Nerrsoft

<?php 
/* 
* Leon 
* http://nerrsoft.com * leon@nerrsoft.com 
* 2010-08-11 
*/ 
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}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|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 = $ip->getIpInfo('10.229.8.10/22'); 
print_r($result); 
?>