通过 Composer 轻松实现 IP 地址解析：qingbing/pf-tools-ip 库的实际应用

<code>composer require qingbing/pf-tools-ip</code>

<code class="php">// 获取国家、省份、城市信息（用索引返回）
var_dump(\Tools\Ip::getInstance()->getCity()->find('118.28.1.1', 'CN'));
// 获取国家、省份、城市信息（用键值返回）
var_dump(\Tools\Ip::getInstance()->getCity()->findMap('118.28.1.1', 'CN'));
// 获取ip详细信息，免费版基本无用
var_dump(\Tools\Ip::getInstance()->getCity()->findInfo('118.28.1.1', 'CN'));</code>

<code>Array
(
    [0] => 中国
    [1] => 天津
    [2] => 天津
)
Array
(
    [country_name] => 中国
    [region_name] => 天津
    [city_name] => 天津
)
IpSupports\CityInfo Object
(
    [country_name] => 中国
    [region_name] => 天津
    [city_name] => 天津
    [owner_domain] => 
    [isp_domain] => 
    [latitude] => 
    [longitude] => 
    [timezone] => 
    [utc_offset] => 
    [china_admin_code] => 
    [idd_code] => 
    [country_code] => 
    [continent_code] => 
    [idc] => 
    [base_station] => 
    [country_code3] => 
    [european_union] => 
    [currency_code] => 
    [currency_name] => 
    [anycast] => 
)</code>