PHP - Paypal Ipn Problem

Hi

Does any one know of any good tutorials for paypal web payments pro, or recommend books

Thanks in advance

I am trying to get a Paypal IPN working using PHP. I have attached the code I have written that is not working. I have no real way to test it other than nothing is being posted to the databases. The transactions seem to complete with paypal, but I get no information and no emails are generated.

Any help would be much appreciated.

Hi all

I have a quick PayPal IPN question, is this the right group to post the message and does anyone know much about the PayPal IPN?

Thanks

Hey Guys,

i have another problem, i am using paypal IPN, and i want the details of the order to be stored in my orders table of the databse as well as sending me an email. Im pretty sure the code is ok, but it is not working. Can some one please take a look?

<?php

 include('db_fns.php');
 
 
 // change these to your paypal settings
 $paypal_email = "benmunns@gmail.com";
 $paypal_currency = 'USD';
 $shipping = 10.00;
 
 
 /**
  * checks if paypal trans id is already in database
  * @param int $trans_id
  * @return bool
  */
 function no_paypal_trans_id($trans_id)
 {
    $connection = db_connect();
    $query = sprintf("SELECT id from orders WHERE paypal_trans_id = '%s'",
                      mysql_real_escape_string($trans_id));
    $result = mysql_query($query);
   
    $num_results = mysql_num_rows($result);
   
    if($num_results == 0)
    {
       return true;
    }
   
    return false;
   
 }
 
 /**
  * checks to make sure that paypal payment amount is correct
  * @param int $shipping
   * @param array $params
  * @return bool
  */
 function payment_amount_correct($shipping, $params)
 {
     $amount = 0.00;
      
      for ($i=1;  $i <= $params['num_cart_items']; $i++)
      {
        $query = sprintf("SELECT price from products where id='%s'",
         mysql_real_escape_string($params["item_number{$i}"]));
         $result = mysql_query($query);
         if($result)
         {
              $item_price = mysql_result($result, 0, 'price');
           $amount += $item_price * $params["quantity{$i}"];
         }
      }
      
      if(($amount+$shipping) == $params['mc_gross'])
      {
        return true;   
      }
      else
      {
        return false;   
      }
   
 }
 
 
    
/**
 * creates order and adds items
 * @param array $params
 * @return bool
 */
   function create_order($params)
   {
      db_connect();
      
       $query =  sprintf("INSERT INTO orders set
                             orders.firstname = '%s',
                                      orders.lastname = '%s',
                                      orders.email = '%s',
                                      orders.country = '%s',
                          orders.address = '%s',
                          orders.city = '%s',
                                     orders.zip_code = '%s',
                                     orders.state = '%s',
                                     orders.status = '%s',
                                     orders.amount = '%s',
                                     orders.paypal_trans_id = '%s',
                                      created_at = NOW()
                           ",
                              mysql_real_escape_string($params['first_name']),
                               mysql_real_escape_string($params['last_name']),
                               mysql_real_escape_string($params['payer_email']),
                              mysql_real_escape_string($params['address_country']),
                               mysql_real_escape_string($params['address_street']),
                               mysql_real_escape_string($params['address_city']),
                               mysql_real_escape_string($params['address_zip']),
                               mysql_real_escape_string($params['address_state']),
                               mysql_real_escape_string($params['payment_status']),
                               mysql_real_escape_string($params['mc_gross']),
                               mysql_real_escape_string($params['txn_id'])
               
                           );

      $result = mysql_query($query);
      if(!$result)
      {
          return false;
      }
      
      $order_id = mysql_insert_id();
      
      for ($i=1;  $i <= $params['num_cart_items'] ; $i++)
      {
           $product = find_product($params["item_number{$i}"]);
            
