Thanks! Code for all PHP: public function onPlayerJoin(PlayerJoinEvent $event){ $player = $event->getPlayer(); $name = $player->getDisplayName(); $event->setJoinMessage(""); if ($player->getLevel()->getName() == "world"){ $world = $player->getLevel(); $players = $world->getPlayers(); foreach($players as $player){ $player->sendMessage("$name joined !");} } } Edit: It can be good for Alerts per world