function search_by_graphic_num($num)
{
$files = File::find('all', array('conditions' => array(" graphic_num LIKE '%{$num}%' "), 'order' => 'id desc'));
$nodes = array();
foreach ($files as $count => $file) {
if (!$count) {
$nodes = backtrack_recursive($file->folder, array(), array(), $file);
} else {
$nodes = backtrack_recursive($file->folder, $nodes, array(), $file);
}
}
echo json_encode(strip_keys($nodes));
}