[Typecho] Gets the parent class name?

For example, there are 2 parent class A, B
Subcategories of 4 were A-1, A-2, B-1, B-2
I want to get the parent category name in the sub-category article: What should A or B do?

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For example, there are 2 parent class A, B
Subcategories of 4 were A-1, A-2, B-1, B-2
I want to get the parent category name in the sub-category article: What should A or B do?

$this->categories;You can output all current classifications, and then you can go to the database to read them yourself. Look forward to a better approach.

//获取顶级分类function topcategory($category) {    $db = Typecho_Db::get();     $prefix = $db->getPrefix();     $rs = $db->fetchRow($db->select()->from($prefix.'metas')->where('slug = ?', $category)->limit(1));    if($rs['parent']==0){        return $rs['slug'];    }    else {        $rs2 = $db->fetchRow($db->select()->from($prefix.'metas')->where('mid = ?', $rs['parent'])->limit(1));        return $rs2['slug'];    }}

See www.sisi321.com

I know that, too.
The problem is I just need to output the parent's name A or b separately

