How to List Files in a Directory and its Subdirectories in PHP?

Listing Files in Directory and Subdirectories in PHP

In PHP, you can utilize directory iteration methods to traverse through a given directory and its subdirectories, effectively retrieving a list of all files within their hierarchical structure.

To achieve this, employ the following steps:

1. Instantiate a RecursiveDirectoryIterator object to recursively explore the directory and its subdirectories.
2. Create a RecursiveIteratorIterator to wrap the RecursiveDirectoryIterator and provide a way to iterate through the objects in a nested fashion.
3. Within the loop, filter out items like "." and ".." representing the current and parent directories, respectively.
4. To obtain the filename, use the $filename variable.

Here's an example that returns an array of file paths:

<code class="php">$files = array();
foreach (new RecursiveIteratorIterator(new RecursiveDirectoryIterator('.')) as $filename) {
    // filter out "." and ".."
    if ($filename->isDir()) continue;

    $files[] = $filename->getPathname();
}</code>

The resulting $files array will contain the full paths to all files in the current directory and its subdirectories. For instance, it could resemble:

<code class="php">array("folder1/file.jpg", "folder2/blah.word", "root/name.fileext")</code>

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