学校的新闻系统要求有些新闻只开放校内ip浏览，于是重写了一个代码来实现此功能，实现后的结果是，只要把允许访问的ip列入ip.txt这个文件中即可，同时支持c类ip，例如：
ip.txt
192.168
211.67.188
211.67.191.25
代码如下：
| 代码如下 |
复制代码 |
|
/*
* ip地址黑名单、白名单
* 判断访客地址的ip是否在ip.txt中，支持c类ip
* By
xhat
*/
$ip = $_SERVER[‘REMOTE_ADDR‘];
$ipArray =
preg_replace("#rn?|n#","",file(‘ip.txt‘));
foreach ($ipArray as $ipTest) {
if (substr_count($ip, $ipTest) != "0") {
echo "ok";
//执行相关命令
die();
}
}
?> |
上面大家可以使用代码来骗过了，下面代码进行升级
| 代码如下 |
复制代码 |
|
<?php
class block_ip {
var $Block_ip =
array("192.168.1.1","210.10.2.1-20","222.34.4.*");
function
__construct(){
}
function __destruct(){
}
private function
makePregIP($str){
if (strstr($str,"-")) {
$aIP = explode(".",$str);
foreach ($aIP as $k=>$v) {
if (!strstr($v,"-")) {
$preg_limit .= makePregIP($v);
} 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->Block_ip) {
foreach ($this->Block_ip as $k=>$v) {
$ipaddres = $this->makePregIP($v->start_ip);
$ip =
str_ireplace(".",".",$ipaddres);
$ip =
str_replace("*","[0-9]{1,3}",$ip);
$ipaddres = "/".$ip."/";
$ip_list[] = $ipaddres;
}
}
return $ip_list;
}
public function checkIP() {
$iptable = $this->getAllBlockIP();
$IsJoined = true;
//取得用户ip
$Ip = $this->get_client_ip();
$Ip = trim($Ip);
//剔除黑名单中的IP区段
if ($iptable) {
foreach($iptable as $value) {
if (preg_match("{$value}",$Ip)) {
$IsJoined = false;
break;
}
}
}
// www.111cn.net如果在ip黑名单中就执行如下操作
if(
!$IsJoined ){
echo "IP Error";
exit;
}
}
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[‘REMOTE_ADDR‘])
&& $_SERVER[‘REMOTE_ADDR‘] &&
strcasecmp($_SERVER[‘REMOTE_ADDR‘], "unknown"))
$ip =
$_SERVER[‘REMOTE_ADDR‘];
else
$ip = "unknown";
return($ip);
}
}
?> |
引用片段：
| 代码如下 |
复制代码 |
|
$oBlock_ip = new block_ip();
$oBlock_ip->checkIP(); |
