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Added README and changed binary to dotted binary

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Jack-Benny Persson 2014-06-01 16:12:48 +02:00
parent 4105721a08
commit 982cfacee5
2 changed files with 31 additions and 3 deletions
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24
README.md Normal file
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@ -0,0 +1,24 @@
# Netcalc #
This is a simple CLI network calculator made in PHP. Usage is pretty straight
forward. For example, let say you want to know how many usable addresses you
will get with a 26 bit netmask, simply run the script as below:
php netcalc.php 26
The above command will give you the following outut:
Netmask
-------
In slash notation: 26
In dotted decimal: 255.255.255.192
In dotted binary: 11111111.11111111.11111111.11000000
Network size
------------
Total number of addresses: 64
Number of usable addresses for hosts: 62
## Copyright ##
Netcalc is written by Jack-Benny Persson and released under GNU GPL version 2.

10
netcalc.php
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@ -59,6 +59,11 @@ function print_netmask($number)
// Put it together in a binary string
$binary = "$ones$zeros";
// Make it dotted binary format
$dotted_binary = substr_replace($binary, ".", 8, 0);
$dotted_binary = substr_replace($dotted_binary, ".", 17, 0);
$dotted_binary = substr_replace($dotted_binary, ".", 26, 0);
// Make it dotted decimal format
$firstOctet = base_convert(substr($binary, 0, 8), 2, 10);
$secondOctet = base_convert(substr($binary, 8, 8), 2, 10);
@ -69,9 +74,8 @@ function print_netmask($number)
print "Netmask\n" ;
print "-------\n";
print "In slash notation: $mask\n";
print "In binary: ";
print $binary . "\n";
print "In dotted decimal: $firstOctet.$secondOctet.$thirdOctet.$forthOctet";
print "In dotted decimal: $firstOctet.$secondOctet.$thirdOctet.$forthOctet\n";
print "In dotted binary: $dotted_binary";
print "\n\n";
}