According to a different thread you can use this instead of "/": PHP: $packet = new MessagePacket;$packet->source = "";$packet->message = "\nThis is a message";$player->dataPacket($packet);
The first line is defining the $packet variable as a MessagePacket, the second i dont really know but i know it is important, the third is the message that will be displayed in gray (\n will not appear but i think it is needed for this to work properly), and the last line sends the data to the player
try using PHP: $this->api->chat->broadcast->dataPacket($packet); for the last line. I dont know for sure that that will work though.
I found out this method when I was debugging ChatLineBreaker, but it will be overlapped by the next line.