从PHP中获取Ipv6 CIDR的IPv6地址数 [英] Getting number of IPv6 addresses from Ipv6 CIDR in PHP

问题描述

有没有办法从Ipv6 CIDR获取IPv6地址数量？

例如：CIDR：2403：3E00： ：/ 32
=>
需要得到IPv6地址的个数：79228162514264337593543950336

解决方案

  2 ^（128-32）= 2 ^ 96 = 79228162514264337593543950336 
  

是错误的，仍然需要

  79228162514264337593543950336  -  1 = 79228162514264337593543950335主机
  

PS。抱歉，由于声誉，我无法评论Joachim的答案，这就是我对stackoverflow不太感兴趣的原因。

Is there a way to get the number of IPv6 addresses from a Ipv6 CIDR?

for example: CIDR: 2403:3E00::/32 => need get number of ipv6 addresses: 79228162514264337593543950336

解决方案

2^(128-32) = 2^96 = 79228162514264337593543950336 

is wrong, you still need to

79228162514264337593543950336 - 1 = 79228162514264337593543950335 hosts

PS. sorry I could not comment it to the answer of Joachim because of reputation, this is why I am not much interested in stackoverflow.

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