本文实例讲述了PHP+mysql实现从数据库获取下拉树功能。分享给大家供大家参考,具体如下:
<?php
include "config.php";
include "MySQL.php";
$db = new Mysql('test'); //几个简单的类,不用列出来大家也看得懂。就是实例化一个数据库连接而已。
function RootMenu ($PID,$n){
global $arr,$db;
$sql = "select * from menu where `PID` =$PID";
$result = $db->query($sql);
while ($i=$db->fetch