Is there a superglobal reference to the user's country or is using the IP against a database of IP to Country lookups the best way to go?
i wish there were such thing as $_SERVER['HTTP_COUNTRY']
... maybe in php99 ? ;)
for the time being, http://php.net/manual/en/book.geoip.php is your best bet
however, if you're only interested in user's language, there is $_SERVER["HTTP_ACCEPT_LANGUAGE"]
Here are some more options for ip to country lookups
Here an example of how to get country code from the IP. It's not a PHP superglobal, but it's not too had to implement either.
$country = strtoupper(file_get_contents("http://geoip.wtanaka.com/cc/{$_SERVER['REMOTE_ADDR']}"));
来源:https://stackoverflow.com/questions/1736024/php-accessing-the-users-country-locale