1.使用的是tp5框架,先下载好配置好代码
2.设计数据库 添加数据
CREATE TABLE `tp5_goods_class` (
`id` int(11) NOT NULL,
`name` varchar(255) NOT NULL COMMENT '分类名字',
`pid` int(11) NOT NULL COMMENT '分类父id',
`path` varchar(255) NOT NULL COMMENT '路径',
`level` varchar(255) NOT NULL COMMENT '层级'
) ENGINE=InnoDB DEFAULT CHARSET=utf8
3.写代码查询出所有分类
public function classadd(){
$res=Db::name('goods_class')->field("*,concat(path,',',pid) as paths")->order('paths')->select();
// var_dump($res);exit();
foreach ($res as $k=>$v){
$res[$k]['name']=str_repeat('|---',$v['level']).$v['name'];
}
var_dump($res);
$this->assign('data',$res);
return $this->fetch();
}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form action="add" method="post">
<select>
<option value="0">顶级分类</option>
{volist name="data" id="vo"}
<option value="{$vo.id}">{$vo.name}</option>
{/volist}
</select>
<input type="submit" value="提交">
</form>
</body>
</html>