function isCaptchaValid() {
  try {

    $url = 'https://www.google.com/recaptcha/api/siteverify';
    $data = [
      'secret'   => PRESS_AREA_RECAPTCHA_SECRET,
      'response' => $_POST['g-recaptcha-response'],
      'remoteip' => $_SERVER['REMOTE_ADDR']
    ];

    $options = [
      'http' => [
        'header'  => "Content-type: application/x-www-form-urlencoded\r\n",
        'method'  => 'POST',
        'content' => http_build_query($data)
      ]
    ];

    $context  = stream_context_create($options);
    $result = file_get_contents($url, false, $context);
    return json_decode($result)->success;
  }
  catch (Exception $e) {
      return null;
  }
}