           $query = sprintf("INSERT
                                    INTO items
                                         set
                                                      order_id = '%s',
                                                      product_id = '%s',
                                                      title = '%s',
                                                      price = '%s',
                                                      qty = '%s'
                                                      ",
                                                       mysql_real_escape_string($order_id),
                                                       mysql_real_escape_string($product['id']),
                                                       mysql_real_escape_string($product['title']),
                                                      mysql_real_escape_string($product['price']),
                                                       mysql_real_escape_string($params["quantity{$i}"])   
                                                   
                                                       );
            
             $result = mysql_query($query);
            
             if(!$result)
             {
                return false;
             }
            
          }
 

       return true;
   }   




// read the post from PayPal system and add 'cmd'
$req = 'cmd=_notify-validate';

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 ('www.paypal.com', 80, $errno, $errstr, 30);

// assign posted variables to local variables
$item_name = $_POST['item_name'];
$item_number = $_POST['item_number'];
$payment_status = $_POST['payment_status'];
$payment_amount = $_POST['mc_gross'];
$payment_currency = $_POST['mc_currency'];
$txn_id = $_POST['txn_id'];
$receiver_email = $_POST['receiver_email'];
$payer_email = $_POST['payer_email'];

if (!$fp) {
// HTTP ERROR
} else {
fputs ($fp, $header . $req);
while (!feof($fp)) {
$res = fgets ($fp, 1024);
if (strcmp ($res, "VERIFIED") == 0) {
 
   if ($_POST['payment_status'] == 'Completed'
        && no_paypal_trans_id($_POST['txn_id'])
         && $paypal_email == $_POST['receiver_email']
         && $paypal_currency == $_POST['mc_currency']
         && payment_amount_correct($shipping, $_POST)
         )
   {
     // process payment
       create_order($_POST);
    
   }

}
else if (strcmp ($res, "INVALID") == 0) {
// log for manual investigation
}
}
fclose ($fp);
}
?>

Hey All, 

I have setup a Paypal API to handle the recurring payments on my website, once the payment is completed I get a token id and ba_token id return. 

I am storing this in a database, but wondered how people link this with a user table? I could use a cookie to store the user's id before payment and then get it once the payment is complete, but this would not work with the subsequent recurring payments. 

How do you go about sending the user id when a recurring payment happens?

Any advise would be appreciated.

Edd

Hey guys i have created a paypal IPN script and it takes various info from users via paypal. Anyways i store their info into a database along with their email however i dont want them to be able to purchase again with the same email (long story) anways by the time i receive the info from paypal the payments already gone through so its too late for me to do the checking against the database. Is there anyway i can auto refund the payment do paypal allow this? Hope someone can help.

Thanks!

Hi guys, my code below works with sanbox for paypal IPN but since it has gone live it doesnt do anything, so i made emails to send me where the issue is and it keep sending me $req = 'cmd=_notify-validate';

could you please tell me what im doing wrong here? my db connection should be fine as it does update the users on sanbox.

the account im paying with in paypal keep saying payment status unclaimed. it means the reciever has not recieved the money. I checked the paypal account where i recieve the moeny and looked into my ipn history, nothing there.

the same ipn address is used for my account when i tested it on sanbox,

 thanks


<?php
$email="princeofpersia@hotmail.co.uk";

include 'global.php';

// read the post from PayPal system and add 'cmd'

$req = 'cmd=_notify-validate';

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.paypal.com', 443, $errno, $errstr, 30);
//$fp = fsockopen ('ssl://www.paypal.com', 443, $errno, $errstr, 30);//Live
// assign posted variables to local variables

if (!$fp)// failed to connect to url
{
 //write to file
 $fh = fopen("logipn.txt", 'a');//open file and create if does not exist
 fwrite($fh, "\r\n/////////////////////////////////////////\r\n HTTP ERROR \r\n");//Just for spacing in log file
 fwrite($fh, $errstr);//write data
 fclose($fh);//close file
 
