In which folders are the ThinkPHP background codes usually placed?

It is suggested to create a new ThinkPHP project for background development, and the entry file is admin.php; Then another project is the front desk, and the entrance file is inde.php. The member center can also build a project independently, and the entrance file is user.php.

Others can also start new projects if they need to expand again. In this way, each project runs independently and does not interfere with each other, which is convenient for development and debugging management. In order to reduce the workload and facilitate the upgrade, we can also share some resources between projects. For example, you can use the d function to share models across projects.

Look at my architecture diagram: