thinkphp之无限分类

namespace Home\Controller;
use Home\Controller;

class CategoryController extends Controller
{
    //无限分类读取导航
    protected function getCategory()
    {
        //实例化导航模型
        $category = M("category");
        //定义并且执行SQL，返回结果为数组
        $sql="SELECT title,catid,catname,listorder,ismean,arrparentid,concat(arrparentid,',',catid) as fullpath FROM `tp_category` as a,`tp_content_type` as b  where a.modelid = b.id  ORDER BY fullpath ASC;";
        $data = $category->query($sql);
        //定义空数组$result用来接收计算出层阶后的结果
        $result = array();
        foreach($data as $v)
        {
            $deep = count(explode(',',trim($v['fullpath'],',')));
            $v['catname'] = str_repeat('　',($deep-1)*3).'|--'.$v['catname'];
            $result[] = $v;
        }
        //将结果以二维数组返回
        return $result;        
    }

    //栏目列表    
    public function index()
    {
        //调用无限分类读取导航方法
        $data = $this->getCategory();
        //模版赋值
        $this->assign("data",$data);
        //调用模板
        $this->display();
    }

}

CREATE TABLE IF NOT EXISTS `tp_category` (
  `catid` int(4) NOT NULL AUTO_INCREMENT COMMENT '栏目ID',
  `catname` varchar(255) NOT NULL COMMENT '栏目名称',
  `url` varchar(255) NOT NULL COMMENT '栏目URL',
  `type` tinyint(1) NOT NULL DEFAULT '0' COMMENT '栏目类型',
  `modelid` tinyint(1) NOT NULL DEFAULT '0' COMMENT '模型ID',
  `parentid` int(4) NOT NULL COMMENT '父ID',
  `arrparentid` varchar(255) NOT NULL COMMENT '所有父类ID',
  `issoncatid` tinyint(1) NOT NULL DEFAULT '0' COMMENT '是否有子栏目',
  `listorder` int(4) NOT NULL DEFAULT '0' COMMENT '显示顺序',
  `ismean` tinyint(1) NOT NULL DEFAULT '1' COMMENT '是否显示，1表示显示；0表示隐藏',
  PRIMARY KEY (`catid`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 COMMENT='栏目表' AUTO_INCREMENT=36 ;

--
-- 转存表中的数据 `tp_category`
--

INSERT INTO `tp_category` (`catid`, `catname`, `url`, `type`, `modelid`, `parentid`, `arrparentid`, `issoncatid`, `listorder`, `ismean`) VALUES
(1, '最新资讯', '/Home/News/newsList', 1, 2, 0, '0', 0, 1, 0),
(2, '特色主题游学', '/Home/Characteristic', 1, 5, 0, '0', 1, 2, 0),
(3, '商学院海外访学', '/Home/Business', 1, 5, 0, '0', 1, 3, 0),
(4, '出国访学', '/Home/Goabroad', 1, 5, 0, '0', 1, 4, 0),
(5, '精彩视图', '/Home/Marvellous', 1, 3, 0, '0', 1, 5, 0),
(6, '营地风采', '/Home/Camp', 1, 2, 0, '0', 1, 6, 0),
(7, '专业答疑', '/Home/Answer', 1, 2, 0, '0', 0, 7, 0),
(8, '青少年特色游学', '/home/Teenagers', 1, 5, 0, '0', 0, 8, 0),
(9, '金融类海外研修', '/Home/Finance', 1, 5, 0, '0', 0, 9, 0),
(10, '美加路线', '/Home/Characteristic/list', 1, 5, 20, '0,2,20', 0, 1, 0),
(11, '澳洲路线', '/Home/Characteristic/list', 1, 5, 20, '0,2,20', 0, 2, 0),
(12, '欧洲路线', '/Home/Characteristic/list', 1, 5, 20, '0,2,20', 0, 3, 0),
(13, '亚洲路线', '/Home/Characteristic/list', 1, 5, 20, '0,2,20', 0, 4, 0),
(14, '精彩照片', '/Home/Marvellous/photo', 1, 3, 5, '0,5', 0, 1, 0),
(15, '精彩视频', '/Home/Marvellous/video', 1, 4, 5, '0,5', 0, 2, 0),
(16, '北美', '/Home/Camp/northAmerica', 1, 2, 6, '0,6', 0, 1, 0),
(17, '欧洲', '/Home/Camp/europe', 1, 2, 6, '0,6', 0, 2, 0),
(18, '澳洲', '/Home/Camp/australia', 1, 2, 6, '0,6', 0, 3, 0),
(19, '亚洲', '/Home/Camp/asia', 1, 2, 6, '0,6', 0, 4, 0),
(20, '本季特色游学', '/Study/', 1, 5, 2, '0,2', 1, 1, 0),
(21, '体育类专题游学', '/Study', 1, 5, 2, '0,2', 1, 2, 0),
(22, '足球特长', '/Study', 1, 5, 21, '0,2,21', 0, 1, 0),
(23, '篮球特长', '/Study', 1, 5, 21, '0,2,21', 0, 3, 0),
(24, '艺术类专题游学', '/Study', 1, 1, 2, '0,2', 0, 3, 0),
(25, 'MBA', '/Study', 1, 5, 3, '0,3', 0, 1, 0),
(26, 'EMBA', '/Study', 1, 5, 3, '0,3', 0, 2, 0),
(27, '美国', '/Study', 1, 5, 3, '0,3', 0, 3, 0),
(28, '英国', '/Study', 1, 5, 3, '0,3', 0, 4, 0),
(29, '欧洲', '/Study', 1, 5, 3, '0,3', 0, 5, 0),
(30, '以色列', '/Study', 1, 5, 3, '0,3', 0, 6, 0),
(31, '美国', '/S', 1, 5, 4, '0,4', 0, 0, 0),
(32, '英国', '/Study', 1, 5, 4, '0,4', 0, 2, 0),
(33, '澳洲', '/Study', 1, 5, 4, '0,4', 0, 3, 0),
(34, '加拿大', '/Study', 1, 5, 4, '0,4', 0, 4, 0),
(35, '留学直通车', '/Study', 1, 5, 4, '0,4', 0, 5, 0);

Field | Type | Null | Key | Default | Extra |
-------------+--------------+------+-----+---------+----------------+
catid | int(4) | NO | PRI | NULL | auto_increment |
catname | varchar(255) | NO | | NULL | |
url | varchar(255) | NO | | NULL | |
type | tinyint(1) | NO | | 0 | |
modelid | tinyint(1) | NO | | 0 | |
parentid | int(4) | NO | | NULL | |
arrparentid | varchar(255) | NO | | NULL | |
issoncatid | tinyint(1) | NO | | 0 | |
listorder | int(4) | NO | | 0 | |
ismean | tinyint(1) | NO | | 1 | |
-------------+--------------+------+-----+---------+----------------+