PHP 获取栏目的【所有子级和孙级栏目】的ID号

    //@获取子栏目ID号
    private function sonCategoryIds($categoryID)
    {
        //@初始化栏目数组
        $array[] = $categoryID;
        
        do
        {
            $ids = '';
            $temp = $this->mysql->select('SELECT `id` FROM `pcb_article_category` WHERE `parentID` IN (' . $categoryID . ')');
            foreach ($temp as $v)
            {
                $array[] = $v['id'];
                $ids .= ',' . $v['id'];
            }
            $ids = substr($ids, 1, strlen($ids));
            $categoryID = $ids;
        }
        while (!empty($temp));

        $ids = implode(',', $array);
        
        return $ids;
    }


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