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$socket->on('join', function ($room)use($socket){
        $socket->join($room);
        $socket->room= $room;
    });
    // when the client emits 'new message', this listens and executes  //
    $socket->on('new message', function ($data)use($socket){
        //broadcast
        $socket->broadcast->emit($socket->room,array(
            'username'=>$socket->username,
            'type'=> 'text',
            'content'=> $data
        ));
    });