The PayPal_IPN class provides an simple way of capturing the PayPal POST data,
confirming it with PayPal and then making it available to the application.


Minimum Example
include_once 'PayPal_IPN.php';
$PayPal = new PayPal_IPN();
$PayPal->set_paypal_email('your_paypal@email_address.com');
$PayPal->get_ipn();

The returned data can then be accessed using the available variables - example
$PayPal->amount;							//payment total
$PayPal->customer_details['first_name'];	//customer first name
$PayPal->error;								//Any errors generated during data processing