What is a php two-way queue

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Php two-way queue refers to a kind of data structure with the nature of queue and stack; elements in two-way queue can be popped up from both ends, and its limited insertion and deletion operations are carried out on both sides of the table; two-way queue is like a queue, but you can add or remove elements at either end.

This article operating environment: Windows7 system, PHP7.1 version, DELL G3 computer

What does php two-way queue mean?

PHP-implement a two-way queue with PHP

1. Brief introduction

Deque, full name double-ended queue, is a data structure with queue and stack properties. Elements in a double-ended queue can be popped from both ends, and their limited insertions and deletions are performed at both ends of the table. A two-way queue (double-ended queue) is like a queue, but you can add or remove elements at either end.

Reference: http://zh.wikipedia.org/zh-cn/%E5%8F%8C%E7%AB%AF%E9%98%9F%E5%88%97

2.PHP implementation code