Paypal Missing POST Data - php

Question

I'm using the regular files from Paypal
THIS IS ZZZ.php
<?php namespace Listener;
require('PaypalIPN.php');
use PaypalIPN;
$ipn = new PaypalIPN();
// Use the sandbox endpoint during testing.
$ipn->useSandbox();
$verified = $ipn->verifyIPN();
if ($verified) {
$response = "verified";
file_put_contents("test.txt", $response);
/*
* Process IPN
* A list of variables is available here:
* https://developer.paypal.com/webapps/developer/docs/classic/ipn/integration-guide/IPNandPDTVariables/
*/
}
header("HTTP/1.1 200 OK");
THIS IS PAYPALIPN.php (regular one from them)
class PaypalIPN
{
/**
* #var bool $use_sandbox Indicates if the sandbox endpoint is used.
*/
private $use_sandbox = false;
/**
* #var bool $use_local_certs Indicates if the local certificates are used.
*/
private $use_local_certs = true;
/** Production Postback URL */
const VERIFY_URI = 'https://ipnpb.paypal.com/cgi-bin/webscr';
/** Sandbox Postback URL */
const SANDBOX_VERIFY_URI = 'https://ipnpb.sandbox.paypal.com/cgi-bin/webscr';
/** Response from PayPal indicating validation was successful */
const VALID = 'VERIFIED';
/** Response from PayPal indicating validation failed */
const INVALID = 'INVALID';
/**
* Sets the IPN verification to sandbox mode (for use when testing,
* should not be enabled in production).
* #return void
*/
public function useSandbox()
{
$this->use_sandbox = true;
}
/**
* Sets curl to use php curl's built in certs (may be required in some
* environments).
* #return void
*/
public function usePHPCerts()
{
$this->use_local_certs = false;
}
/**
* Determine endpoint to post the verification data to.
* #return string
*/
public function getPaypalUri()
{
if ($this->use_sandbox) {
return self::SANDBOX_VERIFY_URI;
} else {
return self::VERIFY_URI;
}
}
/**
* Verification Function
* Sends the incoming post data back to PayPal using the cURL library.
*
* #return bool
* #throws Exception
*/
public function verifyIPN()
{
if ( ! count($_POST)) {
throw new Exception("Missing POST Data");
}
$raw_post_data = file_get_contents('php://input');
$raw_post_array = explode('&', $raw_post_data);
$myPost = array();
foreach ($raw_post_array as $keyval) {
$keyval = explode('=', $keyval);
if (count($keyval) == 2) {
// Since we do not want the plus in the datetime string to be encoded to a space, we manually encode it.
if ($keyval[0] === 'payment_date') {
if (substr_count($keyval[1], '+') === 1) {
$keyval[1] = str_replace('+', '%2B', $keyval[1]);
}
}
$myPost[$keyval[0]] = urldecode($keyval[1]);
}
}
// Build the body of the verification post request, adding the _notify-validate command.
$req = 'cmd=_notify-validate';
$get_magic_quotes_exists = false;
if (function_exists('get_magic_quotes_gpc')) {
$get_magic_quotes_exists = true;
}
foreach ($myPost as $key => $value) {
if ($get_magic_quotes_exists == true && get_magic_quotes_gpc() == 1) {
$value = urlencode(stripslashes($value));
} else {
$value = urlencode($value);
}
$req .= "&$key=$value";
}
// Post the data back to PayPal, using curl. Throw exceptions if errors occur.
$ch = curl_init($this->getPaypalUri());
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $req);
curl_setopt($ch, CURLOPT_SSLVERSION, 6);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
// This is often required if the server is missing a global cert bundle, or is using an outdated one.
if ($this->use_local_certs) {
curl_setopt($ch, CURLOPT_CAINFO, __DIR__ . "/cert/cacert.pem");
}
curl_setopt($ch, CURLOPT_FORBID_REUSE, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Connection: Close'));
$res = curl_exec($ch);
if ( ! ($res)) {
$errno = curl_errno($ch);
$errstr = curl_error($ch);
curl_close($ch);
throw new Exception("cURL error: [$errno] $errstr");
}
$info = curl_getinfo($ch);
$http_code = $info['http_code'];
if ($http_code != 200) {
throw new Exception("PayPal responded with http code $http_code");
}
curl_close($ch);
// Check if PayPal verifies the IPN data, and if so, return true.
if ($res == self::VALID) {
return true;
} else {
return false;
}
}
}
I'm receving a message at the error log of my server that says:
[25-Feb-2018 16:46:49 UTC] PHP Fatal error: Uncaught exception 'Exception' with message 'Missing POST Data' in /home2/laplatas/public_html/php/PaypalIPN.php:72
Stack trace:
#0 /home2/laplatas/public_html/php/zzz.php(11): PaypalIPN->verifyIPN()
#1 {main}
thrown in /home2/laplatas/public_html/php/PaypalIPN.php on line 72
[25-Feb-2018 16:47:44 UTC] PHP Fatal error: Uncaught exception 'Exception' with message 'Missing POST Data' in /home2/laplatas/public_html/php/PaypalIPN.php:72
Stack trace:
#0 /home2/laplatas/public_html/php/zzz.php(11): PaypalIPN->verifyIPN()
#1 {main}
thrown in /home2/laplatas/public_html/php/PaypalIPN.php on line 72
I have tryed everything but no success, I have readed also that could be that my server is not allowing post requests properly but it's the first issue I know about that, and if so, How do I change these file to allow post requests?
I have also open a question in paypal community... the issue is common but nobody answers properly
https://www.paypal-community.com/t5/IPN-PDT/Missing-POST-Data/m-p/1448349#M153

Answer 1

THANKS A LOT TO #Athrun Zara & #rtfm. I'VE GOT THE SOLUTION!!!!
If you find yourself with this issue, just check on your web server if they have dissabled the EMPTY post request, that's what was blocking the whole thing, not programming issues. The thing is that Paypal firsts checks if the adress is real with an empty call, that your web server will reject.
It's been more than 10 hours of work to the bin...well I have learn the whole process as an expert and open an unexisting and unkwon issue in every programming website.