php限制IP和IP段的代码(白名单)

实现的原理比较简单只要获取用户IP然后再在我们黑名单库中验证一下当前IP是不是存在即可进行过滤操作了，具体例子如下。

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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	复制代码
$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 '您的IP为:';   echo $oBlock_ip->ip;   exit('禁止访问'); }

allowIP类文件

代码如下

复制代码

class allowIp {       function __construct($allow_ip){         if (empty($allow_ip)) {           return false;         }         $this->allow_ip = $allow_ip;         $this->ip = '';       }       private function makePregIP($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                         $preg .=$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['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown"))             $ip = $_SERVER['REMOTE_ADDR'];         else             $ip = "unknown";         $this->ip = $ip;         return($ip);    } }