Integer before json string?
I'm getting:
`0{"sid":"616e62f6-1c51-4b73-987c-8b0d5cff03d4","upgrades":["websocket"],"pingInterval":5000,"pingTimeout":20000}`

Is there a problem with the way I'm opening the messageInterface?
`$Socket->on('message', function (\Ratchet\RFC6455\Messaging\MessageInterface $wsdata) use ($var1,$var) {`