cakephp PayPal IPN Integration - cakephp

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 !

Answer 1

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

Answer 2

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.