 //email
 $mail_From = "From: IPN@tester.com";
 $mail_To = $email;
 $mail_Subject = "HTTP ERROR";
 $mail_Body = $errstr;//error string from fsockopen
 mail($mail_To, $mail_Subject, $mail_Body, $mail_From);
} 
else//successful connect to url
{
 fputs ($fp, $header . $req);//send request
 while (!feof($fp)) //while not end of file
 {
  $res = fgets ($fp, 1024);//get response
  if (strcmp ($res, "VERIFIED") == 0) 
  {
   //write to file
   $fh = fopen("logipn.txt", 'a');//open file and create if does not exist
   fwrite($fh, "\r\n/////////////////////////////////////////\r\n Verified \r\n");//Just for spacing in log file
   fwrite($fh, $req);//write data
   fclose($fh);//close file
 
   //email
   $mail_From = "From: IPN@tester.com";
   $mail_To = $email;
   $mail_Subject = "VERIFIED IPN";
   $mail_Body = $req;
   mail($mail_To, $mail_Subject, $mail_Body, $mail_From);
  }
    else if (strcmp ($res, "INVALID") == 0) 
  {
   //write to file
   $fh = fopen("logipn.txt", 'a');//open file and create if does not exist
   fwrite($fh, "\r\n/////////////////////////////////////////\r\n Invalid \r\n");//Just for spacing in log file
   fwrite($fh, $req);//write data
   fclose($fh);//close file
 
   //email
   $mail_From = "From: IPN@tester.com";
   $mail_To = $email;
   $mail_Subject = "INVALID IPN";
   $mail_Body = $req;
   mail($mail_To, $mail_Subject, $mail_Body, $mail_From);
  }
 }
 fclose ($fp);//close file pointer
}

$item_name = $_POST['item_name'];
$item_number = $_POST['item_number'];
$payment_status = $_POST['payment_status'];
$payment_amount = $_POST['mc_gross'];
$payment_currency = $_POST['mc_currency'];
$txn_id = $_POST['txn_id'];
$receiver_email = $_POST['receiver_email'];
$payer_email = $_POST['payer_email'];
//$username=$_POST['username'];
if (!$fp) {
// HTTP ERROR
} else {
fputs ($fp, $header . $req);
while (!feof($fp)) {
$res = fgets ($fp, 1024);
if (strcmp ($res, "VERIFIED") == 0) {

if (strtolower($payment_status)=="completed")

{

if ($payment_amount==0.01&&$payment_currency=="GBP") 
{

$update = mysql_query("UPDATE users SET credit= credit+5  WHERE email='$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 ($res, "INVALID") == 0) {
// log for manual investigation
}
}
fclose ($fp);
}
?>

Hi, I am new here, so hello everyone.

I really need some help with getting Paypal IPN working correctly.

This is what I am trying to do.  I have a user database, when the user logs in, they have the option to upgrade/subscribe to our website.

So when they subscribe and payment is validated, I want a specific field in a specific table updated based on the user's unique ID, not based on [payer_email], so how do I pass on that parameter using IPN?

right now I added the "userId" to a hidden field in the Paypal subscription form named "on1"....

I hope this isn't confusing - would really appreciate your help -  I added code below.
Code: [Select]
<?php

DB info --


// read the post from PayPal system and add 'cmd'
$req = 'cmd=_notify-validate';
foreach ($_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);


if (!$fp) {
// HTTP ERROR
} else {
fputs ($fp, $header . $req);
while (!feof($fp)) {
$res = fgets ($fp, 1024);
if (strcmp ($res, "VERIFIED") == 0) {

// PAYMENT VALIDATED & VERIFIED!

$email = $_POST['payer_email'];
$userId=$_POST['on1'];
$membership = '2';

mysql_query("UPDATE users SET membership=".$membership." WHERE userId=".$userId) or die(mysql_error()); 

$to      = $email;
$subject = 'subject line';
$message = '
message here
';

mail($to, $subject, $message, $headers);



}

else if (strcmp ($res, "INVALID") == 0) {

// PAYMENT INVALID & INVESTIGATE MANUALY!

