• Version 3.6.0
• Author: Nick Baker (nick@webtechnick.com)
• Website: http://www.webtechnick.com

• Download: http://projects.webtechnick.com/paypal_ipn.tar.gz
• GIT: git@github.com:webtechnick/CakePHP-Paypal-IPN-Plugin.git

CakePHP 1.2.x/1.3.x

http://github.com/webtechnick

• 1.0: Initial release
• 1.1: Added cleaner routes
• 2.0: Helper added
• 2.1: Added cake schema install script
• 2.2: Added paypal unsubscribe type
• 2.2.1: Bug fix with subscription issues
• 2.2.2: Fixed validation issues with paypal button in strict doctype
• 3.0: Added new basic Paypal IPN email capabality.
• 3.5 Added checkout feature for multiple items paypal button. Documentation bellow
• 3.5.1: Renamed columns option_name_1 and option_name_2 to option_name1 and option_name2 respectively
• 3.5.2: Updating to latest conventions in CakePHP 1.3, no longer requires Auth, all cart items will be reviewable in paypal_items table
• 3.6.0: Adding View Cart button option

open a terminal and execute the following command:

$ cake schema create -path plugins/paypal_ipn/config/sql -name items

1. Copy plugin into your /app/plugins/paypal_ipn directory

2. Run

    $ cake schema create -path plugins/paypal_ipn/config/sql -name ipn
   

3. Add the following into your /app/config/routes.php file (optional):

    /* Paypal IPN plugin */
    Router::connect('/paypal_ipn/process', array('plugin' => 'paypal_ipn', 'controller' => 'instant_payment_notifications', 'action' => 'process'));
    /* Optional Route, but nice for administration */
    Router::connect('/paypal_ipn/:action/*', array('admin' => 'true', 'plugin' => 'paypal_ipn', 'controller' => 'instant_payment_notifications', 'action' => 'index'));
    /* End Paypal IPN plugin */
   

1. I suggest you start a sandbox account at https://developer.paypal.com
2. Enable IPN in your account.

1. Make sure you're logged in as an Administrator via the Auth component.
2. Navigate to www.yoursite.com/paypal_ipn

1. Update /paypal_ipn/config/paypal_ipn_config.php with your paypal information

2. Add PaypalIpn.Paypal to your helpers list in app_controller.php

   var $helpers = array('Html','Form','PaypalIpn.Paypal');

   $paypal->button(String tittle, Options array); 
     
   $paypal->button('Pay Now', array('amount' => '12.00', 'item_name' => 'test item'));
   $paypal->button('Subscribe', array('type' => 'subscribe', 'amount' => '60.00', 'term' => 'month', 'period' => '2'));
   $paypal->button('Donate', array('type' => 'donate', 'amount' => '60.00'));
   $paypal->button('Add To Cart', array('type' => 'addtocart', 'amount' => '15.00'));
   $paypal->button('View Cart', array('type' => 'viewcart', 'amount' => '15.00'));
   $paypal->button('Unsubscribe', array('type' => 'unsubscribe'));
   $paypal->button('Checkout', array(
				'type' => 'cart',
				'items' => array(
					array('item_name' => 'Item 1', 'amount' => '120', 'quantity' => 2, 'item_number' => '1234'),
					array('item_name' => 'Item 2', 'amount' => '50'),
					array('item_name' => 'Item 3', 'amount' => '80', 'quantity' => 3),
				)
			));
			
   //Test Example
   $paypal->button('Pay Now', array('test' => true, 'amount' => '12.00', 'item_name' => 'test item'));

Instead of the Paypal Helper you can use your custom buttons but make sure to set notify_url to your configured route.

<form action="https://www.paypal.com/cgi-bin/webscr" method="post">
	...
	<input type="hidden" name="notify_url" value="http://www.yoursite.com/paypal_ipn/process" />
	...
</form>

It is generally recommened to use the paypal helper as it will generate everything for you based on your configurations

Create a function in your /app/app_controller.php like so:

function afterPaypalNotification($txnId){
	//Here is where you can implement code to apply the transaction to your app.
	//for example, you could now mark an order as paid, a subscription, or give the user premium access.
	//retrieve the transaction using the txnId passed and apply whatever logic your site needs.
	
	$transaction = ClassRegistry::init('PaypalIpn.InstantPaymentNotification')->findById($txnId);
	$this->log($transaction['InstantPaymentNotification']['id'], 'paypal');
	
	//Tip: be sure to check the payment_status is complete because failure 
	//     are also saved to your database for review.
	
	if($transaction['InstantPaymentNotification']['payment_status'] == 'Completed'){
		//Yay!  We have monies!
	}
	else {
		//Oh no, better look at this transaction to determine what to do; like email a decline letter.
	}
} 

Utility method to send basic emails based on a paypal IPN transaction. This method is very basic, if you need something more complicated I suggest creating your own method in the afterPaypalNotification function you build in the app_controller.php

$IPN = ClassRegistry::init('PaypalIpn.InstantPaymentNotification');
$IPN->id = '4aeca923-4f4c-49ec-a3af-73d3405bef47';
$IPN->email('Thank you for your transaction!');

//OR passed in as an array of options
$IPN->email(array(
	'id' => '4aeca923-4f4c-49ec-a3af-73d3405bef47',
	'subject' => 'Donation Complete!',
	'message' => 'Thank you for your donation!',
	'sendAs' => 'text'
));

Hint: use this in your afterPaypalNotification callback in your app_controller.php

function afterPaypalNotification($txnId){
	ClassRegistry::init('PaypalIpn.InstantPaymentNotification')->email(array(
		'id' => $txnId,
		'subject' => 'Thanks!',
		'message' => 'Thank you for the transaction!'
	));
}

• id: id of instant payment notification to base email off of
• subject: subject of email (default: Thank you for your paypal transaction)
• sendAs: html | text (default: html)
• to: email address to send email to (default: ipn payer_email)
• from: from email address (default: ipn business)
• cc: array of email addresses to carbon copy to (default: array())
• bcc: array of email addresses to blind carbon copy to (default: array())
• layout: layout of email to send (default: default)
• template: template of email to send (default: null)
• log: boolean true | false if you'd like to log the email being sent. (default: true)
• message: actual body of message to be sent (default: null)