Improve eShop PayPal IPN for SSL

--- eshop-paypal.class.php  Wed Jun 06 13:11:32 2012
+++ fix.php Wed Jun 06 13:12:27 2012
@@ -196,17 +196,30 @@
       }
       $post_string.="cmd=_notify-validate"; // append ipn command

-       // open the connection to paypal was:
-       //$fp = fsockopen($url_parsed[host],"80",$err_num,$err_str,30);
-       //try uncommenting that line if the following doesn't work.
-       $fp = fsockopen ('ssl://'.$url_parsed[host], "443", $err_no, $err_str, 30);
-      if(!$fp) {
-         // could not open the connection.  If loggin is on, the error message
-         // will be in the log.
-         $this->last_error = "fsockopen error no. $errnum: $errstr";
-         $this->log_ipn_results(false);
-         return false;
-
+   $ipnhost= $url_parsed['host'];
+   $ipnport= 80;
+
+   if (function_exists('stream_get_transports')) {
+       $transports= stream_get_transports();
+       if (in_array('ssl', $transports)) {
+           $ipnport= 443;
+       }
+   }
+
+   if ($ipnport == 443) {
+       $ipnhost= "ssl://$ipnhost";
+   }
+
+   $fp = fsockopen($ipnhost, $ipnport, $err_no, $err_str, 30);
+
+   if(!$fp) {
+       // could not open the connection.  If loggin is on, the error message
+       // will be in the log. // TYPO FIXES:
+       $this->last_error = "fsockopen error no. $err_no: $err_str";
+       $this->last_error .= "\n host= $ipnhost, port= $ipnport";
+       $this->log_ipn_results(false);
+       return false;
+
       } else {

          // Post the data back to paypal
@@ -236,6 +249,7 @@

          // Invalid IPN transaction.  Check the log for details.
          $this->last_error = 'IPN Validation Failed.';
+         $this->last_error .= "\n host= $ipnhost, port= $ipnport";
          $this->log_ipn_results(false);
          return false;