php代码

//是否国内ip
function isChinaIP($ip) {
    saveLog("---isChinaIP----------");
    $url = "https://searchplugin.csdn.net/api/v1/ip/get?ip=".$ip;
    // 发送HTTP请求
    $response = file_get_contents($url);
    $utf8String = mb_convert_encoding($response, "UTF-8", "auto");
    saveLog("--isChinaIP---".$utf8String);
    // 解析JSON响应
    $data = json_decode($utf8String, true);
    // 判断所属地区是否为中国
    saveLog("isChinaIP address ".$data['data']['address']);
    if ($data && isset($data['data']['address']) && (strpos($data['data']['address'],"中国")!==false) ) {
        saveLog("isChinaIP true");
        return true;
    } else {
        return false;
    }
}

返回值

{"code":200,"msg":"success","data":{"address":"中国 重庆 重庆 电信","ip":"183.69.129.158"}}'

参考：https://blog.csdn.net/m0_53025912/article/details/132258243