How to create and manage directories using PHP built-in functions?

PHP built-in functions can be used to create, manage and delete directories. Specific steps include: Use mkdir() to create the directory. Use is_dir() to check if the directory exists. Use scandir() to read the directory contents. Use rmdir() to delete empty directories. Use array_map() and unlink() to recursively delete non-empty directories.

How to use PHP built-in functions to create and manage directories

PHP has a variety of built-in functions to create, manage and delete directories . This article will take you through how to use these functions and provide practical case illustrations.

Create directory

mkdir() function is used to create a new directory. It takes two parameters: directory path and permissions (default is 0777).

mkdir('my-directory'); // 创建 my-directory 目录

Create multi-level directories

You can use the mkdir() function to create multiple levels by passing the recursion flag true parameter. level directory.

mkdir('path/to/my-directory', 0777, true); // 创建 path/to/my-directory 目录及其父目录

Check whether the directory exists

is_dir() The function can be used to check whether the specified path is a directory.

if (is_dir('my-directory')) {
    // my-directory 目录存在
}

Read directory contents

scandir() The function returns a list of all files and subdirectories in the specified directory.

$files = scandir('my-directory'); // 获取 my-directory 目录中的文件和子目录

Delete directory

rmdir() function is used to delete empty directories.

rmdir('my-directory'); // 删除 my-directory 目录

Delete non-empty directories

To delete non-empty directories, you can use array_map() and unlink() The function deletes its contents recursively.

function delete_directory($path) {
    array_map('unlink', glob("$path/*"));
    rmdir($path);
}

delete_directory('non-empty-directory'); // 删除非空目录 non-empty-directory

Practical case: Creating and managing file upload directories

Suppose you have a file upload function that needs to save user-uploaded files. The following is a practical example of using PHP's built-in functions to create and manage file upload directories:

// 创建文件上传目录
if (!is_dir('uploads')) {
    mkdir('uploads', 0777, true);
}

// 处理用户上传的文件
if ($_FILES['file']['size'] > 0) {
    $filename = $_FILES['file']['name'];
    move_uploaded_file($_FILES['file']['tmp_name'], 'uploads/' . $filename);
}

In general, PHP has built-in powerful functions to create, manage and delete directories. By following the steps in this article, you can easily perform these operations and apply them to your PHP applications.

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