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无限级树状图可以说是无限级栏目的一个显著特征,我们接下来就来看看两种不同的写法。( @% W) V2 L+ t) c0 O& I/ B( C9 g
一.数据库设计
6 T1 R9 A! r) n- CREATE TABLE `bg_cate` (
+ m$ c5 d$ ~9 l+ [8 h+ I+ z - `cate_Id` int(30) unsigned NOT NULL AUTO_INCREMENT,
; t. _9 @5 i! [4 S: g - `cate_ParentId` int(30) unsigned DEFAULT '0',1 `$ L2 {1 c! K' w, m# ^
- `cate_Name` varchar(100) NOT NULL,
2 e# a7 E8 @0 c - `cate_Intro` varchar(500) DEFAULT NULL,
, G; ]% t2 D0 x1 k% W) f" y* | - `cate_Order` int(30) unsigned DEFAULT '0',
9 M. j" w! o7 z0 b& | x( Z! A" H8 p - `cate_Icon` varchar(100) DEFAULT NULL,8 _1 }2 B- `) h* p+ Z- Y
- PRIMARY KEY (`cate_Id`)# H7 F( L+ G* \! w' ]& b
- ) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=34 ;
* e; A' R9 u( H# e, ]) H - --
! e2 ^1 u* ?# {1 q3 I/ b# j - -- 导出表中的数据 `bg_cate`( e; K: h% |) Z* q1 K$ U
- --1 b" u' _4 {% i
- INSERT INTO `bg_cate` (`cate_Id`, `cate_ParentId`, `cate_Name`, `cate_Intro`, `cate_Order`, `cate_Icon`) VALUES
) Y) [5 P. W' { - (4, 0, '往事如风', '记录往事', 0, 'icons/6.gif'),) O6 C6 `4 u7 }7 e+ O" I1 J: r
- (5, 0, '水煮三国', '品位三国智慧', 0, 'icons/3.gif'),9 a" ~/ s/ H) E: |- c4 L
- (2, 0, '技术学习', '平时学习的一些笔记,欢迎批评指正。', 0, 'icons/18.gif'),
) b5 h q7 X. v% z - (3, 0, '生活点滴', '记录生活点滴', 0, 'icons/2.gif'),
{* k4 b, Z, D5 f - (6, 0, '栀子花开', '青春无限', 0, 'icons/8.gif'),
) b- T5 f9 R- e& N& V8 A% Y - (7, 0, '假日休闲', '悠闲、自在', 0, 'icons/24.gif'),3 n* c+ c4 r: {* e Q
- (8, 2, 'html', 'html学习', 0, 'icons/1.gif'),, z5 V+ p7 V* b/ X1 h
- (9, 2, 'css', 'css学习', 0, 'icons/1.gif'),# N+ G o: r: E: M" k+ w O
- (10, 2, 'php', 'php学习', 0, 'icons/18.gif'),
/ y9 a7 C- F$ V6 a/ H* { - (11, 10, 'php基础知识', 'php基础知识', 0, 'icons/1.gif'),9 a+ \: X W# d6 s# F
- (12, 10, 'oop', 'oop', 0, 'icons/1.gif'),
8 f0 d% b3 c. ` - (13, 10, 'php安全', '讲述php安全', 0, 'icons/1.gif'),
% c: t/ \: c' p1 c - (14, 10, 'seagull framework', 'seagull framework', 0, 'icons/1.gif'),* N, d8 @% X, X
- (15, 2, 'javascript', 'javascript学习', 0, 'icons/1.gif'),/ H' j8 r7 _7 a. B! y! d/ y
