Materials on the integration of web applications with 1C

Question

PHP

I want to learn how to integrate my own and other people's products (CMS, etc.) with 1C. Where can I find tutorials on this? There are a lot of offers on the network for integration services with 1C, but there are no training materials on how to learn how to do it yourself.
Links are welcome!

Note: "Products" refers to various web applications written in PHP.

Answer 1

See the documentation for Bitrix + its sources.
I note that in general this is not a very good direction for research and development. Yes, at first glance it seems “stable”, but in practice you will have to fish aground.

Answer 2

mista.ru