PHP recursive access to all files in the directory implementation method _php instance

As shown below:

/**
   * Recursive fetch all files within a folder
   * file system that returns a tree structure
   * @param string $dir
   * @param array $filter
   * @return Array $fil Es
  /function Scan_dir ($dir, $filter = Array ()) {
    if (!is_dir ($dir)) return false;
    $files = Array_diff (Scandir ($dir), Array ('. ', ' ... '));
    if (Is_array ($files)) {
      foreach ($files as $key => $value) {
        if (is_dir) ($dir. '/' . $value)) {
          $files [$value] = Scan_dir ($dir. '/' . $value, $filter);
          Unset ($files [$key]);
          Continue;
        }
        $pathinfo = PathInfo ($dir. '/' . $value);
        $extension = array_key_exists (' extension ', $pathinfo)? $pathinfo [' extension ']: ';
        if (!empty ($filter) &&!in_array ($extension, $filter)) {
          unset ($files [$key]);
        }
      }
    Unset ($key, $value);
    return $files;
  }

The above is a small series for everyone to bring the PHP recursive access to all the files in the directory of all the content, I hope that we support cloud Habitat Community ~