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This article mainly introduces "what is the method of deleting a directory in PHP". In daily operation, I believe that many people have doubts about the method of deleting a directory in PHP. Xiaobian consulted all kinds of materials and sorted out a simple and easy-to-use method of operation. I hope it will be helpful to answer the question of "what is the method of deleting a directory in PHP?" Next, please follow the editor to study!

The rmdir () function deletes an empty directory

In our daily use, we often encounter operations that need to delete files. It is also very simple to delete a directory in PHP, which can be achieved through the rmdir function in PHP. Next, let's take a look at the basic syntax format of the rmdir () function:

Rmdir (string $dirname [, resource $context])

Among them, it should be noted that:

Using the rmdir () function to delete a directory, there is a premise that the directory to be deleted must be empty, and an error may be returned if the deleted directory is not empty. The parameter $dirname indicates the directory path to be deleted, and the parameter $context, which specifies the environment of the file handle, is an optional parameter.

Next, let's take a look at deleting a directory through the rmdir () function. The example is as follows:

Then, in the example we gave above, we created a directory named test under the same level directory of the file, and there is also a directory called demo in test. In the above example, you want to delete the directory named demo through the rmdir function. Note that the directory named demo is empty, so output the result:

We have successfully deleted the empty directory named demo, we have implemented the ability to delete the directory, but this directory is only an empty directory, if the directory is not empty, what will happen? In our daily use, generally want to delete a folder can be deleted directly, but if you can only delete an empty directory through PHP, if you want to delete a large directory that is not particularly troublesome.

Next, let's see what happens to the output if the directory is not empty. Let's replace the $dir ='. / test/demo'; directory in the above example with an empty directory that is not empty, and see what happens. The example is as follows:

Output result:

From the above example, we can find that deleting directories that are not empty through the rmdir () function is not good, and the program will report an error. In that case, how can we delete a directory that is not empty?

The rmdir () function deletes a non-empty directory

In the last article, we mentioned that rmdir can only delete empty directories, and we are not helpless in the face of non-empty directories. Let's sort out our ideas and break them one by one.

First of all, we need to go to the directory and delete every file in the directory. At this time, we need to use the unlink () function. When the files in it are deleted, it is an empty directory. Just delete it using the rmdir () function.

However, sometimes there are not all files in the directory, there are also directories in the directory, and there may be files or another directory in this second-order directory, so recursive methods are needed to delete this non-empty directory.

Once you've sorted out your ideas, you can think about the functions you might use:

First of all, we still need the file_exists function to determine whether it is a directory, and then we use the readdir () function to get all the file names in the directory in the form of an array. If statements are used if the number of results returned exceeds two indicating that the current directory is not empty.

Let's take a look at how to delete a non-empty directory through an example, as follows:

The above example shows using file_exists to determine whether a directory exists, and then traversing the files or folders in the directory alone. In this case, you need to exclude the special directories returned through readdir, and then crack them one by one according to the above idea.

In the example, you want to delete a directory named "test" in the same directory of this file.

After running the program:

So we have finished deleting the non-empty directory through the rmdir () function.

At this point, the study on "what is the method of deleting a directory in PHP" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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