How to zip folders using powershell - powershell

Question

I run a program in windows powershell which lists name of files which have been modified before 30 days. I need to compress these files in a zip format. What should be the code?
#List all the folders in G:\logfiles
$folders = (Get-ChildItem -Path "G:\logfiles" | Where-Object {$_.Attributes -eq "Directory"} | Select Fullname)
#looping all folders
Foreach ($folder in $folders)
{
$files = Get-ChildItem G:\logfiles\$folder | Where{$_.LastWriteTime -lt (Get-Date).AddDays(-30)
}
Foreach ($file in $files)
{
Move-Item $file G:\logfiles\$folder\$N # *To move files to a folder name $N*
}

Answer 1

I will refer you to powershell 5.0 and the new Compress-Archive cmdlet
Compress-Archive -DestinationPath $folderToZip

Answer 2

With the down function you can compress your files.
function zipFile($Source ,$DestZip ){
$folder = Get-Item -Path $Source
$ZipFileName = $DestZip + ".zip"
set-content $ZipFileName ("PK" + [char]5 + [char]6 + ("$([char]0)" * 18))
# Wait for the zip file to be created.
while (!(Test-Path -PathType leaf -Path $ZipFileName))
{
Start-Sleep -Milliseconds 20
}
$ZipFile = (new-object -com shell.application).NameSpace($ZipFileName)
#BACKUP - COPY
$ZipFile.CopyHere($Source)
Write-Host "#Created zip file :" $DestZip
}