The broadcast function broadcasts the given event to its listeners:
<?php broadcast(new UserRegistered($user));

broadcast(new UserRegistered($user))->toOthers();
<?php     public function send(): void

    {

        $broadcast = broadcast($this)->via($this->connection);



        if (! $this->includeCurrentUser) {

            $broadcast->toOthers();
<?php         }



        if (! empty($this->broadcastOn($event)) || ! empty($channels)) {

            return broadcast($instance->onChannels(Arr::wrap($channels)));

        }

    }
<?php     public static function broadcast()

    {

        return broadcast(new static(...func_get_args()));

    }

}