# encoding: ascii
# api: powershell
# title: 
# description: REALLY validates given IP address and returns True/False.  The original script didn’t allow ZEROS in the Ip address (eg: 127.0.0.1 returned $false)
# version: 172.30.2.112
# author: mow01
# license: CC0
# x-poshcode-id: 5841
# x-archived: 2016-09-07T04:22:20
# x-published: 2016-05-02T07:28:00
#
# now without trap
#
# validate given IP address as an IPAdress (given string input)
PARAM($IP=$(read-host "Enter any IP Address"))

## YOU could do this, but ...
# $IP -match "(\d{1,3}).(\d{1,3}).(\d{1,3}).(\d{1,3})" -and -not ([int[]]$matches[1..4] -gt 255)

## you shouldn't parse things yourself when it's in the framework. You might make a mistake ;-)
#trap { return $false }
#[IPAddress]$IP  # Just cast it to an IPAddress ... if it's valid, it will work.
#return $true

## no trap needed if tryparse is used 

#[system.net.IPAddress]::tryparse($ip,[ref]$null)

# when you still need the parsed IP number :

[ref]$a = $null
[system.net.IPAddress]::tryparse($ip,$a)
