An explanation of how PHP uses two stacks to implement queue functions

This article mainly introduces the method of PHP using two stacks to implement the queue function. It analyzes the ideas and specific operation techniques of PHP based on the two stacks to implement the queue function in the form of examples. Friends in need can refer to it

The example in this article describes how PHP uses two stacks to implement the queue function. Share it with everyone for your reference, the details are as follows:

Question

Use two stacks to implement a queue and complete the Push and Pop of the queue operate. The elements in the queue are of type int.

Solution idea

Two stacks. When popping the stack, if stack 2 is not empty, pop stack 2. If stack 2 is empty, pop the item from stack 1 and put it into stack 2.

Implementation code

<?php
$arr1 = array();
$arr2 = array();
function mypush($node)
{
  array_push($arr1,$node);
}
function mypop()
{
  if(!empty($arr2)){
    return array_pop($arr2);
  }else{
    while(!empty($arr1)){
      array_push($arr2, array_pop($arr1));
    }
    return array_pop($arr2);
  }
}

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