functions/SPClientFolder/New-SPClientFolder.ps1

#Requires -Version 3.0

# New-SPClientFolder.ps1
#
# Copyright (c) 2017 karamem0
#
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# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# SOFTWARE.

function New-SPClientFolder {

<#
.SYNOPSIS
  Creates a new folder.
.DESCRIPTION
  The New-SPClientFolder function adds a new folder to the folder.
.PARAMETER ClientContext
  Indicates the client context. If not specified, uses default context.
.PARAMETER ParentFolder
  Indicates the folder which a folder to be created.
.PARAMETER Name
  Indicates the folder name.
.PARAMETER Retrievals
  Indicates the data retrieval expression.
.EXAMPLE
  New-SPClientFolder $folder -Name "CustomFolder"
#>


    [CmdletBinding()]
    param (
        [Parameter(Mandatory = $false)]
        [Microsoft.SharePoint.Client.ClientContext]
        $ClientContext = $SPClient.ClientContext,
        [Parameter(Mandatory = $true, Position = 0, ValueFromPipeline = $true)]
        [Microsoft.SharePoint.Client.Folder]
        $ParentFolder,
        [Parameter(Mandatory = $true)]
        [string]
        $Name,
        [Parameter(Mandatory = $false)]
        [string]
        $Retrievals
    )

    process {
        if ($ClientContext -eq $null) {
            throw "Cannot bind argument to parameter 'ClientContext' because it is null."
        }
        $ClientObject = $ParentFolder.Folders.Add($Name)
        Invoke-SPClientLoadQuery `
            -ClientContext $ClientContext `
            -ClientObject $ClientObject `
            -Retrievals $Retrievals
        Write-Output $ClientObject
    }

}