随着互联网的普及以及发展，在网上出售、购买东西变得越来越日常，出于对校园发展的考虑，在很多校园里都实现了各式各样的二手网站，提高了校园资源的利用效率。然而，搭建大部分的网站所需要花费的人力和财力普遍较高，部署高能硬件也是一道坎，使得大部分中二手网站都没有成型，平台的后期维护费用也拖垮了不少用户。怎样解决这个问题？我们需要找到一个更优的技术和方法，来降低网站的响应时间和做到提高系统高并发性性能，提升用户的使用体验，降低硬件需求度，能够使用更便宜的硬件进行部署，从而降低网站建设的成本。此校园二手交易网站的开发项目采用PHP技术+MYSQL数据库，就论题的各类需求分析说明做出解释，然后再就网站的总体设计和详细设计做出论述，给出了网站总体结构的搭建方法。从而满足大部分中二手网站的需求。
关键词：PHP技术；MYSQL；校园二手交易网站
Abstract
With the popularity and development of the Internet, selling and buying things on the Internet has become more and more daily. For the consideration of campus development, a variety of second-hand websites have been realized in many campuses, which improves the utilization efficiency of campus resources. However, the human and financial resources required to build most websites are generally high, and the deployment of high-energy hardware is also a barrier, which makes most medium and second-hand websites not formed, and the later maintenance cost of the platform has also brought down many users. How to solve this problem? We need to find a better technology and method to reduce the response time of the website, improve the high concurrency performance of the system, improve the user experience, reduce the hardware demand, and be able to deploy with cheaper hardware, so as to reduce the cost of website construction. The development project of this campus second-hand trading website adopts PHP technology + MySQL database to explain the various needs analysis instructions of the topic, then discusses the overall design and detailed design of the website, and gives the construction method of the overall structure of the website. So as to meet the needs of most medium and second-hand websites.
Keywords: PHP technology; MYSQL； Campus second-hand trading website
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