$to      = 'my_email';
$subject = 'subject lin';
$message = '

Dear Administrator,

A payment has been made but is flagged as INVALID.
Please verify the payment manualy and contact the buyer.

Buyer Email: '.$email.'
';
$headers = 'From:my_email' . "\r\n";

mail($to, $subject, $message, $headers);

}
}
fclose ($fp);
}
?>

I am writing a listener to handle IPN notifications from paypal, and one thing I cant seemt o find anywhere -

How does IPN handle pending payments, that are then completed/denied? For example, if paypal invokes my IPN once the payment is made, but pending, with a particular transaction ID, when the payment completes, does it then invoke my IPN again, with the payment status as 'completed'? If so, will this second IPN have the same transaction ID?

It would seem logical that the same transaction ID is sent again, as it is actually the same customer transaction, however reading this on thepaypal website suggests otherwise:

"Avoid duplicate IPN messages. Check that you have not already processed the transaction identified by the transaction ID returned in the IPN message. You may need to store transaction IDs returned by IPN messages in a file or database so that you can check for duplicates. If the transaction ID sent by PayPal is a duplicate, you should not process it again. "

Help would be appreciated!!

For some reason I can't get this script working for my IPN.  Please help.


<?php

include("init.inc.php");

$send = 'cmd=_notify-validate&' . http_build_query($_POST);
 
$head  = 'POST /cgi-bin/webscr HTTP/1.0' . "\r\n";
$head .= 'Content-Type: application/x-www-form-urlencoded' . "\r\n";
$head .= 'Content-Length: ' . strlen($send) . "\r\n\r\n";

$fp = fsockopen('sandbox.paypal.com', 80);

if ($fp !== false){
fwrite($fp, $head . $send);
$response = stream_get_contents($fp);
$response = trim(end(explode("\n", $response)));

if ($response === 'VERIFIED' && $_POST['payment_status'] === "Completed" && $_POST['mc_gross'] === "10.00" && $_POST['mc_currency'] === "USD")
{
$payer_email = $_POST['payer_email'];
$q = mysql_query("UPDATE `users` SET `test` = '1' WHERE `email` = '$payer_email'");
}
}
 
fclose($fp);

?>

I am trying to write a Paypal IPN Listener that will create a confirmation key in the order database I have on the server. Upon completing the order it will then send a email to the buyer with a link to a file upload page with the confirmation code embedding so that when the buyer goes to the upload page it can authenicate based on that code prior to allowing the person to upload a file. I has been a pain and is still not working. Similar to an email confirmation when some one signs up as a user on a site, but using the Paypal order information and the listener to generate the confirmation and authentication. IS THIS POSSIBLE?

Hi Everybody

I am doing online education portal. Teachers and students will be registered on this site. Student will search teachers and create schedule to learn subjects. For that student can pay to the teacher some amount. So that student can increase his/her balance. That means he can transfer some money to website company account through credit card or paypal or google checkout.

I did credit card part. But i am not getting any idea to do in paypal. That means student can enter amount and click paypal button, it should show paypal page. So that he can login into his paypal account and pay that amount. After pay that amount we can get IPN (Instant Payment Notification). So that we can store that amount into my database under that student ID.

Please tell me how can i do this?

hi,
I'm trying to integrate paypal integration. it is integrated successfully and I've checked on my test account too. i want that as user purchase package he should able to download the file. to do that i want to set return variable. as user complete the payment process on paypal , it should auto come back to my website. as he'll be back I'll set his flag to paid and allow him to download file. the problem I'm facing is on my test account. when i paid money. i didn't return to my website. so i don't know to set his flag to true.
any one know its best solution??? i want immediate response to client to pay online.

Please advise...
Thanks

Hi
me need to implement echeck system in my site with paypal using php script with ipn can any one help me out regarding code for paypal echeck payment system.
Thanks