RecursiveDirectoryIteratorToArray.php

/**
 * [A function to build an array from a provided directory path]
 * @param  \DirectoryIterator resource
 * @param  array or null
 * @param  array or null
 * @param  boolean or null (default = false)
 *
 * @return  array
 */
function DirectoryIteratorToArray(\DirectoryIterator $it, $file_exclude = ['.DS_Store'], $directory_exclude = [], $fullpath=false) {

  $file_exclude = (is_array($file_exclude))? $file_exclude : [$file_exclude];
  $directory_exclude = (is_array($directory_exclude))? $directory_exclude : [$directory_exclude];

  $result = array();
  foreach ($it as $key => $child) {
    if ($child->isDot()) {
      continue;
    }
    if ($child->isDir()) {
      $subit = new \DirectoryIterator($child->getPathname());
      if(!in_array($child->getBasename(), $directory_exclude)){
        $result[$child->getBasename()] = DirectoryIteratorToArray($subit, $file_exclude, $directory_exclude, $fullpath);
      }
    } else {
      if(!in_array($child->getBasename(), $file_exclude)){
        $result[] = ($fullpath)? $child->getPathname() : $child->getBasename();
      }
    }
  }
  return $result;
}

$directories = DirectoryIteratorToArray(new \DirectoryIterator($directory), null, null, true);