- (16, 2, '设计模式', NULL, 0, 'icons/1.gif'),3 H+ H* o3 A/ @ I" ]: b) T8 ?5 `6 k
- (17, 2, '软件工程', '软件工程学习', 0, 'icons/1.gif'),
' C# l ^( e5 J - (18, 3, '厦门生活', '厦门生活', 0, 'icons/8.gif'),( l" {3 O1 W' D6 p8 m& X
- (19, 3, '大学生活', '大学生活', 0, 'icons/8.gif'),+ G' B+ x% B* v' H3 Y
- (20, 3, '童年生活', '童年生活', 0, 'icons/15.gif'),
6 n$ l& }6 h D# T1 Z4 f/ p - (21, 19, '学习', '学习', 0, 'icons/1.gif'),
- S/ [0 ]1 j+ n5 F2 \ - (22, 19, '运动', '运动', 0, 'icons/16.gif'),1 P7 f( u/ \$ o, @6 p
- (23, 19, '旅游', '旅游', 0, 'icons/24.gif'),) _" x2 k/ s! R7 `2 G5 B$ ]
- (24, 22, '排球', '排球', 0, 'icons/9.gif'),
- \1 b* B/ J6 i7 }: U9 e. f - (25, 22, '篮球', '篮球', 0, 'icons/9.gif'),
3 c I- |2 f$ s# _, F' \5 r - (26, 22, '羽毛球', '羽毛球', 0, 'icons/9.gif'),
K' |+ r, b5 U2 l - (27, 22, '乒乓球', '乒乓球', 0, 'icons/9.gif');
复制代码 二.到数据库取数据,放到数组。
5 G8 m7 f. G' q- require_once './classes/MyDB.php';
, L' M8 S# n0 E5 ~3 Y9 W - $con = MyDB::singleton();
. B0 T& C3 K. s+ K - $sql = <<<SQL
3 t9 |: @0 i- D& M# J1 u - select * from bg_cate cate
, d* @' B2 }$ E - SQL;, }, H1 [, U& ^8 x& H& J. o3 y
- $data = $con->getAll($sql);. f, W: d: L' x
- //print_r($data);
复制代码 数据库操作我用的是pear类库。# P3 p- F6 j/ b( w- D( g& n
最后的$data的数据格式如下:
( t4 J0 C0 `3 J( {3 Q5 T8 D- Array7 C( H( K; z3 m- Z3 s
- (
! w2 O3 v- G/ {' o - [0] => Array8 }8 T- b$ m: h
- (" t( d5 a, {9 h$ i: \
- [cate_Id] => 4! Q4 {9 F1 f: ]
- [cate_ParentId] => 0
& c1 X/ k, I& c, ~) X - [cate_Name] => 往事如风
) f J7 k% V1 {9 ?. t" Y! W, e+ H - [cate_Intro] => 记录往事
9 m0 X* R3 H5 T+ |0 q - [cate_Order] => 02 _' h" H$ k+ \; C% }0 J
- [cate_Icon] => icons/6.gif8 o- X# a# q, d* ]
- ); e) i! ~+ Q5 M9 u6 @# c
- [1] => Array- e7 s1 E6 M5 y3 X
- (8 ^$ v4 w' S; Q8 b
- [cate_Id] => 5
2 d* \7 k+ W8 g$ L; y" `: d - [cate_ParentId] => 06 V8 j1 a1 I" u' s
- [cate_Name] => 水煮三国
2 X; {! G; ~! Z6 }5 f/ v - [cate_Intro] => 品位三国智慧
/ X( o6 ]/ D1 {4 [& V - [cate_Order] => 0
6 m* i( S7 p2 s* q) X- Z - [cate_Icon] => icons/3.gif
! _2 [1 D8 t @5 \ - )
复制代码 三.把上一步的数据转为树型状的数组
) K# j3 K8 a( D. _) l9 `# g/ V代码如下:
' h' v$ ]$ {" e! i" H- }2 }) c- function getTree($data, $pId)
