tp框架写了个方法获取顶级分类return结果就是null,在辅助函数都能打印出结果。
//通过id_category获取一级分类id function getParentInfo(){ $id_category=Tools::getValue('id_category'); $cate_info=$this->category_obj->where('id_category='.$id_category)->find(); //不是顶级 if($cate_info['pid']!=0){ $result=$this->getFirst($id_category); }else{ $result=$cate_info; } dump($result); // dump('顶级类是:'.$result['id_category'].':'.$result['name'].'<br/>'); } function getFirst($id_category){ $cate_info=$this->category_obj->where('id_category='.$id_category)->find(); echo $this->category_obj->getLastSql().'<br/>'; if($cate_info['pid']!=0){ $this->getFirst($cate_info['pid']); }else{ dump($cate_info); return $cate_info; } }
function getFirst($id_category){ $cate_info=$this->category_obj->where('id_category='.$id_category)->find(); echo $this->category_obj->getLastSql().'<br/>'; if($cate_info['pid']!=0){ $cate_info =$this->getFirst($cate_info['pid']); } return $cate_info; }
[解决办法]
要有返回值!