Toggle SharePoint feature on site and all children

toggle_feature.ps1

Function TraverseWebs($url, $feature)
{
  $web = Get-SPWeb $url
  foreach($child in $web.Webs)
  {
    ToggleFeature $web $feature
    if($child.Webs)
    {
      TraverseWebs($child.Url)
    }
  }
}

Function ToggleFeature($web, $featureName)
{
  $results = Get-SPFeature -Web $web | Where-Object { $_.DisplayName -eq $featureName }
  if($results) {
    Disable-SPFeature -Identity $featureName -Url $web.Url -Confirm:$false
    Enable-SPFeature -Identity $featureName -Url $web.Url
  }
}