Question

我需要使用PHP通过代理获取用户的IP地址... 有什么建议吗？

Answer 1

通常，代理会添加您可以通过服务器变量X-Forwarded-For

在PHP中检查的特定标头$_SERVER['HTTP_X_FORWARDED_FOR']

Answer 2

这很难做到，并非所有代理都能提供用户的真实IP。我写了这个函数之前尝试找到用户最可能的IP：

function get_ip_address() {

    if (ereg("([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})",$_SERVER['HTTP_CLIENT_IP']))
        return $_SERVER['HTTP_CLIENT_IP'];
    elseif (ereg("([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})",$_SERVER['HTTP_COMING_FROM']))
        return $_SERVER['HTTP_COMING_FROM'];
    elseif (ereg("([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})",$_SERVER['HTTP_X_COMING_FROM']))
        return $_SERVER['HTTP_X_COMING_FROM'];
    elseif (ereg("([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})",$_SERVER['HTTP_FORWARDED']))
        return $_SERVER['HTTP_FORWARDED'];
    elseif (ereg("([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})",$_SERVER['HTTP_X_FORWARDED']))
        return $_SERVER['HTTP_X_FORWARDED'];
    elseif (ereg("([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})",$_SERVER['HTTP_FORWARDED_FOR']))
        return $_SERVER['HTTP_FORWARDED_FOR'];
    elseif (ereg("([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})",$_SERVER['HTTP_X_FORWARDED_FOR']))
        return $_SERVER['HTTP_X_FORWARDED_FOR'];
    else return $_SERVER['REMOTE_ADDR'];

}

如果您只是在数据库中存储IP，那么该函数只返回1个IP，但我有一个类似的函数，它提供了基于文本的响应，并找到了所有可能的IP。

function get_txt_ip_address() {

    $return = '';

    if (ereg("([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})",$_SERVER['HTTP_CLIENT_IP']))
        $return .= $_SERVER['HTTP_CLIENT_IP']." (client) / ";
    if (ereg("([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})",$_SERVER['HTTP_COMING_FROM']))
        $return .= $_SERVER['HTTP_COMING_FROM']." (cf) / ";
    if (ereg("([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})",$_SERVER['HTTP_X_COMING_FROM']))
        $return .= $_SERVER['HTTP_X_COMING_FROM']." (xcf) / ";
    if (ereg("([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})",$_SERVER['HTTP_FORWARDED']))
        $return .= $_SERVER['HTTP_FORWARDED']." (fw) / ";
    if (ereg("([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})",$_SERVER['HTTP_X_FORWARDED']))
        $return .= $_SERVER['HTTP_X_FORWARDED']." (xfw) / ";
    if (ereg("([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})",$_SERVER['HTTP_FORWARDED_FOR']))
        $return .= $_SERVER['HTTP_FORWARDED_FOR']." (fwf) / ";
    if (ereg("([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})",$_SERVER['HTTP_X_FORWARDED_FOR']))
        $return .= $_SERVER['HTTP_X_FORWARDED_FOR']." (xfwf) / ";

    $return .= $_SERVER['REMOTE_ADDR']." (ra) / ";
    $return .= gethostbyaddr($_SERVER['REMOTE_ADDR']);

    return $return;

}

我需要获取IP地址

2 个答案: