phpweb/application/index/controller/Base.php

<?php
namespace app\index\controller;
use think\Controller;
use think\Request;
use think\Db;
class Base extends Controller
{
    function _initialize()
    {
        if(!session('id') || !session('name')){
			header("location:".SITE_URL."/index.php/index/login");exit;
        }
        $data=Db::query("select * from sys_menu order by id ");
        $menu= $this->getTree($data, 0);
        $this->assign('topmenus',$menu);
    }

    function getTree($data, $ppd)
    {
        $html = '';
        $ppid=-1;
        foreach($data as $k => $v)
        {
            if($v['pid'] == $ppd)
            { //父亲找到儿子

                if($v['linkurl']!=null && $v['linkurl']!="")
                {
                    $html .= "<li ><a  href=\"".url($v['linkurl'])."\" >" . $v['pidname']."</a>";
                }
                else
                {
                    $html .= "<li ><a  href=\"#\" >" . $v['pidname']."</a>";
                }
                $ppid=$v['ppid'];
                $html .= $this->getTree($data, $v['id']);
                $html = $html . "</li>";
            }
        }
        if($ppd==0) {
            return $html ? '<ul class="nav">' . $html . '</ul>' : $html;
        }
        else
        {
            return $html ? '<ul  >' . $html . '</ul>' : $html;
        }
    }
    

}