How to calculate IP address mask in php

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";

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

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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