if (!defined('SMF'))

 	die('Hacking attempt...');

 class paypal_display

 {

 	public $title = 'PayPal';

 	public function getGatewaySettings()

 	{

 		global $txt;

 		$setting_data = array(

 		);

 		return $setting_data;

 	}

 	public function gatewayEnabled()

 	{

 		global $modSettings;

 		return !empty($modSettings['paypal_email']);

 	}

 	public function fetchGatewayFields($unique_id, $sub_data, $value, $period, $return_url)

 	{

 		global $modSettings, $txt, $boardurl;

 	}

 }

 class paypal_payment

 {

 	private $return_data;

 	public function isValid()

 	{

 		global $modSettings;

 		// Correct email address?

 		if (!isset($_POST['business']))

 			$_POST['business'] = $_POST['receiver_email'];

 			return false;

 		return true;

 	}

 	public function precheck()

 	{

 		global $modSettings, $txt;

 		// Build the request string - starting with the minimum requirement.

 		$requestString = 'cmd=_notify-validate';

 		foreach ($_POST as $k => $v)

 			$requestString .= '&' . $k . '=' . urlencode($v);

 		// Can we use curl?

 		{

 			// Set the post data.

 			curl_setopt($curl, CURLOPT_POST, true);

 			curl_setopt($curl, CURLOPT_POSTFIELDSIZE, 0);

 			curl_setopt($curl, CURLOPT_POSTFIELDS, $requestString);

 			// Fetch the data returned as a string.

 			curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

 		else

 		{

 			// Setup the headers.

 			$header .= 'Content-Type: application/x-www-form-urlencoded' . "\r\n";

 			// Open the connection.

 			// Did it work?

 			if (!$fp)

 			while (!feof($fp))

 			{

 				$this->return_data = fgets($fp, 1024);

 					break;

 			}

 		}

 		// If this isn't verified then give up...

 			exit;

 		// Check that this is intended for us.

 			exit;

 		if ($this->isSubscription() && (empty($_POST['item_number']) || strpos($_POST['item_number'], '+') === false))

 			// Calculate the subscription it relates to!

 			$this->_findSubscription();

 		// Verify the currency!

 			exit;

 		// Can't exist if it doesn't contain anything.

 		return explode('+', $_POST['item_number']);

 	}

 	public function isRefund()

 	{

 			return true;

 		else

 			return false;

 	}

 	public function isSubscription()

 	{

 			return true;

 		else

 			return false;

 	}

 	public function isPayment()

 	{

 			return true;

 		else

 			return false;

 	}

 	public function getCost()

 	{

 	}

 	public function close()

 	{

 		global $smcFunc, $subscription_id;

 		exit();

 	}

 	private function _findSubscription()

 	{

 		global $smcFunc;

 						'payer_email' => $_POST['payer_email'],

 					)

 				);

 					return false;

 			}

 			else

 /**

  * This file is the file which all subscription gateways should call

  * when a payment has been received - it sorts out the user status.

  * Simple Machines Forum (SMF)

  *

  * @package SMF

 // If we have some custom people who find out about problems load them here.

 $notify_users = array();

 if (!empty($modSettings['paid_email_to']))

 	foreach (explode(',', $modSettings['paid_email_to']) as $email)

 		$notify_users[] = array(

 			'email' => $email,

 			'name' => $txt['who_member'],

 			'id' => 0,

 		);

 // We need to see whether we can find the correct payment gateway,

 // we'll going to go through all our gateway scripts and find out

 	generateSubscriptionError($txt['paid_unknown_transaction_type']);

 // Get the subscription and member ID amoungst others...

 // Integer these just in case.

 $subscription_id = (int) $subscription_id;

 	)

 );

 // Didn't find them?

 	generateSubscriptionError(sprintf($txt['paid_could_not_find_member'], $member_id));

 $member_info = $smcFunc['db_fetch_assoc']($request);

 $smcFunc['db_free_result']($request);

 );

 // Didn't find it?

 	generateSubscriptionError(sprintf($txt['paid_count_not_find_subscription'], $member_id, $subscription_id));

 $subscription_info = $smcFunc['db_fetch_assoc']($request);

 		'current_member' => $member_id,

 	)

 );

 	generateSubscriptionError(sprintf($txt['paid_count_not_find_subscription_log'], $member_id, $subscription_id));

 $subscription_info += $smcFunc['db_fetch_assoc']($request);

 $smcFunc['db_free_result']($request);

 		$real_details = @unserialize($subscription_info['pending_details']);

 		if (empty($real_details))

 			generateSubscriptionError(sprintf($txt['paid_count_not_find_outstanding_payment'], $member_id, $subscription_id));

 		// Now we just try to find anything pending.

 		// We don't really care which it is as security happens later.

 		foreach ($real_details as $id => $detail)

 				$subscription_info['payments_pending']--;

 			break;

 		}

 		$subscription_info['pending_details'] = empty($real_details) ? '' : serialize($real_details);

 		$smcFunc['db_query']('', '

 	if ($subscription_info['length'] == 'F')

 	{

 		$found_duration = 0;

 		// This is a little harder, can we find the right duration?

 		foreach ($cost as $duration => $value)

 		{

 		}

 		// If we have the duration then we're done.

 		{

 			$notify = true;

 			addSubscription($subscription_id, $member_id, $found_duration);

 	else

 	{

 		$actual_cost = $cost['fixed'];

 		// It must be at least the right amount.

 		if ($total_cost != 0 && $total_cost >= $actual_cost)

 		{

 		emailAdmins('paid_subscription_new', $replacements, $notify_users);

 	}

 }

 // In case we have anything specific to do.

 $gatewayClass->close();

 function generateSubscriptionError($text)

 {

 	global $modSettings, $notify_users, $smcFunc;

 	// Maybe we can try to give them the post data?

 	if (!empty($_POST))

 		foreach ($_POST as $key => $val)

 			$text .= '<br />' . $smcFunc['htmlspecialchars']($key) . ': ' . $smcFunc['htmlspecialchars']($val);

 	// Then just log and die.

 	log_error($text);