% ]' J Q& ]3 Z* | - {0 G. p$ l4 l ?4 d+ x' @
- $tree = '';: T9 {( N- x0 L* |5 ~
- foreach($data as $k => $v)
5 d% u* ^1 V7 x, {) [& \) Q+ f - {7 l: V" o% l; A; s1 h7 K; G
- if($v['cate_ParentId'] == $pId)
y& ~" `# D g4 ^ - { //父亲找到儿子
& f! t6 E* L. ?4 @( [8 _# l - $v['cate_ParentId'] = getTree($data, $v['cate_Id']);5 e4 L0 }( l- Y: S9 u$ r' }
- $tree[] = $v;
* m- U& ^. K1 V! ?. s. D; O! G - //unset($data[$k]);
* r9 [; T# e! m& X* I3 K - }; n+ v/ d. l, E% ~) s
- }2 I a8 T4 W# n
- return $tree; }/ D, K$ k& U
- }* m# F2 f0 P3 J
- $tree = getTree($data, 0);
复制代码 最后输出$tree的数据格式为:7 P. C5 o1 N1 n8 s
- Array
; ~1 {- J+ t* l. C; m - (
! i( w5 ^' [! H4 e; w. v1 P, k - [0] => Array# V) e$ X( Q( w$ K1 D8 E/ G
- (! U7 ^/ l) F% p& i
- [cate_Id] => 4
- i% T' M* E3 k - [cate_ParentId] =>* [2 W7 M" y9 J$ C
- [cate_Name] => 往事如风
9 @3 O6 {* `8 ~0 s3 P" l/ p1 x - [cate_Intro] => 记录往事% s1 M7 L% o7 `8 j
- [cate_Order] => 0 n4 k% ~; Q j. t
- [cate_Icon] => icons/6.gif9 m8 V' Q/ H8 f
- )5 q& U7 T/ p+ {6 k* ~
- [1] => Array
; P& E$ M# x4 D" Z. y - (9 H/ Q/ `4 P3 S8 M
- [cate_Id] => 5! x7 c% `$ @0 Y6 E) Y# `9 [/ C
- [cate_ParentId] =>
9 k* Y2 P, ~' o7 [$ ?( \ - [cate_Name] => 水煮三国
! T m3 M1 W$ z# f - [cate_Intro] => 品位三国智慧
. F' D0 ^; B. P4 q. b5 h+ p Z - [cate_Order] => 02 Y' x' K7 p+ {" V: H3 b) \ h
- [cate_Icon] => icons/3.gif
1 i) X# d0 T4 J! W) k6 {& q - )
# O5 J- R/ N) m5 v3 p - [2] => Array
( c {. o+ M9 J, v - (
& Z4 Y5 l. H7 p. Q* m1 c - [cate_Id] => 2
3 s$ S- O5 r# [2 g! z. D - [cate_ParentId] => Array8 p7 |! A3 h/ `# S8 x/ z3 X% ~
- (8 X9 `/ S2 Y2 _6 P2 ~+ m
- [0] => Array- k, I- p& U4 x/ \, b8 N
- (/ ]) b5 g/ a. {2 O0 m
- [cate_Id] => 8& M0 C$ j, v3 S
- [cate_ParentId] =># I: W7 h7 a% i6 Y5 ]8 ^9 _
- [cate_Name] => html
1 e5 C$ X" f) } - [cate_Intro] => html学习" l; `6 q5 R ], e
- [cate_Order] => 0. ]# ~4 i) h% [7 H1 U
- [cate_Icon] => icons/1.gif
2 k t! H1 J2 E - )
复制代码 四.把树型状数组转为html5 S6 l( T+ x$ ?
代码如下:3 R {0 {5 ~! X% B0 [& a
- function procHtml($tree)9 E! k$ @. o6 c' Y
- {0 \, j7 @% @* o, Q! {. ?
