paypal IPN php script - php

Question

I just realized that my paypal ipn handler in php doesn't work anymore (and I change nothing), I use the sample php script provided by paypal.
I tried to isolate the problem by making several test, and at this time I can say that the problem is not the "VERIFIED" or the "INVALID" thing but comes from these lines:
[...]
fputs ($fp, $header . $req);
while (!feof($fp))
{
$res = fgets ($fp, 1024);
if (strcmp ($res, "VERIFIED") == 0)
{
// check the payment_status is Completed
[...]
Anyone know if paypal change something or why it doesn't work?
thanks'
ps: if I put my code before all the paypal tests (before the line "if (!$fp)") it just works fine
This is my code, I comment where the "database process" works and where it doesn't.
<?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.sandbox.paypal.com', 443, $errno, $errstr, 30);
// assign posted variables to local variables
$payment_status = $_POST['payment_status'];
// DATABASE PROCESS WORKS (BEFORE THE PAYPAL TESTS)
if (!$fp)
{
// HTTP ERROR
}
else
{
// DATABASE PROCESS WORKS
fputs ($fp, $header . $req);
while (!feof($fp))
{
$res = fgets ($fp, 1024);
if (strcmp ($res, "VERIFIED") == 0)
{
// check the payment_status is Completed
// check that txn_id has not been previously processed
// check that receiver_email is your Primary PayPal email
// check that payment_amount/payment_currency are correct
// process payment
// DATABASE PROCESS NOT WORKING
}
else if (strcmp ($res, "INVALID") == 0)
{
// log for manual investigation
// DATABASE PROCESS NOT WORKING
}
}
fclose ($fp);
}
?>

Answer 1

try using the updated script on x.xom
https://www.x.com/instant-payment-notification-4
it uses CURL instead of fsock

Answer 2

This error occurred when server not configured properly for socket or openSSL module not configured.
OR
You can try with below code sample of using file_get_contents instead of $fp code
<?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";
}
// for live mode
$url="https://www.paypal.com/cgi-bin/webscr";
// for developement mode
$url="https://www.sandbox.paypal.com/cgi-bin/webscr";
// instead of use of fopen you can use
$res=file_get_contents($url"?".$req);
// compare response
if (strcmp (trim($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 (trim($res), "INVALID") == 0) {
// log for manual investigation
}
?>
if file_get_contents not working then you can use CURL for getting response...
Let me know if have any question?
Thanks