PowerShell function to create a GUID from a string value

Get-Guid.ps1

<#
.SYNOPSIS
    Generates a GUID from a given string value using MD5 hashing.

.PARAMETER Value
    The string value to generate a GUID from.

.EXAMPLE
    Get-Guid -Value "example string"
    Returns a GUID generated from the string "example string".
.EXAMPLE
    Get-Guid('Rogier Dijkman')
    Returns a GUID generated from the string "Rogier Dijkman".
    
    Guid
    ----
    3f5b5733-f9ae-26da-1d2e-63601f7b3c20

.NOTES
    Author: Rogier Dijkman
    Date: 2023-10-10
#>

function Get-Guid {
    [CmdletBinding()]
    param(
        [Parameter(Mandatory)]
        [ValidateNotNullOrEmpty()]
        [string]$Value
    )

    $MD5 = New-Object -TypeName System.Security.Cryptography.MD5CryptoServiceProvider
    $UTF8 = New-Object -TypeName System.Text.UTF8Encoding

    $bitString = ([System.BitConverter]::ToString($MD5.ComputeHash($UTF8.GetBytes($Value)))).replace("-","").ToLower()
    $guid = [System.Guid]::Parse($bitString)

    return $guid
}

Get-Guid

This function can be used to create a GUID from a string value.
In some cases this can be useful if you need to generate a value that is consistent based on the input value.

C:\> Get-Guid('Rogier Dijkman')

Guid
----
3f5b5733-f9ae-26da-1d2e-63601f7b3c20