This does the same thing and uses the current channel as default.

alias check {
  if ($active ischan) { 
    var %a $pos(+%@&~,$left($nick($chan,$1).pnick,1),1)
    return $iif(%a,%a,$null)
  }
}
on *:TEXT:*:#: {
  if ($1 == !testing) {
    if ($check($nick) == 5) { msg $chan You are owner of the chan }
    if ($check($nick) == 4) { msg $chan You are Admin on the chan }
    if ($check($nick) == 3) { msg $chan You are an Op this chan }
    if ($check($nick) == 2) { msg $chan You are Half-Op }
    if ($check($nick) == 1) { msg $chan You have just a voice here }
    if (!$check($nick)) { msg $chan You dont have any status in this chan or you must login }
  }
}