function qpp_ipn_page()
{
if (isset($_POST['Submit']) && check_admin_referer("save_qpp")) {
$options = array('ipn', 'paid', 'title');
foreach ($options as $item) {
$ipn[$item] = stripslashes($_POST[$item]);
$ipn[$item] = filter_var($ipn[$item], FILTER_SANITIZE_STRING);
}
update_option('qpp_ipn', $ipn);
qpp_admin_notice("The IPN settings have been updated.");
}
if (isset($_POST['Reset']) && check_admin_referer("save_qpp")) {
delete_option('qpp_ipn');
qpp_admin_notice("The IPN settings have been reset.");
}
$ipn = qpp_get_stored_ipn();
$content = '<div class="qpp-settings"><div class="qpp-options">
<h2>Instant Payment Notifications</h2>
<form method="post" action="">
<p>IPN only works if you have a PayPal Business or Premier account and IPN has been set up on that account.</p>
<p>See the <a href="https://developer.paypal.com/webapps/developer/docs/classic/ipn/integration-guide/IPNSetup/">PayPal IPN Integration Guide</a> for more information on how to set up IPN.</p>
<p>The IPN listener URL you will need is:<pre>' . site_url('/?qpp_ipn') . '</pre></p>
<p>To check completed payments click on the <b>Payments</b> link in your dashboard menu or <a href="?page=quick-paypal-payments/quick-paypal-messages.php">click here</a>.</p>
<table>
<tr>
<td><input type="checkbox" style="margin:0; padding: 0; border: none" name="ipn" ' . $ipn['ipn'] . ' value="checked" /></td>
<td colspan="2"> Enable IPN.</td>
</tr>
<tr>
<td></td>
<td>Payment Report Column header:</td>
<td><input type="text" style="width:100%" name="title" value="' . $ipn['title'] . '" /></td>
</tr>
<tr>
<td></td>
<td>Payment Complete Label:</td>
<td><input type="text" style="width:100%" name="paid" value="' . $ipn['paid'] . '" /></td>
</tr>
</table>
<p><input type="submit" name="Submit" class="button-primary" style="color: #FFF;" value="Save Changes" /> <input type="submit" name="Reset" class="button-primary" style="color: #FFF;" value="Reset" onclick="return window.confirm( \'Are you sure you want to reset the IPN settings?\' );"/></p>';
$content .= wp_nonce_field("save_qpp");
$content .= '</form>
</div>
<div class="qpp-options" style="float:right;">
<h2>IPN Simulation</h2>
<p>IPN can be blocked or resticted by your server settings, theme or other plugins. The good news is you can simulate the notifications to check if all is working.</p>
<p>To carry out a simulation:</p>
<ol>
<li>Enable the PayPal Sandbox on the <a href="?page=quick-paypal-payments/settings.php&tab=setup">plugin setup page</a></li>
<li>Fill in and send your payment form (you do not need to make an actual payment)</li>
<li>Go to the <a href="?page=quick-paypal-payments/quick-paypal-messages.php">Payments Report</a> and copy the long number in the last column from the payment you have just made</li>
<li>Go to the IPN simulation page: <a href="https://developer.paypal.com/developer/ipnSimulator" target="_blank">https://developer.paypal.com/developer/ipnSimulator</a></li>
<li>Login and enter the IPN listener URL</li>
<li>Select \'Express Checkout\' from the drop down</li>
<li>Scroll to the bottom of the page and enter the long number you copied at step 3 into the \'Custom\' field</li>
<li>Click \'Send IPN\'. Scroll up the page and you should see an \'IPN Verified\' message.</li>
<li>Go back to your Payments Report and refresh, you should now see the payment completed message</li>
</ol>
</div>
</div>';
echo $content;
}
function qpp_ipn()
{
$qpp_setup = qpp_get_stored_setup();
$qpp_ipn = qpp_get_stored_ipn();
if (!isset($_REQUEST['paypal_ipn_result']) && !$qpp_ipn['ipn']) {
return;
}
define("DEBUG", 1);
define("LOG_FILE", "./ipn.log");
$raw_post_data = file_get_contents('php://input');
$raw_post_array = explode('&', $raw_post_data);
$myPost = array();
foreach ($raw_post_array as $keyval) {
$keyval = explode('=', $keyval);
if (count($keyval) == 2) {
$myPost[$keyval[0]] = urldecode($keyval[1]);
}
}
$req = 'cmd=_notify-validate';
if (function_exists('get_magic_quotes_gpc')) {
$get_magic_quotes_exists = true;
}
foreach ($myPost as $key => $value) {
if ($get_magic_quotes_exists == true && get_magic_quotes_gpc() == 1) {
$value = urlencode(stripslashes($value));
} else {
$value = urlencode($value);
}
$req .= "&{$key}={$value}";
}
if ($qpp_setup['sandbox']) {
$paypal_url = 'https://www.sandbox.paypal.com/cgi-bin/webscr';
} else {
$paypal_url = "https://www.paypal.com/cgi-bin/webscr";
}
$ch = curl_init($paypal_url);
if ($ch == FALSE) {
return FALSE;
}
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $req);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
curl_setopt($ch, CURLOPT_FORBID_REUSE, 1);
if (DEBUG == true) {
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLINFO_HEADER_OUT, 1);
}
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Connection: Close'));
$res = curl_exec($ch);
if (curl_errno($ch) != 0) {
if (DEBUG == true) {
error_log(date('[Y-m-d H:i e] ') . "Can't connect to PayPal to validate IPN message: " . curl_error($ch) . PHP_EOL, 3, LOG_FILE);
}
curl_close($ch);
exit;
} else {
if (DEBUG == true) {
error_log(date('[Y-m-d H:i e] ') . "HTTP request of validation request:" . curl_getinfo($ch, CURLINFO_HEADER_OUT) . " for IPN payload: {$req}" . PHP_EOL, 3, LOG_FILE);
error_log(date('[Y-m-d H:i e] ') . "HTTP response of validation request: {$res}" . PHP_EOL, 3, LOG_FILE);
}
curl_close($ch);
}
$tokens = explode("\r\n\r\n", trim($res));
$res = trim(end($tokens));
if (strcmp($res, "VERIFIED") == 0) {
$custom = $_POST['custom'];
$arr = explode(",", $qpp_setup['alternative']);
foreach ($arr as $item) {
$message = get_option('qpp_messages' . $item);
$count = count($message);
for ($i = 0; $i <= $count; $i++) {
if ($message[$i]['field18'] == $custom) {
$message[$i]['field18'] = 'Paid';
$auto = qpp_get_stored_autoresponder($item);
if ($auto['enable'] && $message[$i]['field8'] && $auto['whenconfirm'] == 'afterpayment') {
$values = array('reference' => $message[$i]['field1'], 'quantity' => $message[$i]['field2'], 'amount' => $message[$i]['field3'], 'stock' => $message[$i]['field4'], 'option1' => $message[$i]['field5'], 'email' => $message[$i]['field8'], 'firstname' => $message[$i]['field9'], 'lastname' => $message[$i]['field10']);
qpp_send_confirmation($values, $item, $message[$i]['field3']);
}
update_option('qpp_messages' . $item, $message);
}
}
}
if (DEBUG == true) {
error_log(date('[Y-m-d H:i e] ') . "Verified IPN: {$req} " . PHP_EOL, 3, LOG_FILE);
}
} else {
if (strcmp($res, "INVALID") == 0) {
if (DEBUG == true) {
error_log(date('[Y-m-d H:i e] ') . "Invalid IPN: {$req}" . PHP_EOL, 3, LOG_FILE);
}
}
}
}