private function sendAnalytics($data)
{
$data = utf8_encode($data);
$curl = curl_init();
$opts = [CURLOPT_URL => GOOGLE_ANALYITCS_URL, CURLOPT_RETURNTRANSFER => true, CURLOPT_POST => 'POST', CURLOPT_POSTFIELDS => $data];
curl_setopt_array($curl, $opts);
curl_exec($curl);
curl_close($curl);
}