IP地址子网掩码计算,返回IP段起止范围、长度、掩码等信息。 1. [代码] 功能函数 /** * 掩码计算器 * @author WeakSun 52132522@qq.com * @param string $ip IP * @param numeric $bits 掩码 * @return array 返回结
1. [代码]功能函数
/** * 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 $result; }
2. [代码]功能测试
list($ip, $bits) = explode('/', '192.168.1.5/25'); $tmpArr = netmask($ip, $bits); foreach ($tmpArr as $k => &$v) { $k != 'length' && $v = long2ip($v); } echo '<pre>' . var_export($tmpArr, true).'</pre>';
3. [代码]执行结果
<pre>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', )</pre>