A php+txt text guestbook, only one .php can realize the display, addition and deletion of the guestbook, and store it in the .txt text according to certain rules. The entire message board program uses an array to read out the message content. It is only a dozen KB, and the source code does not have many lines. It can also display facial expressions in the guestbook. It mainly uses PHP's file operation functions to operate the guestbook program. The page is very beautiful and can be used as a small guestbook for research. In addition to having all the functions of the previous two versions, Summer PHP Text Guestbook V0.03 has optimized the source code and mainly added paging display. You can delete text message information by logging in. It can be directly applied to the website and is suitable for applications without Mysql database space. Summer PHP text guestbook V0.03 uses txt as the database, which can be directly placed in the space that supports PHP without using the Mysql database. The data is completely saved in txt text.