Upload file to SharePoint Document library using powershell

I want to upload the same file to multiple site collections with the same hierarchy in all the site collections. I want to use PowerShell and include auto check-in/check-out functionality.

I have able to upload the file in SharePoint. Below is the code. :

[System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint") > $null# create the Variable Path and Pass the source folder path$path = “D:\ABC\DEF\26Nov\”;# create the Variable destination and pass the URL of the SharePoint List$destination = "complete URL of File will be mentioned here";# Store the current user default credentials in the Variable Credentials$credentials = [System.Net.CredentialCache]::DefaultCredentials;# Create the object of the Webclient$webclient = New-Object System.Net.WebClient;# Pass the user credentials$webclient.Credentials = $credentials; Get-ChildItem# “For Each” loop will upload all of the files one by one onto the destination using the UploadFile methodGet-ChildItem $path | ForEach-Object { $webclient.UploadFile($destination +“/”+ $_.Name, “PUT”, $_.FullName)};

By this code the file is uploaded but checked out. I want it to be checked in automatically. In case the file is there then first automatically check-out and then check in.