How to traverse folders to get the image directory name and file name through php

public function doImportImages(Q_Request $input, Q_Response $output)
{
    $dir    = VAR_PATH . 'images';      //此处为存放所有图片的目录
    $result = $this->_importImages($dir);    //获得的所有图片目录以及文件名，以多维数组形式返回，方便处理
}private function _importImages($dir)
{
    $handle = opendir($dir); //读资源
    if (!$handle) {
        return false;
    }
    $result = [];
    $module = 'images';

    while (($file = readdir($handle)) !== false) {
        if ($file != '.' && $file != '..') {
            $curPath = $dir . '/' . $file;

            if (is_dir($curPath)) {//判断是否为目录，递归读取文件
                $result[$file] = $this->_importImages($curPath);
            } else {
                $uploadObj = Lib_Upload::getUploadObj($module, false);
                $uploadObj->doUpload($curPath, Q_Upload::UPDATE_TYPE_PATH);   //此处做了图片上传动作，如果不需要请自行调整
                $data     = $uploadObj->data();
                $result[] = $data['fileCreateUrl'];
            }
        }
    }
    closedir($handle);

    return $result;
}