You must have to enabled file get contents on your server :

<?php
/*Get user ip address*/
$ip_address=$_SERVER[‘REMOTE_ADDR’];

/*Get user ip address details with geoplugin.net*/
$geopluginURL=’http://www.geoplugin.net/php.gp?ip=’.$ip_address;
$addrDetailsArr = unserialize(file_get_contents($geopluginURL));

/*Get Country name by return array*/
$country = $addrDetailsArr[‘geoplugin_countryName’];

/*Comment out these line to see all the posible details*/
/*echo ‘<pre>’;
print_r($addrDetailsArr);
die();*/

if($country==’Bangladesh’)
{
echo
“<script type=\”text/javascript\”>”.
“window.alert(‘Your country Bangladesh.’);”.
“</script>”;
}

else {

echo ‘ok’;
}

?>