- $html = '';" D, G( I/ ^8 n/ |. I0 @& d
- foreach($tree as $t)
4 G* N" K' `7 F2 n) _9 ]$ o - {
1 Z: a0 A0 r# ~: Q' |$ q/ v6 } - if($t['cate_ParentId'] == '')
, J2 f. ?9 C$ z5 ^# L" ` - {
' O3 h3 Q: \) R) V - $html .= "<li>{$t['cate_Name']}</li>";
) x0 ], B6 P2 T! P. j - }
1 y: ~7 n8 Y+ s6 o% m - else% J) q% @9 a, ^% z' X
- {. s) N: D' G3 ?( l* K" `4 { N' d
- $html .= "<li>".$t['cate_Name'];
4 c C/ |* R/ H D1 c) C - $html .= procHtml($t['cate_ParentId']);. u! M% N1 g4 k: u2 k
- $html = $html."</li>";
" b* V2 _3 u6 R% I - }
1 j& C; S& }1 I) p2 X+ W - }/ H0 m2 p0 ]/ _0 P3 y2 `
- return $html ? '<ul>'.$html.'</ul>' : $html ;
" ~* J% @5 k+ Z+ [. A% w4 H - }' X1 t& m6 ?% B
- echo procHtml($tree);
复制代码 输出的html的代码格式为:( e# I; y. ~$ s; J5 |4 g
- <ul>
* y1 \. B4 P( `+ F - <li>往事如风</li>
8 y0 ~+ g- ?- K) K5 } - <li>水煮三国</li>; E" W/ s/ Z: j
- <li>技术学习
" v8 R! Y; h. O5 O$ b( u y4 V* I - <ul>, S3 J% H; O8 Y0 ^( ^/ y
- <li>html</li>. j* I( a! K+ ^2 ]# o/ x' A( S
- <li>css</li>
4 j1 `* S3 D& l) ]: S6 w+ T6 \7 F+ d - <li>php
: |. v4 m3 s3 X1 R - <ul>
3 L1 x R& G# a# ^9 L7 G6 y - <li>php基础知识</li>
* G+ P# i9 q+ K. _( H0 }4 { - <li>oop</li>
4 z, {) _* W6 z - <li>php安全</li>
复制代码 五.代码整合
" [: J2 e% s0 ?: w- function getTree($data, $pId)& u5 N% T. {+ c/ e
- {8 _* C2 R' c8 t& Z5 g
- $html = '';' A8 Z" z4 }0 S5 c& o3 P, o8 `4 c% m
- foreach($data as $k => $v)0 R" ?0 j. ~4 y9 T2 `( e7 L
- {
. _# L6 c4 i; V l( r( w - if($v['cate_ParentId'] == $pId)
+ {6 D4 M# j* Z* J: K0 P: J - { //父亲找到儿子
( A& ~! n1 r( k5 { - $html .= "<li>".$v['cate_Name'];
! W; D* t" l3 @% @- R# J' p. @ - $html .= getTree($data, $v['cate_Id']);
# Y: t# Q; i: _: d B+ T9 c9 z - $html = $html."</li>";
9 l5 n9 K* Q; T - }/ \; c9 R; P! N, p
- }7 x) e; F- G7 `8 Q' V( P
- return $html ? '<ul>'.$html.'</ul>' : $html ;
# n) |# H" h0 K& W% [ - }
% o. E5 v' f1 F: x - echo getTree($data, 0);
复制代码 六.增加CSS样式
% v: V8 \6 @+ T) n0 I
. Q8 R5 _6 s, g+ P1 p9 @ f) |
: M. Y8 W3 q% i, I0 W第二种是从开源网站上看到的,非常非常的简介。
$ n6 p8 ^0 j: z- <?php; f! R6 e0 l- _1 v- m& n: b1 r5 s
- , \1 h3 ^& L. D% |( f$ E' b+ r' D% x
- function genTree5($items) { / p3 W! u* J5 s. g
- foreach ($items as $item) " t2 S- K5 P6 T
- $items[$item['pid']]['son'][$item['id']] = &$items[$item['id']]; $ U' J, C5 d! X s5 u$ l
- return isset($items[0]['son']) ? $items[0]['son'] : array();
/ k* a+ v2 {: k0 U' L - }
4 p* K* A5 a2 N- D6 q2 ^* i -
1 w# R6 u4 @2 b - /**
/ o5 Q# ]. U6 q# I0 a* v - * 将数据格式化成树形结构' q2 F! y1 x# j, ]# q+ Z/ C
- * @author Xuefen.Tong
) a9 P7 _8 h3 F0 X, l - * @param array $items4 {6 @$ m/ w' M3 H# O% W
- * @return array 7 `2 ]! g7 h6 W( W4 @" a
