cakephp PayPal IPN Integration

Question

I am using CakePHP 1.3.10 version and want to integrate PayPal IPN for Payment Process.

I have found some ready made plug-ins though not working properly and returning bunch of errors.

I would like your suggestions, Any body in community using the same with success and any tutorial to integrate in easy steps.

Your response would be appreciated.

Thanks !

when i enable PayPal IPN in my sandbox developer account, it says `IPN delivery failed. Unable to connect to the specified URL. Please verify the URL and try again.` Why? — Aditya P Bhatt, Jul 20 '11 at 12:14
i am trying to set URL, but gives above error, when i keep any live website, it works, but whenever some IP like 202.. a live working IP from browser, is not accepted there — Aditya P Bhatt, Jul 21 '11 at 08:16

score 4 · Answer 1 · answered Nov 29 '12 at 09:35

I just discovered a nice PHP class, that runs all the PayPal IPN.

https://github.com/Quixotix/PHP-PayPal-IPN/

I turned it into a Component for my CakePhp project. For this just create a new Component in you app/Controller/Components/ folder and paste the code from that project. Then Change:

class IpnListener {
...

to

class IpnListener extends Component {
...

Then go back to the controller you want to you PayPal Ipn with and add:

public $components = array('IpnListener');

You can than access the class using:

$this->IpnListener->foo

within your controller functions

Hope this helps

score 0 · Accepted Answer · answered Jul 20 '11 at 10:35

I used Paypal IPN with cake before, and it's simple enough to not have to reply on a plugin. Are you using that to track getting payment in a cake app? You can create the paypal form/button in your paypal account, set the url callback so paypal can notify you. Create a table in DB if you want to record the info paypal sends you. Have a method in the controller to handle the POST data from paypal. Here's my code example:

function blah() {
   $this->autoRender = false;
   // post back to PayPal system to validate
   $req = 'cmd=_notify-validate';
   foreach ($_POST as $key => $value) {
      $value = urlencode(stripslashes($value));
      $req .= "&$key=$value";
   }
   $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.paypal.com', 443, $errno, $errstr, 30);
   if (!$fp) {// HTTP ERROR, we should record the data still..?
   } else {
      fputs($fp, $header . $req);
      while (!feof($fp)) {
         $res = fgets($fp, 1024);
         if (strcmp($res, "VERIFIED") == 0) {// verified from paypal, processing...
         } else if (strcmp($res, "INVALID") == 0) {
            // oh no, someone is hijacking us...
         }
      }
      fclose($fp);
   }
}

What fields to have in the table depends on what you want to keep. Look up the IPN API, and you can setup sandbox testing with paypal.

cakephp PayPal IPN Integration

2 Answers2