PHP IP及IP段进行访问限制的代码

本来是写了几个函数，IP黑名单是记到库里的，为了方便理解，改成了一个class把IP黑名单写了出来。

192.168.1.1 单个IP192.168.1.* 这样代理 192.168.1.1-192.168.1-255192.158.1.2-20 这样是代表192.158.1.2-192.158.1.20也可以这样写 192.168.1.[1|2|3]嘿嘿～一个方法不知道想法是否周全，拿出来大家讨论使用以下是引用片段：$oBlock_ip = new block_ip();$oBlock_ip->checkIP();以下是引用片段：

<?phpclass 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;}}}//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);}}?>