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 who need it can refer to it. I hope it can help everyone. .

Question

Use two stacks to implement a queue and complete the Push and Pop operations of the queue. 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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