<#  

    .SYNOPSIS

    Rename Multiple Files Extension

   

    .DESCRIPTION

    Get list of files by exteneion from folder

    Renames files with new extension you provide

    Works with file ext of any length .txt  .html .doc .docx .shtml etc...

   

    .OUTPUTS

    Logging of files that were changed.

    C:\temp\FilesChanged.txt  

 

    .NOTES

    Backup data before making changes.

    I Changed my website from HTML to PHP and needed to change file extensions on all my files.

    Requires user to have correct permissions on the root folder and files.  

#>

 

Try {

 

    #============================================

    # Enter folder path and File Ext Typer

    #============================================

    write-host ""

    $MyFolderPath = Read-Host "Enter Folder Path"

    write-host ""

    $Ext = Read-Host "Enter File Extention like .txt"

    write-host ""

    $NewExt = Read-Host "Enter New File Extension like .php"

 

    #============================================

    # Get List of Files from Folder

    #============================================

    $Myfile = Get-ChildItem $MyFolderPath -ErrorAction Stop

 

    #============================================

    # Get List of Files only with Extension .html

    #============================================

    $MyfileNew = @()

    $MyfileNew = $Myfile | Where { $_.Name -like "*$Ext" } -ErrorAction Stop

 

    #=======================================================

    # Displays list of files to be altered and Logs to File

    #=======================================================    

    # set the new color

    $host.UI.RawUI.ForegroundColor = "Green"

    Write-Output  "Files to be Chankged: `n"

    Get-Date | Out-File C:\temp\FilesChanged.txt -Append

    $MyfileNew.Name | Tee-Object C:\temp\FilesChanged.txt -Append

    Write-Output ""

    Pause

    # set the new color

    $host.UI.RawUI.ForegroundColor = "white"

 

    #============================================

    # Loop Through All File Names

    #============================================

    Foreach ($FileName in $MyfileNew.Name) {

 

        #=============================================================

        # Trim file removing Last 5 char (.html) and Appending .php

        #============================================================    

        $NewFileName = $FileName.Substring(0, $FileName.Length - $Ext.Length) + "$NewExt"

 

        #=================

        # Renames Files

        #=================    

        Rename-item "$MyFolderPath\$FileName" "$MyFolderPath\$NewFileName" -ErrorAction Stop

    }

}

Catch {

 

    Write-Output $_.Exception

 

}