How to calculate IP address mask in php

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Release: 2023-03-18 21:50:02
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This article mainly introduces the method of IP address masking operation in PHP, involving PHP string and network operation related skills. Friends in need can refer to it. I hope to be helpful.

The details are as follows:

ip analysis:

function ip_parse($ip_str) {
 $mark_len = 32;
 if (strpos($ip_str, "/") > 0) {
  list($ip_str, $mark_len) = explode("/", $ip_str);
 }
 $ip = ip2long($ip_str);
 $mark = 0xFFFFFFFF << (32 - $mark_len) & 0xFFFFFFFF;
 $ip_start = $ip & $mark;
 $ip_end = $ip | (~$mark) & 0xFFFFFFFF;
 return array($ip, $mark, $ip_start, $ip_end);
}
//演示:
list($ip, $mark, $ip_start, $ip_end) = ip_parse("192.168.1.12/24");
echo "IP地址 : ", long2ip($ip), "\n";
echo "子网掩码: ", long2ip($mark), "\n";
echo "IP段开始: ", long2ip($ip_start), "\n";
echo "IP段结束: ", long2ip($ip_end), "\n";
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Result:

IP地址 : 192.168.1.12
子网掩码: 255.255.255.0
IP段开始: 192.168.1.0
IP段结束: 192.168.1.255
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Whether ip is in the ip segment :

function ip_in($ip, $ip_str) {
 $mark_len = 32;
 if (strpos($ip_str, "/") > 0) {
  list($ip_str, $mark_len) = explode("/", $ip_str);
 }
 $right_len = 32 - $mark_len;
 return ip2long($ip) >> $right_len == ip2long($ip_str) >> $right_len;
}
//演示:
var_dump(ip_in("192.168.1.1", "192.168.1.0/24"));
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