php限制IP和IP段的代码

php限制IP段代码是我在网上搜相关解决方法时搜到的,这个类的makePregIP函数逻辑有点问题,我修改了下可以使用了,这个类得功能是允许白名单中的IP地址访问,如果要实现限制黑名单中的IP地址访问,简单修改下checkIP函数中的代码逻辑就可以了.

使用方法,代码如下:

<?php
$allow_ip = array(
    "192.168.1.1",
    "210.10.2.1-20",
    "222.34.4.*",
    "127.0.0.1"
);
$oBlock_ip = new allowIp($allow_ip);
if (!$oBlock_ip->checkIP()) {
    echo &#39;您的IP为:&#39;;
    echo $oBlock_ip->ip;
    exit(&#39;禁止访问&#39;);
}
?>

allowIP类文件,代码如下:

<?php
class allowIp {
    function __construct($allow_ip) {
        if (emptyempty($allow_ip)) {
            return false;
        }
        $this->allow_ip = $allow_ip;
        $this->ip = &#39;&#39;;
    }
    private function makePregIP($str) {
        if (strstr($str, "-")) {
            $aIP = explode(".", $str);
            foreach ($aIP as $k => $v) {
                if (!strstr($v, "-")) {
                    $preg_limit.= $this->makePregIP($v);
                    $preg_limit.= ".";
                } else {
                    $aipNum = explode("-", $v);
                    for ($i = $aipNum[0]; $i <= $aipNum[1]; $i++) {
                        $preg.= $preg ? "|" . $i : "[" . $i;
                    }
                    $preg_limit.= strrpos($preg_limit, ".", 1) == (strlen($preg_limit) - 1) ? $preg . "]" : "." . $preg . "]";
                }
            }
        } else {
            $preg_limit = $str;
        }
        return $preg_limit;
    }
    private function getAllBlockIP() {
        if ($this->allow_ip) {
            $i = 1;
            foreach ($this->allow_ip as $k => $v) {
                $ipaddres = $this->makePregIP($v);
                $ip = str_ireplace(".", ".", $ipaddres);
                $ip = str_replace("*", "[0-9]{1,3}", $ip);
                $ipaddres = "/" . $ip . "/";
                $ip_list[] = $ipaddres;
                $i++;
            }
        }
        return $ip_list;
    }
    public function checkIP() {
        $iptable = $this->getAllBlockIP();
        $IsJoined = false;
        //取得用户ip
        $Ip = $this->get_client_ip();
        $Ip = trim($Ip);
        //在白名单中
        if ($iptable) {
            foreach ($iptable as $value) {
                if (preg_match("{$value}", $Ip)) {
                    $IsJoined = true;
                    break;
                }
            }
        }
        //不在白名单中
        if (!$IsJoined) {
            return false;
        }
        return true;
    }
    private function get_client_ip() {
        if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP") , "unknown")) $ip = getenv("HTTP_CLIENT_IP");
        else if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR") , "unknown")) $ip = getenv("HTTP_X_FORWARDED_FOR");
        else if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR") , "unknown")) $ip = getenv("REMOTE_ADDR");
        else if (isset($_SERVER[&#39;REMOTE_ADDR&#39;]) && $_SERVER[&#39;REMOTE_ADDR&#39;] && strcasecmp($_SERVER[&#39;REMOTE_ADDR&#39;], "unknown")) $ip = $_SERVER[&#39;REMOTE_ADDR&#39;];
        else $ip = "unknown";
        $this->ip = $ip;
        return ($ip);
    }
}
?>

教程地址：

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