Delete all subsites (All Child Webs) - SharePoint 2013 and PowerShell

Error: There was a problem deleting Web site "/Subsite". Sites that have subsites or certain apps can't be deleted. Please try again after deleting all subsites and removing the apps.


Solution:
Run PowerShell command

 

 

Add-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue

 

Function Remove-ChildSites([Microsoft.SharePoint.SPWeb]$Web)

{

 Foreach($ChildWeb in $Web.Webs)

  {

  #Call the function recursively TO DELETE all sub-childs

  Remove-ChildSites($ChildWeb)

 }

    Write-host Removing web $Web.Url

  

    #Remove the web

 Remove-SPWeb $Web -Confirm:$false

}

 

$ParentWebURL="http://portal/site/"

 

#Get the Parent Web

$ParentWeb= Get-SPWeb $ParentWebURL

 

#Call the function to remove all child webs

Remove-ChildSites $ParentWeb