Can I have multiple require sections in composer.json?

Question

PHP

Can I have multiple require sections in composer.json? Or is it necessary to create multiple composer.json files? Then how does the composer install command understand which json file to use?

Answer 1

Can.

{
    "require": {
        "vendorfoo/lib1": "1.2.1",
        "vendorbar/lib2": "0.1.2"
    }
}

Answer 2

It is forbidden.
Do not ask "is it possible", ask: I want to do this, I thought that I can implement it this way, right?
Why do you need multiple sections? Looks like bullshit.