determine which country it is

<script>
    // auto fill form values
    jQuery('.pef-title').val(jQuery('.product-title-content').text());
    jQuery('.pef-url').val(window.location.href);
    
    // auto fill form values
    jQuery('#productname').val("<?php the_title(); ?>");
    jQuery('#pageurl').val(window.location.href);
    // jQuery('#userip').val("<?php// echo $_SERVER['REMOTE_ADDR']; ?>");
    //var IpAddress = $_SERVER['REMOTE_ADDR'];

    <?php    // ip = 8.8.8.8

    function ip_details($IPaddress) 
    {
        $json       = file_get_contents("http://ipinfo.io/{$IPaddress}");
        $details    = json_decode($json);
        return $details;
    }

    $ip =  $_SERVER['REMOTE_ADDR'];

        $details    =   ip_details("$ip");
        $country_names = json_decode(file_get_contents("http://country.io/names.json"), true);
        $country = $country_names[$details->country];
    ?>
    var country = "<?php echo $country;  ?>";
    console.log(country);

    jQuery('input[name=CountryName]').val(country);
</script>