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
PHP实例代码如下:
-
-
-
-
-
-
-
$ip = $_SERVER['REMOTE_ADDR'];
-
$ipArray = preg_replace("#rn?|n#","",file('ip.txt'));
-
foreach ($ipArray as $ipTest) {
-
if (substr_count($ip, $ipTest) != "0") {
-
echo "ok";
-
die();
-
}
-
}
上面大家可以使用代码来骗过了,下面代码进行升级:
-
<?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;
-
-
$Ip = $this->get_client_ip();
-
$Ip = trim($Ip);
-
-
if ($iptable) {
-
foreach($iptable as $value) {
-
if (preg_match("{$value}",$Ip)) {
-
$IsJoined = false;
-
break;
-
}
-
}
-
}
-
-
if( !$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:
$oBlock_ip = new block_ip();
$oBlock_ip->checkIP();
(责任编辑:最模板) |