- */
& \9 H# I/ e4 j - function genTree9($items) {
0 M' C7 M l% q1 p) P5 \. T - $tree = array(); //格式化好的树
: }) X' I& h7 |. w - foreach ($items as $item)
' d& {3 E8 z' r - if (isset($items[$item['pid']]))
, k; s6 S' a5 j7 a3 j& l: k( I - $items[$item['pid']]['son'][] = &$items[$item['id']];
# [) z9 a$ M! O) u$ d4 Y - else
8 B2 ?7 A \8 B+ y* I - $tree[] = &$items[$item['id']];
3 ? t1 T. e4 h! J+ [* H5 D" B - return $tree;, Y8 |) K0 N3 g& |1 b, y
- }
* Z. X' `8 v- u - % S) ^8 Q5 N7 u0 o ~1 w" e; ^
- $items = array(
9 D( S! e0 W+ E2 ~ - 1 => array('id' => 1, 'pid' => 0, 'name' => '江西省'),' g. e- u/ u5 r
- 2 => array('id' => 2, 'pid' => 0, 'name' => '黑龙江省'),
; T$ M: U6 B4 }6 g - 3 => array('id' => 3, 'pid' => 1, 'name' => '南昌市'),' @% h* j" x' ~' j
- 4 => array('id' => 4, 'pid' => 2, 'name' => '哈尔滨市'),
/ r+ M/ a+ F- ~$ F - 5 => array('id' => 5, 'pid' => 2, 'name' => '鸡西市'),
5 L: I4 S: G% m1 T: [$ L4 F+ T# d) h - 6 => array('id' => 6, 'pid' => 4, 'name' => '香坊区'),
/ ^9 c; ^8 [6 W. n4 B, u1 d/ t) ? - 7 => array('id' => 7, 'pid' => 4, 'name' => '南岗区'),
& S; L2 Z* R" Z( c% w - 8 => array('id' => 8, 'pid' => 6, 'name' => '和兴路'),
, A( z3 d! f1 j. @0 ~ - 9 => array('id' => 9, 'pid' => 7, 'name' => '西大直街'),
" z8 A4 m+ |3 d, p - 10 => array('id' => 10, 'pid' => 8, 'name' => '东北林业大学'),
: @, o5 z) P, g7 ] - 11 => array('id' => 11, 'pid' => 9, 'name' => '哈尔滨工业大学'),
& o; F% u% @5 Z6 J7 Z! F - 12 => array('id' => 12, 'pid' => 8, 'name' => '哈尔滨师范大学'),) b* D/ ?' `& o3 O: z
- 13 => array('id' => 13, 'pid' => 1, 'name' => '赣州市'),
1 P% K0 \, Y5 ]5 Z6 f- O, y2 H+ ] - 14 => array('id' => 14, 'pid' => 13, 'name' => '赣县'),) W/ \5 D, W6 g8 Y
- 15 => array('id' => 15, 'pid' => 13, 'name' => '于都县'),: G5 k* L# x& [7 F3 {- a
- 16 => array('id' => 16, 'pid' => 14, 'name' => '茅店镇'),+ L* ^- j3 v# Q, B d
- 17 => array('id' => 17, 'pid' => 14, 'name' => '大田乡'),' V% q4 V: {% G
- 18 => array('id' => 18, 'pid' => 16, 'name' => '义源村'),0 D7 G2 d% Z; c
- 19 => array('id' => 19, 'pid' => 16, 'name' => '上坝村')," L, C2 v0 h( A2 D$ _3 X+ R$ _
- );7 j& t( q0 d8 J! r% d3 t2 F; K
- echo "<pre>";( k% o) y* Z; Q* N3 S7 u
- print_r(genTree5($items));
. h, Y' h- N, l - print_r(genTree9($items));# H. S* D# O5 ~6 d3 N! b) w
-
# H* @. D, R$ L - //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2 o9 C+ H- g" S1 @$ B2 q$ ?: ~) e) j
- /*
) S* X8 Y- h( J - Array
1 ]3 e' _9 i) `; I/ K- M2 ]$ e - (
0 [5 Z; ^9 o! G1 n - [0] => Array, u& b% R4 q0 l$ J& _! m
- (" H0 i: F6 @& C- Q
- [id] => 1
9 b2 p1 y9 P, |# T& V0 E' q - [pid] => 0; q& O5 x! I2 z
- [name] => 江西省% }6 J3 G4 t" h1 B: S0 G$ `1 ?
