Zip and Unzip File in Powershell 4

Question

I am using Windows Server 2012 R2 (64 bit). I have powershell version 4 available in it. I am trying to zip and unzip files. When I try Write-Zip command, it throws me following

Answer 1

Should work under PS4. SeeAdd-Zip and New-Zipfunctions

[CmdletBinding()]
Param(
 [Parameter(Mandatory=$True)]
 [ValidateScript({Test-Path -Path $_ })]
 [string]$sourceDirectory,

 [Parameter(Mandatory=$True)]
 [ValidateScript({-not(Test-Path -Path $_ -PathType Leaf)})]
 [string]$destinationFile,

 [Parameter(Mandatory=$True)]
 [int]$noOlderThanHours
 ) 

 function New-Zip
 { 
     param([string]$zipfilename)
     set-content $zipfilename ("PK" + [char]5 + [char]6 + ("$([char]0)" * 18))
     (dir $zipfilename).IsReadOnly = $false
 }

 function Add-Zip
 {
    param([string]$zipfilename) 

    if(-not (test-path($zipfilename)))
    {
      set-content $zipfilename ("PK" + [char]5 + [char]6 + ("$([char]0)" * 18))
      (dir $zipfilename).IsReadOnly = $false    

    }

    $shellApplication = new-object -com shell.application
    $zipPackage = $shellApplication.NameSpace($zipfilename)


      foreach($file in $input) 
      { 
          $zipPackage.CopyHere($file.FullName)
          Start-sleep -milliseconds 500
      }
 }

$oldest = (Get-Date) - (New-TimeSpan -Hours $noOlderThanHours)

$filesToZip = dir $sourceDirectory -Recurse | Where-Object {$_.lastwritetime -gt $oldest}

 Write-Host Going to zip following files 

 $filesToZip | foreach {Write-Host $_.FullName}



$filesToZip| Add-Zip $destinationFile