PHP file operation example directory operation

In PHP, you can use a series of functions to operate on files and directories. This article will briefly introduce directory operations in PHP, including creating, deleting and traversing directories.

1. Create a directory

To create a directory in PHP, you can use the mkdir() function. The first parameter of this function is the path to the directory to be created, and the second optional parameter is the permission bits to be set. For example, the following code will create a directory named "test":

mkdir('test');

If you want to create a directory under the specified directory, you can add the path to the first parameter. For example, the following code will create a subdirectory named "subdir" in the directory named "test":

mkdir('test/subdir');

2. Delete the directory

For directories that are no longer used, you can Use the rmdir() function to delete it. The argument to this function is the path to the directory to be deleted. For example, the following code will delete a directory named "test":

rmdir('test');

Please note that the directory must be empty before using the rmdir() function to delete it. If the directory is not empty, a "Directory not empty" error will occur. If you want to force deletion of a non-empty directory, you can use the unlink() function to delete all files and subdirectories in the directory, and then use the rmdir() function to delete the directory itself. For example, the following code will delete the directory named "test" and all its contents:

function deleteDirectory($dir) {
    if (!file_exists($dir)) {
        return true;
    }

    if (!is_dir($dir)) {
        return unlink($dir);
    }

    foreach (scandir($dir) as $item) {
        if ($item == '.' || $item == '..') {
            continue;
        }

        if (!deleteDirectory($dir . DIRECTORY_SEPARATOR . $item)) {
            return false;
        }
    }

    return rmdir($dir);
}

deleteDirectory('test');

3. Traverse the directory

To traverse all files and subdirectories in the directory, you can use the scandir() function . The argument to this function is the path to the directory to be scanned. For example, the following code will list all files and subdirectories in the directory named "test":

foreach (scandir('test') as $item) {
    if ($item == '.' || $item == '..') {
        continue;
    }

    echo $item . '<br>';
}

IV. Summary

This article introduces the three basic functions for directory operations in PHP :Create a directory (mkdir()), delete a directory (rmdir()), and traverse all files and subdirectories in a directory (scandir()). PHP's file and directory operation functions can help us create, delete and manage directories in web applications, making it more flexible and easier to maintain.

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