- [son] => Array1 h, f x" f% z- @8 t
- (8 L3 W, @, _( ]9 W: E; [4 I
- [0] => Array
. K4 b9 @. r ~/ p0 \& K - (
0 m* Q. q9 N9 u4 O# q - [id] => 3" R$ _) y- E3 S: C
- [pid] => 1
6 T& ]7 [3 i8 e* t3 K3 l; e - [name] => 南昌市
0 \% k" S5 k% j" _! A$ D - )
" B/ K3 V# T5 a8 l -
% |7 H2 ~* P' Z( L) A5 e& n: w) Z - [1] => Array; W2 d* W% j1 |3 k# x# ^- D! U
- (
: A' F( L* X0 ^4 C - [id] => 134 r+ ?( V# R5 m1 O9 C5 v& }, ^
- [pid] => 14 i# r* I/ x7 G) W$ l
- [name] => 赣州市
* u+ t( {& `- h! ~" w+ k$ J - [son] => Array
+ w/ @. r4 a8 w" @/ |6 ^ - (
, V, W$ ~$ z/ l* w" _ - [0] => Array5 {' E; A7 X) L( F: n6 W
- (; w9 c4 }8 b- |& ]
- [id] => 14
6 X9 o( z/ ^# u7 C1 e- ~4 o - [pid] => 13" T4 g! ` H: X' F1 J& W
- [name] => 赣县
& t+ ?2 c9 m- F: n; C( ` - [son] => Array
3 D7 D4 _5 j) f5 _1 q! I - (+ ~" p$ n9 w$ j' I" K- c
- [0] => Array
+ W6 ]. s8 M! J) Q7 t - (2 t# p' O0 r; G( S/ E& O
- [id] => 16: {& {% W; ~ d' P
- [pid] => 149 H, |- h. h }1 q" k
- [name] => 茅店镇- B- F6 {% f/ l4 k5 [* ?
- [son] => Array( D3 U$ g; \3 y
- (4 M7 G" H( u' W# X- E
- [0] => Array0 R4 } i) @0 f! w+ Z) U) w7 M
- (
, ^- g; C# p m4 N - [id] => 18
4 B1 T, E/ E7 B# k - [pid] => 16
$ U1 U' I" K7 {; d3 L# G( T - [name] => 义源村
2 r% P! P3 r8 {" z! q - )
9 t$ d: B% _2 r( G -
7 z0 y/ X* k u+ u) L2 W - [1] => Array
% m. r1 k: q* R2 T" j - (; c* j2 ~$ A( P5 i$ X6 M
- [id] => 19- }% V; F: `" t( E& C% h1 H
- [pid] => 16
' g% t0 m% v2 g) [6 X3 B: c' d - [name] => 上坝村
) `& a) Q5 o/ [* s# L8 u2 a - ): s' f# |6 a( B) c
-
5 e: c# I! J- w o# Y; _; @ - ): L% n( j; D- M# i0 l6 V' _
-
/ N/ P! {& G1 p1 a2 X6 v/ x' S2 R - )# _7 K4 N0 w: T# B
- : n/ s8 C$ G+ Z" d1 o1 M6 ?# R
- [1] => Array3 ^+ u4 q) Q3 G+ b
- (9 @& W) X. l. p) \+ i% w
- [id] => 17/ D3 l# p* E, X2 R0 I1 Z' H3 |% y: F
- [pid] => 141 A+ t6 h9 b. ]% a# v: }, q
- [name] => 大田乡
. N5 M% G# n9 w- a - )
6 C3 ^) O* E. z! @6 ^ - # G d# U& h2 j9 S2 e8 p, X4 x
- )
* f2 Q1 l/ J4 g - / {. a/ e, N X8 h% Y
- )
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- [1] => Array
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- [id] => 15
) Z4 y0 Q# N" O0 z- e6 N2 U7 p% e - [pid] => 13
+ \& Y; Y- u5 z, ?* h* x - [name] => 于都县4 |8 y6 ]! S! k) M. a. v' U# b
