Since the beginning of computer development, computer-related technologies have developed faster and faster. Today, with the rapid development of information technology, computer application technology seems to have been applied to various fields. In terms of second-hand transactions on campus, the previous transaction method was to deal with the second-hand market, which wastes a lot of resources. For example, after graduating from the college, some second-hand bicycles or electronic products that are not needed for them are often used by everyone. When the waste products are disposed of or transported to the second-hand market for trading, the user's experience will drop sharply. Many campuses have also begun to develop campus second-hand information websites. Such a system brings new experiences to users, especially in time In terms of space and space, users can conduct transactions no matter where they are, as long as they are connected to the Internet. The development project of this campus second-hand information website is developed with PHP technology and uses MySQL database to explain the functions of the campus second-hand information website and the needs of users, and then introduce the overall design of the system according to the needs of users for second-hand buying and selling. As well as its detailed design, it provides users with the construction method of the overall structure of the campus second-hand information website. So as to meet the needs of users' autonomous transactions.
Keywords: PHP technology; MYSQL; campus second-hand information website