注册
登录
| 关键词： nbsp address Return ip2long netbits 子网 netmask function network long2ip |
ip2long IP地址转换成整型。long2ip 整型数据转换成IP。 子网掩码转换成掩码长度方式：$slash_notation = strlen(preg_replace("/0/", "", decbin(ip2long($subnet_mask))));$bits=strpos(decbin(ip2long($mask)),"0"); 子网掩码位长转换成子网掩码形式：$mask = 0xffffffff << (32 - $mask);$mask = pow(2,32)-pow(2,(32-$mask)); 判断两个地址是否在一个子网内：<?phpfunction matchCIDR($addr, $cidr) { list($ip, $mask) = explode('/', $cidr); return (ip2long($addr) >> (32 - $mask) == ip2long($ip) >> (32 - mask));}?> 一个IPv4的类：<?php //--------------// IPv4 classclass ipv4{ var $address; var $netbits; //-------------- // Create new class function ipv4($address,$netbits) { $this->address = $address; $this->netbits = $netbits; } //-------------- // Return the IP address function address() { return ($this->address); } //-------------- // Return the netbits function netbits() { return ($this->netbits); } //-------------- // Return the netmask function netmask() { return (long2ip(ip2long("255.255.255.255") << (32-$this->netbits))); } //-------------- // Return the network that the address sits in function network() { return (long2ip((ip2long($this->address)) & (ip2long($this->netmask())))); } //-------------- // Return the broadcast that the address sits in function broadcast() { return (long2ip(ip2long($this->network()) | (~(ip2long($this->netmask()))))); } //-------------- // Return the inverse mask of the netmask function inverse() { return (long2ip(~(ip2long("255.255.255.255") << (32-$this->netbits)))); } } $ip = new ipv4("192.168.2.1",24); print "Address: $ip->address()\n"; print "Netbits: $ip->netbits()\n"; print "Netmask: $ip->netmask()\n"; print "Inverse: $ip->inverse()\n"; print "Network: $ip->network()\n"; print "Broadcast: $ip->broadcast()\n";?> 这个做法比较有创意：For those poor little people using PHP 3, here's an ip2long:<?phpif (!function_exists("ip2long")) { function ip2long($ip) { $ex = explode(".", $ip); if (count($ex)!=4) return -1; list($a, $b, $c, $d) = $ex; $a = $a*16777216; $b = $b*65536; $c = $c*256; return $a+$b+$c+$d; }}?> #!/usr/local/bin/php<? $ip_addr = "172.14.1.57"; $subnet_mask = "255.255.255.0"; $ip = ip2long($ip_addr); $nm = ip2long($subnet_mask); $nw = ($ip & $nm); $bc = $nw | (~$nm); echo "IP Address: " . long2ip($ip) . "\n"; echo "Subnet Mask: " . long2ip($nm) . "\n"; echo "Network Address: " . long2ip($nw) . "\n"; echo "Broadcast Address: " . long2ip($bc) . "\n"; echo "Number of Hosts: " . ($bc - $nw - 1) . "\n"; echo "Host Range: " . long2ip($nw + 1) . " -> " . long2ip($bc - 1) . "\n";?> Produces the output: IP Address: 172.14.1.57Subnet Mask: 255.255.255.0Network Address: 172.14.1.0Broadcast Address: 172.14.1.255Number of Hosts: 254Host Range: 172.14.1.1 -> 172.14.1.254 |
|
声明：文章版权归原作者所有 部分文章转自互联网 如有侵权请联系
[邮箱地址] 删除
|
