$counter = 0;
fputs ($fp, $header . $req);
while (!feof($fp)) {
$res = fgets ($fp, 1024);
if (strcmp ($res, "VERIFIED") == 0) {
log_message('error', "sender_email = $sender_email");
log_message('error', "payment_request_date = $payment_request_date");
log_message('error', "status = $status");
log_message('error', "receiver0 = $receiver0");
log_message('error', "receiver1 = $receiver1");
log_message('error', "id0 = $id0");
log_message('error', "id1 = $id1");
log_message('error', "invoiceId0 = $invoiceId0");
log_message('error', "invoiceId1 = $invoiceId1");
log_message('error', "amount0 = $amount0");
log_message('error', "amount1 = $amount1");
log_message('error', "status0 = $status0");
log_message('error', "status1 = $status1");
log_message('error', "id_for_sender_txn0 = $id_for_sender_txn0");
log_message('error', "id_for_sender_txn1 = $id_for_sender_txn1");
log_message('error', "status_for_sender_txn0 = $status_for_sender_txn0");
log_message('error', "status_for_sender_txn1 = $status_for_sender_txn1");
log_message('error', "pending_reason0 = $pending_reason0");
log_message('error', "pending_reason1 = $pending_reason1");
// 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
$counter++;
}
else if (strcmp ($res, "INVALID") == 0) {
log_message('error', 'WE INVALIDDDDDDDDDDDDDDDDDD');
$test = var_export($res, true);
$test = str_replace(array("\r","\n"), '', $test);
log_message('error', $test);
log_message('error', "Problem with IPN. res = $test");
}
}
fclose ($fp);
}
}
function decodePayPalIPN($raw_post)
{
//log_message('error', "testing");
if (empty($raw_post)) {
return array();
} # else:
$post = array();
$pairs = explode('&', $raw_post);
foreach ($pairs as $pair) {
list($key, $value) = explode('=', $pair, 2);
$key = urldecode($key);
$value = urldecode($value);
# This is look for a key as simple as 'return_url' or as complex as 'somekey[x].property'
preg_match('/(\w+)(?:\[(\d+)\])?(?:\.(\w+))?/', $key, $key_parts);
switch (count($key_parts)) {
case 4:
# Original key format: somekey[x].property
# Converting to $post[somekey][x][property]
if (!isset($post[$key_parts[1]])) {
$post[$key_parts[1]] = array($key_parts[2] => array($key_parts[3] => $value));
} else if (!isset($post[$key_parts[1]][$key_parts[2]])) {
$post[$key_parts[1]][$key_parts[2]] = array($key_parts[3] => $value);
} else {
$post[$key_parts[1]][$key_parts[2]][$key_parts[3]] = $value;
}
break;
case 3:
# Original key format: somekey[x]
# Converting to $post[somkey][x]
if (!isset($post[$key_parts[1]])) {
$post[$key_parts[1]] = array();
}
$post[$key_parts[1]][$key_parts[2]] = $value;
break;
default:
# No special format
$post[$key] = $value;
break;
}#switch
}#foreach
return $post;
}#decodePayPalIPN()
}