Caught fatal error: Call to undefined function geoip_db_avail()?

The code is:

if (!geoip_db_avail(GEOIP_COUNTRY_EDITION)) { //do this } 

and it is throwing a:

Caught fatal error: Call to undefined function geoip_db_avail() 

in one of my applications.

On a test on another site on the same server using:

$country_name = apache_note("GEOIP_COUNTRY_NAME"); print "What: " . $country_name; if (geoip_db_avail(GEOIP_COUNTRY_EDITION)) { print "NO!"; } else { print "YE"; } 

It does not show the error but all the page prints is:

What: Pakistan 

It does not print Ye or NO!