if ($post_count_for_pages_number==1){
                        $pageviewselectorleft=0;
                        $pageviewselectorright=0;
                    } elseif ($post_count_for_pages_number==2){
                        if (empty($_GET['page']) or $_GET['page'] == 1){
                            $pageviewselectorleft=0;
                            $pageviewselectorright=1;
                        } else {
                            $pageviewselectorleft=1;
                            $pageviewselectorright=0;
                        }
                    } elseif ($post_count_for_pages_number==3){
                        if (empty($_GET['page']) or $_GET['page'] == 1){
                            $pageviewselectorleft=0;
                            $pageviewselectorright=2;
                        } elseif ($_GET['page'] == 2){
                            $pageviewselectorleft=1;
                            $pageviewselectorright=1;
                        } elseif ($_GET['page'] == 3){
                            $pageviewselectorleft=2;
                            $pageviewselectorright=0;
                        }
                    } elseif ($post_count_for_pages_number>3){
                        $pageviewselectorleft=2;
                        $pageviewselectorright=2;
                    switch ($_GET['page']){
                        case '1':
                         $pageviewselectorleft=0;
                         break;
                        case '2':
                         $pageviewselectorleft=1;
                         break;
                        case $post_count_for_pages_number:
                         $pageviewselectorright=0;
                         break;
                        case ($post_count_for_pages_number-1):
                         $pageviewselectorright=1;
                         break;
                    }
                    }

                         $floors_html .= '<div id="kv_floor'.$floor->id.'" class="floor_cont">';
                         $floors_html .= '<div class="back_to_house" onclick="backtoKvartal('.$floor->id.', '.$kvartal->id.', '.$kvartal_or_width.', '.$house->id.', '.$h_or_width.');"><span>'.JText::_('PLG_FLOORPLAN_BACK_TO_HOUSE').'</span></div>';
                         $floors_html .= '<div class="floor_img" style="width: '.($percent[0] ? $percent[0] : 50).'%;">';
                         $floors_html .= '<div class="leftside"><div class="floor_desc">'.$floor->title.' ';
                         $floors_html .= '<a href="/images/floorplan/'.$floor->img.'" title="'.$floor->title.'" class="zoom_icon" rel="lightbox"><img src="/plugins/content/floorplan/lightbox/zoom.png" title="'.JText::_('PLG_FLOORPLAN_ZOOM_PLAN').'" class="map" /></a>';
                         $floors_html .= '</div>';
                         $floors_html .= '<div id="kv_floor_cntnr'.$floor->id.'"><span class="ramka_left"><img class="map" id="kv_floorimg'.$floor->id.'" src="/images/floorplan/'.$floor->img.'" alt="Floor'.$floor->id.'" usemap="#kv_Floor'.$floor->id.'" '.$style.'/></span></div>';
                         $floors_html .= '</div></div>';

<?php

// STEP 1: Read POST data

// reading posted data from directly from $_POST causes serialization
// issues with array data in POST
// reading raw POST data from input stream instead.
$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]);
}
// read the post from PayPal system and add 'cmd'
$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";
}


// STEP 2: Post IPN data back to paypal to validate

$ch = curl_init('https://www.paypal.com/cgi-bin/webscr');
curl_setopt($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);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Connection: Close'));

// In wamp like environments that do not come bundled with root authority certificates,
// please download 'cacert.pem' from "http://curl.haxx.se/docs/caextract.html" and set the directory path
// of the certificate as shown below.
// curl_setopt($ch, CURLOPT_CAINFO, dirname(__FILE__) . '/cacert.pem');
if( !($res = curl_exec($ch)) ) {
    // error_log("Got " . curl_error($ch) . " when processing IPN data");
    curl_close($ch);
    exit;
}
curl_close($ch);


// STEP 3: Inspect IPN validation result and act accordingly

if (strcmp ($res, "VERIFIED") == 0) {
    // check whether the payment_status is Completed
    // check that txn_id has not been previously processed
    // check that receiver_email is your Primary PayPal email
    // check that payment_amount/payment_currency are correct
    // process payment

    // assign posted variables to local variables
    $item_name = $_POST['item_name'];
    $item_number = $_POST['item_number'];
    $payment_status = $_POST['payment_status'];
    $payment_amount = $_POST['mc_gross'];
    $payment_currency = $_POST['mc_currency'];
    $txn_id = $_POST['txn_id'];
    $receiver_email = $_POST['receiver_email'];
    $payer_email = $_POST['payer_email'];
} else if (strcmp ($res, "INVALID") == 0) {
    // log for manual investigation
}
?>

http://kursovik/geturl.php?fn=result.php&key=".$secret."

$timeout = 600;

$secret = md5((int)(time() / $timeout));

md5((int)(time() / $timeout))

md5(((int)(time() / $timeout))-1)

date(y-m-d H:i:s) - date_из_БД(y-m-d H:i:s) > 15