<?php 
 
// Include the paypal library 
include_once ('TwoCo.php'); 
 
// Create an instance of the authorize.net library 
$my2CO = new TwoCo(); 
 
// Log the IPN results 
$my2CO->ipnLog = TRUE; 
 
// Specify your authorize login and secret 
$my2CO->setSecret('YOUR_SECRET_KEY'); 
 
// Enable test mode if needed 
$my2CO->enableTestMode(); 
 
// Check validity and write down it 
if ($my2CO->validateIpn()) 
{ 
    file_put_contents('2co.txt', 'SUCCESS'); 
} 
else 
{ 
    file_put_contents('2co.txt', "FAILURE\n\n" . $my2CO->ipnData); 
}
 
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