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PowerShell: Delete files by extension

Originally published

The following PowerShell script searches the folder specified by $folder and filters files using $extension. It displays each matching filename and deletes the file.

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$folder  = "C:\Users"
$extension = "cmd"
if (!($extension)){$filter="*"}
Else{$filter=foreach ($item in $extension.split(",")){$item.insert(0,"*.")}}
if (test-path $folder) {
    foreach ($file in get-childitem "$folder\*" -recurse -force -include $filter){
        write-host "Deleting file: $($file.fullname)"
        remove-item -literalPath $file.fullname -force
     } #end foreach
}#end if

Test the script before using it in production or distributing it.