【php】获取服务器公网ip,内网ip「建议收藏」

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<?php
/**
 * Created by PhpStorm.
 * User: zhudechao
 * Date: 2019/3/20
 * Time: 下午5:27
 */

namespace zhdcp\ip;


class Ip
{
    public function get_outer()
    {
        $ch = curl_init('http://2019.ip138.com/ic.asp');
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        $a  = curl_exec($ch);
        preg_match('/\[(.*)\]/', $a, $ip);
        print_r($ip[1]);
        die();
    }

    function get_inter()
    {
        $onlineip = '';
        if (getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), 'unknown')) {
            $onlineip = getenv('HTTP_CLIENT_IP');
        } elseif (getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), 'unknown')) {
            $onlineip = getenv('HTTP_X_FORWARDED_FOR');
        } elseif (getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), 'unknown')) {
            $onlineip = getenv('REMOTE_ADDR');
        } elseif (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], 'unknown')) {
            $onlineip = $_SERVER['REMOTE_ADDR'];
        }
        return $onlineip;
    }

    public function get_client_ip()
    {
        if (getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), 'unknown')) {
            $ip = getenv('HTTP_CLIENT_IP');
        } elseif (getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), 'unknown')) {
            $ip = getenv('HTTP_X_FORWARDED_FOR');
        } elseif (getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), 'unknown')) {
            $ip = getenv('REMOTE_ADDR');
        } elseif (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], 'unknown')) {
            $ip = $_SERVER['REMOTE_ADDR'];
        }
        return preg_match('/[\d\.]{7,15}/', $ip, $matches) ? $matches [0] : '';
    }
}