geo isp function

[kei_ki7]

PHP: geoip_isp_by_name - Manual

i want to get the function of geoip_isp_by_name ( string $hostname )

i dont know how

do i need to install first this?

PHP: Installing/Configuring - Manual

if yes, can i do this for shared host?

[modoran]

There is no way you could install geoip php extension without root access.