Criando uma estrutura de arvore para o jsTree

public function createTreeStructure($dir) {
    $ar = array(
      'attributes'=>array('id'=>'node-root'),
      'data'=>'TESTS',
      'children'=>$this->createChildren($dir)
    );
    return $ar;
  }
  
  public function createChildren($dir) {
    static $n=0;
    $it = new RecursiveDirectoryIterator($dir);
    $arAll = array();
    foreach($it as $file) {
      if(strpos($file,'.svn') !== false) continue;
      $ar = array(
        'attributes'=>array('id'=>'node-'.$n),
        'data'=>$file->getFilename()
      );
      if($file->isDir()) {
        $ar['children'] = $this->createChildren($file);
      }
      $arAll[] = $ar;
    }
    return $arAll;
  }