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先找第一层
然后在里面递归获取下一层的
如果你知道递归怎么写的应该就明白了
要看效果，你加Q:573780643
1.jquery支持
script type="text/javascript" src=""/script
script type="text/javascript" src=""/script
script type="text/javascript"
$(document).ready(function() {
$('#tree').lightTreeview({
collapse: true,
line: true,
nodeEvent: true,
unique: true,
style: 'black',
animate: 400
});
});
/script
2.树菜单函数
?
function getCategoryTree($TID, $iTable,$url,$urlPar="1=1") {
if ($TID == 0) {
$treeStr = $treeStr."ul id=\"tree\" class=\"lightTreeview treeview-black\"";
}
$sql = "select * from `$iTable` where TID1 = ".$TID." order by orderid";
$rs = mysql_query($sql);
while ($ary = mysql_fetch_array($rs)) {
$treeStr = $treeStr."li";
$rs2 = mysql_query("select count(*) from `$iTable` where TID1 = ".$ary["id"]);
$Vcount = @mysql_result($rs2, 0);
if ($Vcount != 0) {
$treeStr = $treeStr."div class=\"treeview-folder\"".$ary["title"]."/divul style=\"display:none\"";
$treeStr = $treeStr.getCategoryTree($ary["id"], $iTable,$url,$urlPar);
$treeStr = $treeStr."/ul";
} else {
$treeStr = $treeStr."div class=\"treeview-file\"a href=\"".$url."?T=".$ary["id"]."".$urlPar."\" target=\"pro\"".$ary["title"]."/a/div";
}
$treeStr = $treeStr."/li";
}@mysql_free_result($rs);
if ($TID == 0) {
$treeStr = $treeStr."/ul";
}
return $treeStr;
}
?
3.页面上调用
div
?=getCategoryTree(0,"N_type","edit.php","1=1")?
/div
4.数据结构
id title TID1(上一级ID)
打开数据库那就不写了。
前几天刚写了一个。你看下
/* 表结构
CREATE TABLE `lh_categroy` (
`id` int(10) NOT NULL auto_increment,
`parentid` int(6) NOT NULL,
`name` varchar(255) NOT NULL,
`keyword` varchar(255) NOT NULL COMMENT '关键字',
`des` varchar(255) NOT NULL COMMENT '描述',
PRIMARY KEY (`id`),
UNIQUE KEY `name` (`name`)
) ENGINE=MyISAM AUTO_INCREMENT=44 DEFAULT CHARSET=utf8;
*/
/**
* 获得所有栏目排序后的列表
* @return array
*/
function getAllOrderColumns($id = 0) {
global $columns;
$result = array();
if ($id) $result[$id] = $columns[$id];
foreach ($columns as $column) {
if ($column['parentid'] == $id) {
$column['level'] = 0;
$result[$column['id']] = $column;
getColumns($columns, $column['id'], $result, 1);
}
}
return $result;
}
function getColumns($columns, $cid, $result, $l = 1) {
foreach ($columns as $c) {
if ($c['parentid'] == $cid) {
$c['level'] = $l;
$result[$c['id']] = $c;
getColumns($columns, $c['id'], $result, $l + 1);
}
}
}
$sql = 'select * from lh_categroy';
$query = mysql_query($sql);
while($row = mysql_fetch_assoc($query)){
$columns[]=$row;
}
$fenlei = '';
$fenlei = 'select name="cid" style="width:200px; height:25px;"
option value="0"请选择分类/option';
foreach(getAllOrderColumns() as $v){
$v[name] = $v[level] ? ($v[level]==1 ? 'nbsp;nbsp;|-'.$v[name]:'nbsp;nbsp;nbsp;|-'.$v[name]) : $v[name];
$fenlei .= "option value='$v[id]'$v[name]/option";
}
$fenlei .= '/select';
echo $fenlei;
数据库设计的时候，通常的做法是用父ID来解决树状结构，也有二叉树等等
id pid category_name
然后，用递归就能实现，也有引用数组的方式
?php
/**
* 此方法由@Tonton 提供
*
* @date 2012-12-12
*/
function genTree5($items) {
foreach ($items as $item)
$items[$item['pid']]['son'][$item['id']] = $items[$item['id']];
return isset($items[0]['son']) ? $items[0]['son'] : array();
}
/**
* 将数据格式化成树形结构
* @author Xuefen.Tong
* @param array $items
* @return array
*/
function genTree9($items) {
$tree = array(); //格式化好的树
foreach ($items as $item)
if (isset($items[$item['pid']]))
$items[$item['pid']]['son'][] = $items[$item['id']];
else
$tree[] = $items[$item['id']];
return $tree;
}
$items = array(
1 = array('id' = 1, 'pid' = 0, 'name' = '江西省'),
2 = array('id' = 2, 'pid' = 0, 'name' = '黑龙江省'),
3 = array('id' = 3, 'pid' = 1, 'name' = '南昌市'),
4 = array('id' = 4, 'pid' = 2, 'name' = '哈尔滨市'),
5 = array('id' = 5, 'pid' = 2, 'name' = '鸡西市'),
6 = array('id' = 6, 'pid' = 4, 'name' = '香坊区'),
7 = array('id' = 7, 'pid' = 4, 'name' = '南岗区'),
8 = array('id' = 8, 'pid' = 6, 'name' = '和兴路'),
9 = array('id' = 9, 'pid' = 7, 'name' = '西大直街'),
10 = array('id' = 10, 'pid' = 8, 'name' = '东北林业大学'),
11 = array('id' = 11, 'pid' = 9, 'name' = '哈尔滨工业大学'),
12 = array('id' = 12, 'pid' = 8, 'name' = '哈尔滨师范大学'),
13 = array('id' = 13, 'pid' = 1, 'name' = '赣州市'),
14 = array('id' = 14, 'pid' = 13, 'name' = '赣县'),
15 = array('id' = 15, 'pid' = 13, 'name' = '于都县'),
16 = array('id' = 16, 'pid' = 14, 'name' = '茅店镇'),
17 = array('id' = 17, 'pid' = 14, 'name' = '大田乡'),
18 = array('id' = 18, 'pid' = 16, 'name' = '义源村'),
19 = array('id' = 19, 'pid' = 16, 'name' = '上坝村'),
);
echo "pre";
print_r(genTree5($items));
print_r(genTree9($items));
?