How to Recursively List Files in Subdirectories with PHP?

PHP: Listing Files Recursively in Subdirectories

To list all files in a directory, including subdirectories, and store the results in an array, PHP offers several built-in functions that work together.

Using RecursiveIteratorIterator and RecursiveDirectoryIterator

The following code demonstrates how to achieve your desired result:

<code class="php">$directory = "foldername";

// Create a RecursiveDirectoryIterator object for the specified directory
$directoryIterator = new RecursiveDirectoryIterator($directory);

// Create a RecursiveIteratorIterator object for the directory iterator
$iterator = new RecursiveIteratorIterator($directoryIterator, RecursiveIteratorIterator::SELF_FIRST);

// Initialize an empty array to store the file names
$files = [];

// Iterate over the files in the directory
foreach ($iterator as $filename) {
    // Filter out "." and ".." directories
    if ($filename->isDir()) {
        continue;
    }

    // Add the file name to the array
    $files[] = $filename;
}</code>

Explanation

The RecursiveDirectoryIterator class creates an object that iterates through the files and directories in the specified path. The RecursiveIteratorIterator class provides a recursive iteration over a RecursiveIterator object, ensuring that subdirectories are also explored.

By filtering out "." and ".." directories with the isDir() method, we only add actual files to the $files array.

PHP Documentation

• [RecursiveDirectoryIterator](https://www.php.net/manual/en/class.recursivedirectoryiterator.php)
• [RecursiveIteratorIterator](https://www.php.net/manual/en/class.recursiveiteratoriterator.php)

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