使用GeoIP获取IP区域信息

<?php

    //计时开始
    function utime() {
        $time = explode( " ", microtime() );
        $usec = (double)$time[0];
        $sec = (double)$time[1];
        return $usec + $sec;
    }
    $startTimes = utime();
 
    // include the php script
    // wget -c http://geolite.maxmind.com/download/geoip/database/GeoLiteCountry/GeoIP.dat.gz
    // gunzip GeoIP.dat.gz
    include("geoip.inc");
 
    // open the geoip database
    $gi = geoip_open("GeoIP.dat",GEOIP_STANDARD);
 
    // 获取国家代码
    $country_code = geoip_country_code_by_addr($gi, $_SERVER['REMOTE_ADDR']);
    echo "Your country code is: <strong>$country_code</strong> <br />";
 
    // 获取国家名称
    $country_name = geoip_country_name_by_addr($gi, $_SERVER['REMOTE_ADDR']);
    echo "Your country name is: <strong>$country_name</strong> <br />";
 
    // close the database
    geoip_close($gi);
 
    //运行结束时间
    $endTimes = utime();
    $runTimes = sprintf( '%0.4f', ( $endTimes - $startTimes ) );
    echo "Processed in " . $runTimes . "second.";
?>

可实现piwik的地图区域展示

参考：http://piwik.org/docs/visitors-map/