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IP地址子网掩码计算

时间：2021-07-01 10:21:17 帮助过：9人阅读

IP地址子网掩码计算，返回IP段起止范围、长度、掩码等信息。

/**
* 掩码计算器
* @author WeakSun <52132522@qq.com>
* @param string $ip IP
* @param numeric $bits 掩码
* @return array 返回结果集
*/
function netmask($ip, $bits = 24) {
$result = [
'start' => 0, //第一个IP
'end' => 0, //最后一个IP
'length' => 0, //包含的IP个数
'netmask' => (~pow(2, 32 - $bits)) + 1, //子网掩码
'networkSegment' => 0, //IP段
'bcast' => 0//广播地址
];
$result['length'] = abs($result['netmask']) - 2;
$result['networkSegment'] = ip2long($ip) & $result['netmask'];
$result['start'] = $result['networkSegment'] + 1;
$result['end'] = $result['networkSegment'] + $result['length'];
$result['bcast'] = $result['end'] + 1;
return $result;
}

list($ip, $bits) = explode('/', '192.168.1.5/25');
$tmpArr = netmask($ip, $bits);
foreach ($tmpArr as $k => &$v) {
$k != 'length' && $v = long2ip($v);
}
echo '
```
' . var_export($tmpArr, true).'
```
';

array (  'start' => '192.168.1.1',
  'end' => '192.168.1.126',
  'length' => 126,
  'netmask' => '255.255.255.128',
  'networkSegment' => '192.168.1.0',
  'bcast' => '192.168.1.127',
)

子网掩码

IP地址子网掩码计算

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