PHP获取指定的IP网段信息

<?php
/**
* PHP获取给定IP网段信息
* by www.jb200.com
*/
    class ipInfo{
       
//根据给定的IP字串获取IP信息
        public function getIpInfo($ipStr){
            if(!$this->valid($ipStr)){
                return false;
            }
            $ipArr = explode('/', $ipStr);
           
//information
            $info['ipStr'] = $ipStr;
            $info['bin']['mask'] = $this->getSubnetMask($ipArr[1]);
            $info['ip']['mask'] = $this->bin2ip($info['bin']['mask']);
            $info['long']['mask'] = ip2long($info['ip']['mask']);
            $info['bin']['net'] = $this->ip2bin($ipArr[0]) & $info['bin']['mask'];
            $info['ip']['net'] = $this->bin2ip($info['bin']['net']);
            $info['long']['net'] = ip2long($info['ip']['net']);
            $info['ip']['begin'] = long2ip($info['long']['net']+1);
            $info['bin']['begin'] = $this->ip2bin($ipArr[0]);
            $info['long']['begin'] = ip2long($info['ip']['begin']);
            $info['ip']['end'] = long2ip(abs($info['long']['mask'])+$info['long']['begin']-3);
            $info['bin']['end'] = $this->ip2bin($info['ip']['end']);
            $info['long']['end'] = ip2long($info['ip']['end']);
            $info['ip']['broacast'] = long2ip($info['long']['end']+1);
            $info['bin']['broacast'] = $this->ip2bin($info['ip']['broacast']);
            $info['long']['broacast'] = ip2long($info['ip']['broacast']);
            return $info;
        }
       
//验证IP字串格式有效性 10.0.0.1/24
        private function valid($ipStr){
            if(preg_match("/^(d{1,2}|1dd|2[0-4]d|25[0-5]).(d{1,2}|1dd|2[0-4]d|25[0-5]).(d{1,2}|1dd|2[0-4]d|25[0-5]).(d{1,2}|1dd|2[0-4]d|25[0-5])/d{1,2}$/", $ipStr)){
                return true;
            }else{
                return false;
            }
        }
       
//获取二进制
        private function get_bin($number){
            return str_pad(decbin($number),8,'0',STR_PAD_LEFT);
            return decbin($number);
        }
       
//IP地址转二进制
        private function ip2bin($ip){
            $ip_octets = split(".", $ip);
            unset($bin_sn);
            foreach($ip_octets as $val){
                $bin_sn[] = $this->get_bin($val);
            }
            return join(".", $bin_sn);
        }
       
//二进制转IP地址
        private function bin2ip($ip){
            $ip_octets = split(".", $ip);
            unset($bin_sn);
            foreach($ip_octets as $val){
                $bin_sn[] = bindec($val);
            }
            return join(".", $bin_sn);
        }
       
//获取子网掩码
        private function getSubnetMask($mask){
            for($i=1; $i<=32; $i++){
                if($i<=$mask){
                    $maskStr .= '1';
                }else{
                    $maskStr .= '0';
                }
                if($i%8==0){
                    $maskStr .= '.';
                }
            }
            $maskStr = substr($maskStr, 0, -1);
            return $maskStr;
        }
    }
   
//example
    $ip = new ipInfo();
    $result = $ip->getIpInfo('121.207.247.202/26');
    print_r($result);
?>