Nodejs how to pass ws message to php?

Question

PHP

Site on Bitrix

I am writing a functional that should work on websocket

server.js:

var WebSocketServer = new require('ws');
var dnode = require('dnode');

// подключённые клиенты
var clients = {};

var webSocketServer = new WebSocketServer.Server({
    port: 8081
});

webSocketServer.on('connection', function(ws) {

    var id = Math.random();
    clients[id] = ws;
    
    console.log("новое соединение " + id);

    ws.on('message', function(message) {
        
        console.log(message);

        clients[id].send(message);
    });

    ws.on('close', function() {
        console.log('соединение закрыто ' + id);
        delete clients[id];
    });
});

googled about dnode

The principle of operation should be as follows:
json comes from the client,
this json is passed to php (Bitrix)
data is processed on php and the result is returned to the client