Some students said that tp5 should be recorded. Here I want to say that for novices, it is best not to use the latest version. For example, the current tp5 is still in the error correction stage, which means that it is still being investigated and corrected. Due to its own problems, it is not suitable for novices to learn. tp3.2.3 is a relatively new and more importantly stable version. It has been tested by everyone and allows everyone to learn more, so we use thinkphp3 .2.3