How to put SSL in this system PHP Websokets

I created this chat on websokets but I can not use it in my SSL-enabled domain if someone can help link , they are 2 files from code to run 1 php executable and the javascript front end could not find on the internet

I'm running the server on a digital cloud ocean and the website on hostinger hosting

Part of the server code

$secKey = $headers['Sec-WebSocket-Key'];
$secAccept = base64_encode(pack('H*', sha1($secKey . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11')));
//hand shaking header
$upgrade  = "HTTPS/1.1 101 Web Socket Protocol Handshake\r\n" .
"Upgrade: websocket\r\n" .
"Connection: Upgrade\r\n" .
"WebSocket-Origin: $host\r\n" .
"WebSocket-Location: ws://$host:$port/demo/shout.php\r\n".
"Sec-WebSocket-Accept:$secAccept\r\n\r\n";
socket_write($client_conn,$upgrade,strlen($upgrade));