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This article introduces the relevant knowledge of "how php deletes all files under the directory through recursion". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Paste the code first:

The copy code is as follows:

Let's start with a few functions:

Opendir (): the function opens a directory handle that can be used by closedir (), readdir (), and rewinddir ().

If successful, the function returns a directory stream, otherwise it returns false and an error. You can hide the output of error by adding "@" to the function name. For example, $dir=@ opendir ("image")

Readdir (): returns the entries in the directory handle opened by the opendir function, that is, the file names in the folder in order, sorted in the order established in the file system.

Id_dir (): that is, check whether the parameter file is a directory, and return true.

Un_link (): delete the formulation file.

So the idea of program execution is: the function calls the home directory, then sequentially detects whether each file is a directory, recursively calls the function if it is a directory, and deletes the files that are not directories until all the files are traversed.

This program only deletes the contents of the folder, not the folder itself. If you want to do this, add the following code:

The copy code is as follows:

Rmdir ($dirName)

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