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- <?php
- // CONFIG: Enable debug mode. This means we'll log requests into 'ipn.log' in the same directory.
- // Especially useful if you encounter network errors or other intermittent problems with IPN (validation).
- // Set this to 0 once you go live or don't require logging.
- define("DEBUG", 1);
- // Set to 0 once you're ready to go live
- define("USE_SANDBOX", 1);
- define("LOG_FILE", "./ipn.log");
- // Read POST data
- // reading posted data directly from $_POST causes serialization
- // issues with array data in POST. Reading raw POST data from input stream instead.
- $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)
- $myPost[$keyval[0]] = urldecode($keyval[1]);
- }
- // read the post from PayPal system and add 'cmd'
- $req = 'cmd=_notify-validate';
- 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 IPN data back to PayPal to validate the IPN data is genuine
- // Without this step anyone can fake IPN data
- if(USE_SANDBOX == true) {
- $paypal_url = "https://www.sandbox.paypal.com/cgi-bin/webscr";
- } else {
- $paypal_url = "https://www.paypal.com/cgi-bin/webscr";
- }
- $ch = curl_init($paypal_url);
- if ($ch == FALSE) {
- return FALSE;
- }
- curl_setopt($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_SSL_VERIFYPEER, 1);
- curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
- curl_setopt($ch, CURLOPT_FORBID_REUSE, 1);
- if(DEBUG == true) {
- curl_setopt($ch, CURLOPT_HEADER, 1);
- curl_setopt($ch, CURLINFO_HEADER_OUT, 1);
- }
- // CONFIG: Optional proxy configuration
- //curl_setopt($ch, CURLOPT_PROXY, $proxy);
- //curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
- // Set TCP timeout to 30 seconds
- curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
- curl_setopt($ch, CURLOPT_HTTPHEADER, array('Connection: Close'));
- // CONFIG: Please download 'cacert.pem' from "http://curl.haxx.se/docs/caextract.html" and set the directory path
- // of the certificate as shown below. Ensure the file is readable by the webserver.
- // This is mandatory for some environments.
- //$cert = __DIR__ . "./cacert.pem";
- //curl_setopt($ch, CURLOPT_CAINFO, $cert);
- $res = curl_exec($ch);
- if (curl_errno($ch) != 0) // cURL error
- {
- if(DEBUG == true) {
- error_log(date('[Y-m-d H:i e] '). "Can't connect to PayPal to validate IPN message: " . curl_error($ch) . PHP_EOL, 3, LOG_FILE);
- }
- curl_close($ch);
- exit;
- } else {
- // Log the entire HTTP response if debug is switched on.
- if(DEBUG == true) {
- error_log(date('[Y-m-d H:i e] '). "HTTP request of validation request:". curl_getinfo($ch, CURLINFO_HEADER_OUT) ." for IPN payload: $req" . PHP_EOL, 3, LOG_FILE);
- error_log(date('[Y-m-d H:i e] '). "HTTP response of validation request: $res" . PHP_EOL, 3, LOG_FILE);
- }
- curl_close($ch);
- }
- // Inspect IPN validation result and act accordingly
- // Split response headers and payload, a better way for strcmp
- $tokens = explode("\r\n\r\n", trim($res));
- $res = trim(end($tokens));
- if (strcmp ($res, "VERIFIED") == 0) {
- // check whether the payment_status is Completed
- // check that txn_id has not been previously processed
- // check that receiver_email is your PayPal email
- // check that payment_amount/payment_currency are correct
- // process payment and mark item as paid.
- // assign posted variables to local variables
- //$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'];
- $mail_From = "IPN@example.com";
- $mail_To = "flarmiey@gmail.com";
- $mail_Subject = "VERIFIED IPN";
- $mail_Body = $req;
- mail($mail_To, $mail_Subject, $mail_Body, $mail_From);
- if(DEBUG == true) {
- error_log(date('[Y-m-d H:i e] '). "Verified IPN: $req ". PHP_EOL, 3, LOG_FILE);
- }
- } else if (strcmp ($res, "INVALID") == 0) {
- // log for manual investigation
- // Add business logic here which deals with invalid IPN messages
- if(DEBUG == true) {
- error_log(date('[Y-m-d H:i e] '). "Invalid IPN: $req" . PHP_EOL, 3, LOG_FILE);
- }
- $mail_From = "IPN@example.com";
- $mail_To = "flarmiey@gmail.com";
- $mail_Subject = "no IPN";
- $mail_Body = $req;
- mail($mail_To, $mail_Subject, $mail_Body, $mail_From);
- }
- ?>
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