function search($folder_path = null, $filename_pattern = null)
{
if (!isset($folder_path)) {
$folder_path = $this->_base_path;
}
if (!isset($filename_pattern)) {
$filename_pattern = $this->_file_name_pattern;
}
$results = parent::search($folder_path, $filename_pattern);
foreach ($results as $key => $result_file) {
if (is_dir($result_file->getPath()) || !is_writable($result_file->getPath()) || strpos($result_file->get_mimetype(), 'image') === 0) {
unset($results[$key]);
}
}
return $results;
}
