How to organize the simultaneous operation of the site in PHP and node.js?

Question

PHP

If you migrate the current version from PHP to Node.
Who has some experience, how to organize it? What not to rewrite at once, but in parts.
The main thing is authorization shared through Redis/db.
+ Proxy-routing through nginx to node.js, for certain urls.
Working option?

Answer 1

Since it is supposed to be rewritten on the Node, I advise you to take the microservices architecture as a basis:
Simplified:

1. We select a certain entity, for example, a user
   
2. Saw on Node a mini-API for managing users (adding / deleting / registering / recovering passwords, etc.)
   
3. We fasten PHP to this mini-API, thus testing the integration
   
4. Gradually, when all the business logic is rewritten to micro-services, you can transfer the front-end to some Node framework, the same express and you're done
   

Answer 2

Now I just rewrote the Django project to Noda, but I left the Django admin panel - I don’t feel like messing around. Everything works fine, you can live. I did not have to touch the database, so there are no problems. Of course, it is convenient to resolve all the urls with nginx - where to go for something. By the way, the nginx config is perfectly assembled by gulp using any general-purpose template engine.