public static function init()
{
if (!self::$_instance) {
self::$_instance = new WP_User_Frontend();
}
return self::$_instance;
}
/**
* Validate the IPN notification
*
* @param none
* @return boolean
*/
public function validateIpn()
{
global $wp_version;
WP_User_Frontend::log('paypal', 'Checking if PayPal IPN response is valid');
$this->set_mode();
// Get received values from post data
$validate_ipn = array('cmd' => '_notify-validate');
$validate_ipn += wp_unslash($_POST);
// Send back post vars to paypal
$params = array('body' => $validate_ipn, 'timeout' => 60, 'httpversion' => '1.1', 'compress' => false, 'decompress' => false, 'user-agent' => 'WordPress/' . $wp_version . '; ' . home_url('/'));
$response = wp_safe_remote_post($this->gateway_url, $params);
WP_User_Frontend::log('paypal', 'IPN Request: ' . print_r($params, true));
WP_User_Frontend::log('paypal', 'IPN Response: ' . print_r($response, true));
// check to see if the request was valid
if (!is_wp_error($response) && $response['response']['code'] >= 200 && $response['response']['code'] < 300 && strstr($response['body'], 'VERIFIED')) {
WP_User_Frontend::log('paypal', 'Received valid response from PayPal');
return true;
}
WP_User_Frontend::log('paypal', 'Received invalid response from PayPal');
if (is_wp_error($response)) {
WP_User_Frontend::log('paypal', 'Error response: ' . $response->get_error_message());
}
return false;
}
