Resending messages from "onopen"
Code:

``` php
public function onOpen(ConnectionInterface $conn)
    {
        if (!($params = $this->getQueryParams($conn))) {
            return null;
        }

        if (!isset($this->clients[$params['id']])) {
            $conn->send(json_encode(['type' => 'OPEN']));
            static::debug("New connection! ({$conn->resourceId})");
        }
    }
```

Result: 
![Result Image](https://leto36d.storage.yandex.net/rdisk/faa1aacc2aa0382f570e2bbda2189686a7d740ea6987efd6fa2c4e7034475ffb/inf/0indfku7PPzlWSRjbcQvzbhZlq03CsMY48llEeS4_IfYOlfhIE3f7Y-EwlL0Gu50TLimkkfvZUxL3vpM0kGicA==?uid=0&filename=2015-08-24%2014_39_17-.png&disposition=inline&hash=&limit=0&content_type=image%2Fpng&tknv=v2&rtoken=1e2cc2305e3bbbd40f561dc361cf786b&force_default=no&ycrid=na-dc88d34cad606fa3bb355f37563c4adb-downloader11g)
