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<?php
/**
* 此方法由@Tonton 提供
* http://my.oschina.net/u/918697
* @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
));
//后者输出格式，前者类似，只是数组键值不一样，不过不影响数据结构
/*
Array
(
[0] => Array
(
[id] => 1
[pid] => 0
[name] => 江西省
[son] => Array
(
[0] => Array
(
[id] => 3
[pid] => 1
[name] => 南昌市
)
[1] => Array
(
[id] => 13
[pid] => 1
[name] => 赣州市
[son] => Array
(
[0] => Array
(
[id] => 14
[pid] => 13
[name] => 赣县
[son] => Array
(
[0] => Array
(
[id] => 16
[pid] => 14
[name] => 茅店镇
[son] => Array
(
[0] => Array
(
[id] => 18
[pid] => 16
[name] => 义源村
)
[1] => Array
(
[id] => 19
[pid] => 16
[name] => 上坝村
)
)
)
[1] => Array
(
[id] => 17
[pid] => 14
[name] => 大田乡
)
)
)
[1] => Array
(
[id] => 15
[pid] => 13
[name] => 于都县
)
)
)
)
)
[1] => Array
(
[id] => 2
[pid] => 0
[name] => 黑龙江省
[son] => Array
(
[0] => Array
(
[id] => 4
[pid] => 2
[name] => 哈尔滨市
[son] => Array
(
[0] => Array
(
[id] => 6
[pid] => 4
[name] => 香坊区
[son] => Array
(
[0] => Array
(
[id] => 8
[pid] => 6
[name] => 和兴路
[son] => Array
(
[0] => Array
(
[id] => 10
[pid] => 8
[name] =>
东北林业大学
)
[1] => Array
(
[id] => 12
[pid] => 8
[name] =>
哈尔滨师范大学
)
)
)
)
)
[1] => Array
(
[id] => 7
[pid] => 4
[name] => 南岗区
[son] => Array
(
[0] => Array
(
[id] => 9
[pid] => 7
[name] => 西大直街
[son] => Array
(
[0] => Array
(
[id] => 11
[pid] => 9
[name] =>
哈尔滨工业大学
)
)
)
)
)
)
)
[1] => Array
(
[id] => 5
[pid] => 2
[name] => 鸡西市
)
)
)
)*/
|
本文转自 IT阿飞 51CTO博客，原文链接:http://blog.51cto.com/itafei/1873332
