PowerShell: Validate Email or IPv4 Address using Regex

Test-Address.ps1

function Test-Address {

    [CmdletBinding(DefaultParameterSetName = "EmailAddress")]
    param (
        [parameter(ParameterSetName = "EmailAddress")] $EmailAddress,
        [parameter(ParameterSetName = "IPv4")] $IPv4
    )


    if ($EmailAddress) {
        $patern = '^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$'
        $DidMatch = $EmailAddress -match $patern
    }
    if ($IPv4) {
        $patern = '^([1-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])(\.([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])){3}$'
        $DidMatch = $IPv4 -match $patern
    }

    
    if ($DidMatch) {
        return $true
    }
    else {
        return $false
    }


}