See codes in the standard ISO 3166-1.
http://en.wikipedia.org/wiki/ISO_3166-1
geoip_continent_code_by_name
(PECL geoip >= 1.0.3)
geoip_continent_code_by_name — Get the two letter continent code
Descrição
string geoip_continent_code_by_name
( string $hostname
)
The geoip_continent_code_by_name() function will return the two letter continent code corresponding to a hostname or an IP address.
Parâmetros
- hostname
-
The hostname or IP address whose location is to be looked-up.
Valor Retornado
Returns the two letter continent code on success, or FALSE if the address cannot be found in the database.
Exemplos
Exemplo #1 A geoip_continent_code_by_name() example
This will print where the host example.com is located.
<?php
$continent = geoip_continent_code_by_name('www.example.com');
if ($continent) {
echo 'This host is located in: ' . $continent;
}
?>
O exemplo acima irá imprimir:
This host is located in: NA
User Contributed Notes
geoip_continent_code_by_name
geoip_continent_code_by_name
lord.rojer [at] gmail.com
31-Jul-2011 11:53
31-Jul-2011 11:53
fabien dot snauwaert at gmail dot com
18-Jan-2010 02:40
18-Jan-2010 02:40
The return values are not really documented anywhere in a straight-forward fashion.
The best I could find is a list of all countries and their associated continent codes, here: http://www.maxmind.com/app/country_continent
Leaving us with 7 possible continents:
AS for Asia
EU for Europe
SA for South America
AF for Africa
AN for µAntartica
OC for Oceania
NA for North America
As mentioned above, if the host/IP is not found in the database, the function returns FALSE.

GeoIP Funções