Connecting to websocket with PHP client

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I would probably prefer to use an existing websocket client library (maybe https://github.com/gabrielbull/php-websocket-client or https://github.com/Devristo/phpws/tree/master/src/Devristo/Phpws/Client ?) rather than roll your own, but I got it to at least connect by using:

$head = "GET / HTTP/1.1"."\r\n".
    "Host: $host"."\r\n".
    "Upgrade: websocket"."\r\n".
    "Connection: Upgrade"."\r\n".
    "Sec-WebSocket-Key: asdasdaas76da7sd6asd6as7d"."\r\n".
    "Sec-WebSocket-Version: 13"."\r\n".
    "Content-Length: ".strlen($data)."\r\n"."\r\n";

My server is using TLS/SSL, so I also needed:

$sock = fsockopen('tls://'.$host, $port, $errno, $errstr, 2);

The full protocol spec is: https://tools.ietf.org/rfc/rfc6455.txt

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