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(PECL geoip >= 1.0.3)
geoip_continent_code_by_name — Get the two letter continent code
$hostname 
   )The geoip_continent_code_by_name() function will return the two letter continent code corresponding to a hostname or an IP address.
hostname The hostname or IP address whose location is to be looked-up.
   Returns the two letter continent code on success, or  FALSE  if the
   address cannot be found in the database.
  
| Code | Continent name | 
|---|---|
| AF | Africa | 
| AN | Antarctica | 
| AS | Asia | 
| EU | Europe | 
| NA | North america | 
| OC | Oceania | 
| SA | South america | 
Example #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 ;
}
 ?>   以上例程会输出:
This host is located in: NA