如何检查IP地址在PHP的两个IP范围内？ [英] How to check an IP address is within a range of two IPs in PHP?

问题描述

我有一个IP地址，我有另外两个IP地址，它们共同创建了一个IP范围。我想检查第一个IP地址是否在此范围内。我怎样才能在PHP中找到它？

I have an IP address and I'm given two other IP addresses which together creates an IP range. I want to check if the first IP address is within this range. How can i find that out in PHP?

推荐答案

使用 ip2long（） 很容易将地址转换为数字。在此之后，您只需检查数字是否在范围内：

With ip2long() it's easy to convert your addresses to numbers. After this, you just have to check if the number is in range:

if ($ip <= $high_ip && $low_ip <= $ip) {
  echo "in range";
}

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