How do I install the GeoIP

Hello;

I am using Piwik on my server and i was thinking if its possible to install the GEOIP extension so as to get the correct details of my web visitors.... my piwik installation uses PHP7

Here are the options

GeoIP (PECL) http://piwik.org/faq/how-to/#faq_164
GeoIP (HTTP Server Module) http://piwik.org/faq/how-to/#faq_165 (apache) http://piwik.org/faq/how-to/#faq_166 (nginx)

I already have GeoIP (Php) installed with maxmind database....

How do I install the GeoIP