How to implement reverse Polish expression to calculate salary in PHP

Reverse Polish Notation (RPN) is an algorithm for calculating mathematical expressions. It expresses the order of calculation by placing operators after the operands without using parentheses to clarify precedence. In this article, we will use the PHP programming language to implement an example of calculating wages to show how to use reverse Polish expressions to handle complex calculation logic.

1. Create a reverse Polish expression class

We first create a RPNCalculatorclass named to handle the calculation logic of the reverse Polish expression. Here is the code for the class:

class RPNCalculator {
   
    
    
    private $stack;

    public function __construct() {
   
    
    
        $this