Calculating subnet masks with PHP

output.txt

string(14) "--- Binary ---"
string(44) "Base        11000000101010000000000100001110"
string(44) "Mask        11111111111111111111111000000000"
string(44) "BaseNet     11000000101010000000000000000000"
string(44) "Incrementer 00000000000000000000001000000000"
string(44) "Final       11000000101010000000001000000000"
string(10) "--- IP ---"
string(24) "Base        192.168.1.14"
string(25) "Mask        255.255.254.0"
string(23) "BaseNet     192.168.0.0"
string(19) "Incrementer 0.0.2.0"
string(23) "Final       192.168.2.0"

php-ip-subnet-math.php

<?php
$base = ip2long("192.168.1.14");
$mask = ip2long("255.255.254.0");
$baseNet = $base & $mask;
$incrementer = ip2long("255.255.255.255") - $mask + 1;
var_dump("--- Binary ---");
var_dump("Base        ".str_pad(base_convert($base, 10, 2), 32, "0", STR_PAD_LEFT));
var_dump("Mask        ".str_pad(base_convert($mask, 10, 2), 32, "0", STR_PAD_LEFT));
var_dump("BaseNet     ".str_pad(base_convert($baseNet, 10, 2), 32, "0", STR_PAD_LEFT));
var_dump("Incrementer ".str_pad(base_convert($incrementer, 10, 2), 32, "0", STR_PAD_LEFT));
var_dump("Final       ".str_pad(base_convert($incrementer + $baseNet, 10, 2), 32, "0", STR_PAD_LEFT));
var_dump("--- IP ---");
var_dump("Base        ".long2ip($base));
var_dump("Mask        ".long2ip($mask));
var_dump("BaseNet     ".long2ip($baseNet));
var_dump("Incrementer ".long2ip($incrementer));
var_dump("Final       ".long2ip($incrementer + $baseNet));