/*** 无级递归分类* @param int $assortPid 要查询分类的父级id* @param mixed $tag 上下级分类之间的分隔符* @return string $tree 返回的分类树型结构结果 **/function recursiveAssort($assortPid, $tag = ''){ $assort = M('goods_class')->where("class_pid = $assortPid")->field('class_id, class_name')->select(); foreach ($assort as $value) { $tree .= ''; $tree .= recursiveAssort($value['class_id'], $tag . ' '); } return $tree;}