Powershell script to remove UTF-8 BOM from files in current directory

remove-bom-recursively.ps1

# http://robertwesterlund.net/post/2014/12/27/removing-utf8-bom-using-powershell

foreach($file in Get-ChildItem -Path $PSScriptRoot -Include *.php -Recurse -ErrorAction Continue -Force) {
  $reader = $file.OpenRead()
  $byteBuffer = New-Object System.Byte[] 3
  $bytesRead = $reader.Read($byteBuffer, 0, 3)
  if ($bytesRead -eq 3 -and
    $byteBuffer[0] -eq 239 -and
    $byteBuffer[1] -eq 187 -and
    $byteBuffer[2] -eq 191)
  {
    echo "Removing UTF8 BOM on $($file.FullName)"
    $tempFile = [System.IO.Path]::GetTempFileName()
    $writer = [System.IO.File]::OpenWrite($tempFile)
    $reader.CopyTo($writer)
    $writer.Dispose()
    $reader.Dispose()
    Move-Item -Path $tempFile -Destination $file.FullName -Force
  }
  else
  {
    $reader.Dispose()
  }
}