welcome users that have not any channel prefix v2.0

ON !*:JOIN:#zu: {
  .timer[GREET_ $+ $chan $+ _ $+ $nick $+ ] 1 3 welcome_user $chan $nick
}

alias welcome_user {
  if (!$1-) { return }
  if ($me !ison $1) { return }
  if ($2 !ison $1) { return }
  if ($2 !isreg $1) { return }
  .msg $1 [ $+ $2 $+ ]: Hello, join Zerg Unit @ www.clan-zu.com
}