File system

We will right-click the mouse to delete the file, control+c (or right-click) to copy and paste the file, and create some new files to check whether the file is a read-only file.

It would be great if these operations performed in the computer can be performed in the code.

Because, if there are these operations. We can do a lot of things:

1. Can I write and modify the configuration file?
2. Is it possible to detect file permissions during PHP installation?
3. Is it possible to generate Html files and many other operations

.... . File operations are used in too many other places.

Learning file processing is essentially learning file processing functions. Combine it with the code you wrote before to improve your business processing capabilities.