Discuss how to delete directories and files using PHP

PHP is a commonly used back-end language, and developers often need to perform file system operations. Here, we discuss how to delete directories and files using PHP.

The basic idea of ​​deleting a directory is to delete all the files and subdirectories it contains, and then delete the directory itself. First we need to find all subdirectories and files, i.e. everything under the current directory, then delete recursively, and finally delete the directory itself.

The following is the code to delete the directory:

function deleteDir($dirPath) {
    if (!is_dir($dirPath)) {
        return false;
    }

    if (substr($dirPath, strlen($dirPath)-1, 1) != '/') {
        $dirPath .= '/';
    }

    $files = glob($dirPath.'*', GLOB_MARK);
    foreach ($files as $file) {
        if (is_dir($file)) {
            deleteDir($file);
        } else {
            unlink($file);
        }
    }

    rmdir($dirPath);
    return true;
}

The above code defines a function named deleteDir, whose parameter is the directory path to be deleted. First check if the path is a directory and return false if not. Because we are only dealing with directories here, if the path passed in is a file, it cannot be deleted. Then determine whether the path ends with a slash, and add one if not to avoid errors in subsequent operations.

Then use the glob function to list all files and subdirectories. If an element is a directory, the directory is deleted recursively. If it is a file, delete it directly. Finally delete the directory itself and return true.

The next is the code to delete the file:

function deleteFile($filePath) {
    if (!is_file($filePath)) {
        return false;
    }

    return unlink($filePath);
}

The above code defines a function named deleteFile, whose parameter is the path of the file to be deleted. First check if the path is a file and return false if not. Then use the unlink function to delete the file and return true.

Note: The deletion operation is irreversible. Once deleted, it cannot be recovered. Therefore, when using the above code, you should carefully check whether the directory or file to be deleted is correct.

The above is how to delete directories and files using PHP. Hope this article can be helpful to you.

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