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
- * @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).' Salin selepas log masuk
array ( Salin selepas log masuk - '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',
- )
|
Antivirus telefon mudah alih Apple
Tutorial membeli dan menjual Bitcoin di Huobi.com
Apakah maksud memformat telefon mudah alih?
Apakah perpustakaan kecerdasan buatan python?
penyelesaian pengecualian mysql
Apakah format m4a?
Ringkasan pengetahuan asas java
Penyelesaian laporan ralat fail sql import MySQL
![[Web front-end] Permulaan pantas Node.js](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
