wildcards.ps1

function Search-Stuff
{
  param([string]$String)

  $Data = 'lol', 'lol123', '123lol', '123lol123'

  $Filter = if([WildcardPattern]::ContainsWildcardCharacters($string)){
    { $_ -like $string }
  } else {
    { $_ -eq $string }
  }

  return $Data |Where-Object $Filter
}