如何在WordPress中获取当前访问者国家/地区时区

I am currently using geoplugin

      function getusercountrycode()
      {
      $ip = $_SERVER['REMOTE_ADDR'];
      $ch = curl_init();
      $curlConfig = array(
          CURLOPT_URL            => "http://www.geoplugin.net/json.gp? 
      ip=".$ip,
          CURLOPT_POST           => true,
          CURLOPT_RETURNTRANSFER => true,
          CURLOPT_POSTFIELDS     => false
      );
      curl_setopt_array($ch, $curlConfig);
      $result = curl_exec($ch);
      curl_close($ch);
      $json_a=json_decode($result,true);
      $countrycode = $json_a['geoplugin_countryCode'];
      return $countrycode;
      }

here i m getting current visitor country name but i don't no how can get visitor timezone

Please help me and share code.

if any help for my side. please reply me message

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geoplugin_timezone get from here

$timezone= $json_a['geoplugin_timezone '];