php get files in a folder

<?php
$results = array();

    $directory = 'my_folder/files';
   
    // create a handler for the directory
    $handler = opendir($directory);

    // open directory and walk through the filenames
    while ($file = readdir($handler)) {

      // if file isn't this directory or its parent, add it to the results
      if ($file != "." && $file != "..") {
        $results[] = $file;
      }

    }

    // tidy up: close the handler
    closedir($handler);
   
    print_r($results);
?>