Geocoding (finding latitude/longitude for street addresses), Geotagging (tagging media with latitude/longitude coordinates), and Geolocation (finding latitude/longitude of computer with IP X-Forwarded-For). There are some options to install on linux environment:

# wget http://geolite.maxmind.com/download/geoip/database/GeoLiteCity.dat.gz
# gunzip GeoLiteCity.dat.gz
# sudo mkdir -v /usr/share/GeoIP
# sudo mv -v GeoLiteCity.dat /usr/share/GeoIP/GeoIPCity.dat


Install geoip with php5
# sudo apt-get install php5-geoip (ubuntu)

# sudo yum install php5-geoip (centOS)

# sudo pecl install geoip (with PECL)

In Windows environment we have to add extension “php_geoip.dll” with PHP

Download extension from here : http://blog.svnlabs.com/php-5.2.1_geoip-w32.zip

Copy “php_geoip.dll” to xampp “php/ext” .. add a line in php.ini
“extension=php_geoip.dll” and restart xampp

This extension will work on development system using Windows, Apache 2.2.3 and PHP 5.2.10.
We can check “geoip” with phpinfo() module is loaded.

<?php
$record = geoip_record_by_name('www.svnlabs.com');
if ($record) {
print_r($record);
}
?>

Array
(
    [country_code] => US
    [region] => CA
    [city] => Marina...
    [postal_code] =>
    [latitude] => 23.9776792798
    [longitude] => -128.435796741
    [dma_code] => 867
    [area_code] => 400
)

<?php
$result = geoip_record_by_name('78.aaa.yyy.xxx');
var_dump($result);
?>

There is alternative PHP version of the GeoIP API from MaxMind, but this solution is quite slow on servers. MaxMind uses MaxMind database to display geo locations.