禁止单个IP或ip段访问

    //IP禁止判断接口,返回true则为找到

    function checkIp($ip, $ipbanned)

    {

        $ipbannedFlag = false;

        if (!empty($ipbanned)) {

            foreach ($ipbanned as $data) {

                if (strpos($data, '*')) {

                    $ip_min = convert_ip("min", $data);

                    $ip_max = convert_ip("max", $data);

                    $result = ipforbidden($ip, $ip_min, $ip_max);

                    if ($result == 1) {

                        //找到

                        $ipbannedFlag = true;

                        break;

                    }

                } else {

                    if ($ip == $data) {

                        //找到

                        $ipbannedFlag = true;

                        break;

                    }

                }

            }

        }

        return $ipbannedFlag;

    }

    function convert_ip($op, $ip)

    {

        $arr_ip = explode(".", $ip);

        $arr_temp = array();

        $i = 0;

        $result = '';

        $ip_val = $op == "max" ? "255" : "1";

        foreach ($arr_ip as $key => $val) {

            $i++;

            $val = $val == "*" ? $ip_val : $val;

            $arr_temp[] = $val;

        }

        for ($i = 4 - $i; $i > 0; $i--) {

            $arr_temp[] = $ip_val;

        }

        $comma = "";

        foreach ($arr_temp as $v) {

            $result .= $comma . $v;

            $comma = ".";

        }

        return $result;

    }

    //判断IP是否被限并返回

    function ipforbidden($ip, $ip_from, $ip_to)

    {

        $from = strcmp(ip2long($ip), ip2long($ip_from));

        $to = strcmp(ip2long($ip), ip2long($ip_to));

        if ($from >= 0 && $to <= 0) {

            return 1;

        } else {

            return 0;

        }

    }

　　

    //使用方法

        $ipbanned = [

            '61.135.165.*',

            '61.135.186.*',

            '127.0.0.1',

        ];

        $user_ip = '127.0.0.1';

        $result = checkIp($user_ip, $ipbanned);

        if ($result) exit('禁止访问');