PHP Undefined Index

I have this code and it's giving me an undefined error if country is
not a variable in the URL. I've never had this problem before so it's obviously
something to do with server settings but I'd rather not change those because this is
probably done for security purposes. I've searched Google and can't find the workaround,
although I'm sure it's blindingly
obvious!

$country =
            $_GET['country'];

 if(!$country){
 $incoming = $outgoing
            = $sms = $free = "---";
 } else {
 get_rates($country);

            }

class="post-text" itemprop="text">

class="normal">Answer

you should
use the following approach:

if
            (!isset($_GET['country'])) {
 $incoming = $outgoing = $sms = $free =
            "---";
} else {

            get_rates($_GET['country']);
}