這篇文章主要介紹了php判斷ip黑名單程序代碼實例,需要的朋友可以參考下
學校的新聞系統要求有些新聞只開放校內ip浏覽，於是重寫了一個代碼來實現此功能，實現後的結果是，只要把允許訪問的ip列入ip.txt這個文件中即可，同時支持c類ip，例如： ip.txt 192.168 211.67.188 211.67.191.25 代碼如下： 代碼如下: /* * ip地址黑名單、白名單 * 判斷訪客地址的ip是否在ip.txt中，支持c類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"; //執行相關命令 die(); } } ?> 上面大家可以使用代碼來騙過了，下面代碼進行升級 代碼如下: <?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; //取得用戶ip $Ip = $this->get_client_ip(); $Ip = trim($Ip); //剔除黑名單中的IP區段 if ($iptable) { foreach($iptable as $value) { if (preg_match("{$value}",$Ip)) { $IsJoined = false; break; } } } // 如果在ip黑名單中就執行如下操作 if( !$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： 代碼如下: $oBlock_ip = new block_ip(); $oBlock_ip->checkIP();
