I have just started LEARNING BACKEND so which framework do you think is best to learn first(among flask, node.js and PHP) and use, and which backend programming language should I earn or is important? I have some prior knowledge in python and javascript.it would be nice if someone could point out the advantages of using one framework over the other.
On language, such that both the frontend and backend developers in sync. Node is a performant,easy to learn and good community support.
Rule out PHP since you aren't familiar with it, and learning it would take much time since PHP has turned out to be complex lately.
Node.js vs. Flask
Node.js is your go-to solution for developing speed-intensive websites and applications (eCommerce stores, chatbots, etc.). Flask isn't the ideal solution. Django (another Python-based web framework) is better than Flask.