PayPal IPN Help

[clanstyles]

I understand how Paypal's IPN works. After they are done paying you, you redirect them to the finish page and actualy check if they paid ect..

 

// 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 ($res, "VERIFIED") == 0) {
// check the payment_status is Completed
// check that txn_id has not been previously processed
// check that receiver_email is your Primary PayPal email
// check that payment_amount/payment_currency are correct
// process payment
}
else if (strcmp ($res, "INVALID") == 0) {
// log for manual investigation
}
}
fclose ($fp);
}
?>

 

What I doni't get is how to manage Subscritions with IPN. if somebody could please explain how that works and a sniplet. I have searched google and just come up with shit you can buy.

 

Thanks

[clanstyles]

Bring

Up

My

Post

[DeathStar]

https://www.paypal.com/cgi-bin/webscr?cmd=p/xcl/rec/ipn-code-outside

It should be there.

 

And IPN works with your server while transaction is taking place and checks trough paypal for data.

[clanstyles]

Right, I understand how one straight payment of like $5.00 would be. Also that page is where I got what I posted above.

 

But that doesn't say anything about a subscription to check if its still active.