php获取客户端的ip和地区

实例

               $ip = 'unknown';
        $unknown = 'unknown';

        if (isset($_SERVER['HTTP_X_FORWARDED_FOR']) && $_SERVER['HTTP_X_FORWARDED_FOR'] && strcasecmp($_SERVER['HTTP_X_FORWARDED_FOR'], $unknown)) {
            // 使用透明代理、欺骗性代理的情况
            $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
        } elseif (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], $unknown)) {
            // 没有代理、使用普通匿名代理和高匿代理的情况
            $ip = $_SERVER['REMOTE_ADDR'];
        }
        // 处理多层代理的情况
        if (strpos($ip, ',') !== false) {
            // 输出第一个IP
            $ip = reset(explode(',', $ip));
        }

        $content = file_get_contents("http://api.map.baidu.com/location/ip?ak=2TGbi6zzFm5rjYKqPPomh9GBwcgLW5sS&ip={$ip}&coor=bd09ll");
        $json = json_decode($content);
        $address = $json->content->address_detail;
        $return['province'] = $address->province;
        $return['city'] = $address->city;
        pr($return);
        pr($json);