powershell script for organize files in a folder，according to the year, month, day and extension

folder_organize.ps1

$path = "your folder path"
Set-Location $path
foreach ($file in (get-childitem  $path | where { ! $_.PSIsContainer } ))
{
   $year=$file.CreationTime.Year
   $month=$file.CreationTime.Month
   $day=$file.CreationTime.Day
   $ext=($file.Extension).Trim(".")
   $newpath=$path,$year,$month,$day,$ext -Join "\"
   if (Test-Path $newpath){
   Move-Item -literalpath $file $newpath}
   Else {
   md $newpath
   Move-Item -literalpath $file $newpath}
   
}

Works amazingly! Is it possible to make it work for files inside folders of $path as well?