How to organize electronic document management?

Question

PHP

We are considering the possibility of switching to electronic document management in the company. We had a presentation of several products, but they provide services on their servers.
Our company has developed a small software package (accounting, personnel ..), so we are interested in installing it on our servers with the possibility of further integration with our product and database. I ’ll clarify: full integration is not necessary, it’s enough to add code for data exchange between the database, maybe based on api or eksemelek ..
I myself have never encountered this, so I don’t even know which way to dig.
Writing from scratch is not an option, because. Lots of nuances and takes a lot of time.
Wishlist:
- complete transition from paper to electronic document management
- distribution of user rights
- a high level of protection
- a digital signature or something like that
- a system of fines and rewards
- control and tracking of signatories (for example, a document is not signed within three days - the system automatically issues a fine)
- a history of all actions
- typical templates
Language? php, java.
As a last resort, python will do. But the priority is still for php, because. javaists are busy now.
Didn't say: it should be a server system =)
We are considering both paid and free options.
Can anyone come across, advise something?

Answer 1

In the companies in which he worked, they mainly used Kontur.
https://kontur.ru/diadoc

Answer 2

Our company recommends and implements the Directum electronic document management system at enterprises. I personally work in a slightly different direction, but judging by the feedback from my colleagues, they like the system (that's why they recommend it), including due to integration with the website. I haven’t come across it myself, but it’s cursory for me that all these document management systems are kind of slow.

Answer 3

https://www.cuba-platform.com/ru