GeoIP 函数
PHP Manual

geoip_db_avail

(PECL geoip >= 1.0.1)

geoip_db_availDetermine if GeoIP Database is available

说明

bool geoip_db_avail ( int $database )

The geoip_db_avail() function returns if the corresponding GeoIP Database is available and can be opened on disk.

It does not indicate if the file is a proper database, only if it is readable.

参数

database

The database type as an integer. You can use the various constants defined with this extension (ie: GEOIP_*_EDITION).

返回值

Returns TRUE is database exists, FALSE if not found, or NULL on error.

范例

Example #1 A geoip_db_avail() example

This will output the current database version string.

<?php

if (geoip_db_avail(GEOIP_COUNTRY_EDITION))
    print 
geoip_database_info(GEOIP_COUNTRY_EDITION);
?>

以上例程会输出:

GEO-106FREE 20080801 Build 1 Copyright (c) 2006 MaxMind LLC All Rights Reserved


GeoIP 函数
PHP Manual