php限制IP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:
<?php $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 $oBlock_ip->ip; exit('禁止访问'); } ?>
allowIP类文件,代码如下:
<?php class allowIp { function __construct($allow_ip) { if (emptyempty($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 <= $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->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); } } ?>
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