$directory = new RecursiveDirectoryIterator('path/to/directory'); $iterator = new RecursiveIteratorIterator($directory); // iterate over all files in the directory foreach ($iterator as $file) { // processing code here } // reset the iterator to the beginning $iterator->rewind(); // iterate over all files again foreach ($iterator as $file) { // processing code here }In this example, we create a `RecursiveIteratorIterator` object using a `RecursiveDirectoryIterator` object and loop through all the files in the directory. After that, we call the `rewind()` method on the iterator to reset it to the beginning and loop through the files again. The package/library for the `RecursiveIteratorIterator` class is included in the core PHP language. No additional installation or package is required.