public function tree($vid, $parent = 0, $max_depth = NULL)
{
static $trees = [];
if (empty($trees[$vid])) {
$tree = array();
$cleanParent = array();
$elems = \Yii::$app->db->createCommand('SELECT * FROM {{%taxonomy_items}} taxonomy_items WHERE vid = :vid ORDER BY weight')->bindValue(':vid', $vid)->queryAll();
foreach ($elems as $itm) {
$tree[$itm['id']] = $itm;
}
$tree = DataHelper::treeMap($tree);
$trees[$vid] = $tree;
} else {
$tree = $trees[$vid];
}
if ($parent) {
$tree = DataHelper::treeParent($tree, $parent);
}
if ($max_depth !== NULL) {
$tree = DataHelper::treeDepth($tree, $max_depth);
}
return $tree;
}
