(PECL geoip >= 0.2.0)
geoip_database_info — Get GeoIP Database information
The geoip_database_info() function returns the corresponding GeoIP Database version as it is defined inside the binary file.
If this function is called without arguments, it returns the version of the GeoIP Free Country Edition.
The database type as an integer. You can use the various constants defined with this extension (ie: GEOIP_*_EDITION).
Returns the corresponding database version, or NULL on error.
Example #1 A geoip_region_by_name() example
This will output the current database version string.
<?php
print geoip_database_info(GEOIP_COUNTRY_EDITION);
?>
以上例程会输出：
GEO-106FREE 20060801 Build 1 Copyright (c) 2006 MaxMind LLC All Rights Reserved