Test-Guid.ps1
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<#
.SYNOPSIS Tests if the passed string is a valid GUID; returns $true or $false .PARAMETER Guid The string to validate .EXAMPLE Test-Guid -Guid '3845035f-a303-4e21-b2a5-f9218764a0e1' Tests the passed string (a valid GUID in this example) and returns $true or $false accordingly .EXAMPLE 'string1','test','3845035f-a303-4e21-b2a5-f9218764a0e1' | Test-Guid False False True Tests the strings passed down the pipeline and returns $true or $false accordingly #> function Test-Guid { [CmdletBinding()] param( [parameter(mandatory = $true, position = 1, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true)] [string[]]$Guid ) process { foreach ($g in $Guid) { Write-Verbose $g try { [System.Guid]::Parse($g) | Out-Null $true } catch { $false } } } } |