Не работает авторизация на сайте (скрипт) помогите

сначало все было норм ,работало но щас перестало :(


<?
session_start();
$refid = $_SESSION['ref'];
require("config.php");

$client_id = "8167544"; // ID приложения
$client_secret = ""; // Защищённый ключ
$redirect_uri = "https://".$_SERVER['SERVER_NAME']."/auth.php"; // Адрес сайта
$url = 'http://oauth.vk.com/authorize';


if (isset($_GET['code'])) {
$result = true;
$params = [
'client_id' => $client_id,
'client_secret' => $client_secret,
'code' => $_GET['code'],
'redirect_uri' => $redirect_uri
];

$token = json_decode(file_get_contents('https://oauth.vk.com/access_token' . '?' . urldecode(http_build_query($params))), true);

if (isset($token['access_token'])) {
$params = [
'uids' => $token['user_id'],
'fields' => 'uid,first_name,last_name,screen_name,sex,bdate,photo_big',
'access_token' => $token['access_token'],
'v' => '5.101'];

$userInfo = json_decode(file_get_contents('https://api.vk.com/method/users.get' . '?' . urldecode(http_build_query($params))), true);
if (isset($userInfo['response'][0]['id'])) {
$userInfo = $userInfo['response'][0];
$result = true;
}
}
// инфа о пользователе

$vk_id_s = $userInfo['id'];
$fname = $userInfo['first_name'];
$last_name = $userInfo['last_name'];
$name = "$fname $last_name";
$ava = $userInfo['photo_big'];
$hashq = "http://vk.com/id$vk_id_s";
if($vk_id_s == ''){
exit('Ошибка');
}
// получили инфу о пользователе, пользователь имеется в бд
//$network = $user['network'];



$sql_select2 = "SELECT COUNT(*) FROM users WHERE hash='$hashq'";
$result2 = mysql_query($sql_select2);
$row = mysql_fetch_array($result2);
if($row)
{
$logc = $row['COUNT(*)'];
}

if($logc == 0) {
if($hashq != '') {
$datas = date("d.m.Y");
$data = $datas;

$client = @$_SERVER['HTTP_CLIENT_IP'];
$forward = @$_SERVER['HTTP_X_FORWARDED_FOR'];
$remote = @$_SERVER['REMOTE_ADDR'];

if(filter_var($client, FILTER_VALIDATE_IP)) $ip = $client;
elseif(filter_var($forward, FILTER_VALIDATE_IP)) $ip = $forward;
else $ip = $remote;


$passgen = rand(100,1000) * rand(1,100) * rand(1,100) * 100;
$_SESSION['login'] = 1;
$length = 10;
$refcode = substr(str_shuffle('0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ'),1,$length);
$insert_sql1 = "INSERT INTO `users` (`id`,`vk_name`,`vk_id`, `balance`, `img`, `ref_code`, `hash`, `social`, `ip`, `date_reg`)
VALUES ('NULL','$name', '$vk_id_s','$bonus_reg', '$ava', '$refcode', '$hashq', '$hashq', '$ip', '$data');";
mysql_query($insert_sql1);

$sql_select22 = "SELECT * FROM users WHERE id ='$refid'";
$result22 = mysql_query($sql_select22);
$row2 = mysql_fetch_array($result22);
if($row2)
{
$balance = $row2['balance'];
}

mysql_query("UPDATE users set balance= $balance + 1 where id='$refid'");
$_SESSION['hash'] = $hashq;
$_SESSION['login'] = 1;
$home_url = 'http://'.$_SERVER['HTTP_HOST'] .'/';
header('Location: ' . $home_url);

}
}
if($logc == 1) {
if($hashq != '') {
$selecter = "SELECT * FROM users WHERE hash = '$hashq'";
$result3 = mysql_query($selecter);
$row1 = mysql_fetch_array($result3);
if($row1)
{
$admin = $row1['admin'];
$**** = $row1['****'];
$hashlog = $row1['hash'];

}



$client = @$_SERVER['HTTP_CLIENT_IP'];
$forward = @$_SERVER['HTTP_X_FORWARDED_FOR'];
$remote = @$_SERVER['REMOTE_ADDR'];

if(filter_var($client, FILTER_VALIDATE_IP)) $ip = $client;
elseif(filter_var($forward, FILTER_VALIDATE_IP)) $ip = $forward;
else $ip = $remote;

mysql_query("UPDATE users SET ip = '$ip' WHERE hash = '$hashq'");
mysql_query("UPDATE users SET vk_id = '$vk_id_s' WHERE hash = '$hashq'");
mysql_query("UPDATE users SET img = '$ava' WHERE hash = '$hashq'");

$_SESSION['hash'] = $hashlog;
$_SESSION['login'] = 1;
$home_url = 'http://'.$_SERVER['HTTP_HOST'] .'/';
header('Location: ' . $home_url);
}
}




}
?>