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- [1] => Array) z% z+ u+ s" e1 P
- (
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- [pid] => 03 g8 f2 C7 V& V: h1 ?8 d+ `
- [name] => 黑龙江省* @: T) N$ \ |* [. d
- [son] => Array
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- [id] => 4 u7 d. u9 d1 P: \1 N% Y
- [pid] => 2
, O' x1 c; G- y; ~: I- J6 n - [name] => 哈尔滨市
7 m5 [5 R U& ]2 K, c2 R3 }+ X - [son] => Array, }; h8 J8 v7 f/ I# E
- (8 R! }. P/ f+ l5 j" ?! F" s! B
- [0] => Array2 X r9 G9 q x9 p1 k5 _+ u5 P
- (; S9 Y) k( u! Q
- [id] => 6
' [2 ^9 }3 D: t2 X) q4 W2 P4 B - [pid] => 4
* Q0 V1 h( q2 z - [name] => 香坊区
/ R, \! L+ x1 ^0 w. y$ U ^1 t( d - [son] => Array# \2 {- A4 e/ z: [
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- [0] => Array
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- [pid] => 6' I+ N2 N: x: C6 X
- [name] => 和兴路% W) y8 a2 p" J
- [son] => Array: g% P* Q& H; E- e ` X" h8 z
- (% x# u, E1 h7 \" ?: h2 p7 Y# U. F
- [0] => Array
2 O" }; F1 x$ d4 l7 a7 c' k) j - (: c0 a1 q1 x5 L3 @
- [id] => 10
$ ?5 f& p( i1 v; i5 ~, K - [pid] => 8
' @% S; w* d! X7 U - [name] => h. ~2 J2 t7 }
- 东北林业大学+ ]& ]# X/ k) m! B% d, t \7 W8 P
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- [pid] => 8& I* L- e; i ~ \6 A
- [name] => # ?0 s! N3 F( ^" d, J1 I
- 哈尔滨师范大学5 a; N4 f4 F# Q8 H
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- [id] => 7- W* Y/ |7 P" w" [
- [pid] => 48 x' N# ]% h& w5 L
- [name] => 南岗区
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% ^! C/ `4 g" }6 n7 ^ - [id] => 9
3 ]3 e" P0 Y" Z2 N! [ - [pid] => 7" ]% G8 @8 g" z# m) e
- [name] => 西大直街; f! i. E; \7 H1 \, ?9 l9 B
- [son] => Array" I* P0 F, ^+ Z1 I( U" X
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/ S' n+ A9 B5 G+ ^4 d5 Q. ^ - [0] => Array7 X8 _' ]- Q, B
- (8 }- [# a% i2 F" v( b2 G; [
- [id] => 11 p8 ^) u- J5 s" |2 t& H
- [pid] => 9
. @4 v4 u/ }$ b9 b a! @& P - [name] => 3 v1 t1 E" l8 [! }1 J1 W; N; o
- 哈尔滨工业大学
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- [id] => 5
3 S, F m8 w3 k8 m2 b - [pid] => 22 ]1 x. F- {: F/ K" f2 G' I. h6 F
- [name] => 鸡西市
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复制代码 可以看出第二种代码只用了5行代码就实现了无限级的分类树,非常值得大家的借鉴和学习。
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