The problem of php calling js and getting the return value of js

Question

How does php call js and get the return value of js? Is there any more convenient plug-in or method

Answer 1

You can directly transplant js functions into php, usually with only minor changes.

Answer 2

This process seems to be reversed

Answer 3

It can be called in the form of a function, and an interactive js function can be written outside the PHP code segment. Just call this function in php return function