Input_from_pipeline_or_parameters.ps1

#https://communary.net/2015/01/12/quick-tip-determine-if-input-comes-from-the-pipeline-or-not/
function Invoke-Test {
    [CmdletBinding()]
    param (
        [Parameter(ValueFromPipeline)]
        [PSObject[]] $InputObject,
 
        [Parameter()]
        [string] $SecondParam
    )
 
    if ($PSCmdlet.MyInvocation.ExpectingInput) {
        "Data received from pipeline input: '$($InputObject)'"
    }
 
    else {
        "Data received from parameter input: '$($InputObject)'"
    }
}