CREATE TABLE `NewTable` ( `id` int(11) UNSIGNED NOT NULL AUTO_INCREMENT , `pid` int(10) UNSIGNED ZEROFILL NOT NULL , `name` varchar(30) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL , `path` varchar(200) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL , PRIMARY KEY (`id`) ) ENGINE=MyISAM DEFAULT CHARACTER SET=utf8 COLLATE=utf8_general_ci AUTO_INCREMENT=53 CHECKSUM=0 ROW_FORMAT=DYNAMIC DELAY_KEY_WRITE=0 ;

    
四个字段的无限分类
 请选择上级分类： 顶级分类 {foreach $cates as $vo} |{$vo.pre}{$vo.name} {/foreach} 
 请填写分类的名称：

 order('concat(path,"-",id)')->select(); #order('concat(path,"-",id)')自动排序 foreach ($data as &$cate) { $prefix=''; $i=count(explode("-", $cate['path'])); for($n=0;$n<=$i;$n++){ $prefix.="--"; } $cate['pre']=$prefix; } $this->assign('cates',$data); return $this->fetch(); } public function add(){ $db=Db::name('categroy'); if($_POST['pid']==0){ $_POST['path']=0; }else{ $_POST['path']=$db->where('id='.$_POST['pid'])->value('path')."-".$_POST['pid']; } $name=$_POST['name']; if($db->insert($_POST)){ $this->success('添加成功'); }else{ $this->error('添加失败'); } #原理：4个字段 /* ID PID NAME PATH 1 0 服装 0-1 2 0 游戏 0-2 3 1 男装 0-1-3 4 3 上衣 0-1-3-4 */ }} 

 public function user(){ $db=Db::name('categroy1'); // $data=$db->getTree(); $opt=$db->getOption($data); $this->assign('opt',$opt); $this->assign('cates',$data); return $this->fetch(); } public function doAdd(){ //执行添加数据 $db=Db::name('categroy1'); if($db->insert()){ $this->success('添加成功',url('index')); }else{ $this->error('添加失败',url('index')); } return $this->fetch(); }

 where('pid='.$pid)->select(); foreach($data as &$cate){ #通过该分类的主键id查询该分类的子类 $cate['cates']=$this->getTree($cate['id']); } return $data; } #拼装属性结构 #通过一个数组组装option public function getOption($data){ static $i=0; for($n=0;$n<=$i*2;$n++){ $prefix.="-"; } foreach ($data as $cate) { $opt.="".$prefix.$cate['name'].""; #判断该分类下是否包含子类，如果有子类，将数组传入接着拼装 if(!empty($case['cates'])){ $i++; $opt.=$this->getOption($case['cases']); }else{ $i=0; } return $opt; } } }