PHP designers who are new to template engines will find it difficult when they hear Smarty. In fact, the author is no exception and dare not touch it. But later when I analyzed the program architecture of XOOPS, I began to find that Smarty is actually not difficult. As long as you master the basic skills of Smarty, it is quite sufficient for general applications. Of course, if you can lay the foundation well, you don’t have to worry about the advanced applications later. The main purpose of this article is not to delve into the use of Smarty, which has been fully written in the official instructions for use. The author only writes down some of his own experience in using it, so that friends who want to understand Smarty but are unable to get in can get some inspiration from it. Just because the content of this article is not very in-depth, friends who know how to use Smarty may find it a bit simple.