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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。6 q5 ^( K& m9 \7 ^8 _3 I4 b% l. q
一.数据库设计! ?. ?+ U& p# {2 I+ H
- CREATE TABLE `bg_cate` () d4 k Y3 ?" r
- `cate_Id` int(30) unsigned NOT NULL AUTO_INCREMENT,
5 z. c1 H" x1 R9 K% m, l3 e - `cate_ParentId` int(30) unsigned DEFAULT '0',1 G! |* H: i' I* O3 D* [* v& Y
- `cate_Name` varchar(100) NOT NULL,
) z4 M- ~/ ~( g. b - `cate_Intro` varchar(500) DEFAULT NULL,
# `7 b$ U5 d& c1 `( d- j0 Q - `cate_Order` int(30) unsigned DEFAULT '0',
4 ]' E- v z5 U - `cate_Icon` varchar(100) DEFAULT NULL,
- \7 a& S/ m. v R! h - PRIMARY KEY (`cate_Id`)
7 h; O. I6 Q) T4 B5 z3 F - ) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=34 ;
5 n; S8 g8 P# I/ V0 e* F" y - --' ^( G. h) j; ^( ]' _: w
- -- 导出表中的数据 `bg_cate`" G$ e/ R# I7 d
- --1 \/ a( P% Y' c
- INSERT INTO `bg_cate` (`cate_Id`, `cate_ParentId`, `cate_Name`, `cate_Intro`, `cate_Order`, `cate_Icon`) VALUES! r$ n5 [1 n( t- |# \% |3 z
- (4, 0, '往事如风', '记录往事', 0, 'icons/6.gif'),: y k* W! p/ P* Y; J6 Y
- (5, 0, '水煮三国', '品位三国智慧', 0, 'icons/3.gif'),
9 F! D6 R" m" B6 I0 ]! b4 N9 V - (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'),& a" Y. a; `$ Q; q9 y; R
- (3, 0, '生活点滴', '记录生活点滴', 0, 'icons/2.gif'),
+ C, n" L. E* `- B9 f( K - (6, 0, '栀子花开', '青春无限', 0, 'icons/8.gif'),
: A5 Z h7 B7 h* N1 U3 C" C2 J - (7, 0, '假日休闲', '悠闲、自在', 0, 'icons/24.gif'),+ Q4 e; P' q" d
- (8, 2, 'html', 'html学习', 0, 'icons/1.gif'),: ]% N" k* f$ v% R& v( V* \, j' I0 O
- (9, 2, 'css', 'css学习', 0, 'icons/1.gif'),5 S+ ^$ p! p+ K- I/ T
- (10, 2, 'php', 'php学习', 0, 'icons/18.gif'),
) U$ @( s0 z$ u; U - (11, 10, 'php基础知识', 'php基础知识', 0, 'icons/1.gif'),
. I4 t2 ?+ q% N - (12, 10, 'oop', 'oop', 0, 'icons/1.gif'),
& W t1 i( _$ Q" F0 Z! \( k2 G1 j - (13, 10, 'php安全', '讲述php安全', 0, 'icons/1.gif')," j7 [4 i" k+ |) [, ~/ m6 a
- (14, 10, 'seagull framework', 'seagull framework', 0, 'icons/1.gif'),
8 e8 ^$ N* p, F) p' D - (15, 2, 'javascript', 'javascript学习', 0, 'icons/1.gif'),$ h! ^$ E% k& ^1 l3 f
- (16, 2, '设计模式', NULL, 0, 'icons/1.gif'),% D. X6 Y. D; [8 ]' F( V9 G
- (17, 2, '软件工程', '软件工程学习', 0, 'icons/1.gif'),9 m! Y7 L9 z& X- {% g
- (18, 3, '厦门生活', '厦门生活', 0, 'icons/8.gif'),
# w3 b2 d, [2 ?, b. D7 ^3 A! M - (19, 3, '大学生活', '大学生活', 0, 'icons/8.gif'),/ m% a3 a% w& Z; m8 J l( P7 c6 Q' h4 h
- (20, 3, '童年生活', '童年生活', 0, 'icons/15.gif'),* Y0 O. v! J2 S i o# [
- (21, 19, '学习', '学习', 0, 'icons/1.gif'),6 R( }6 n8 v" Q7 i P/ V
- (22, 19, '运动', '运动', 0, 'icons/16.gif'),
/ Q$ r' J- D7 F. r* J - (23, 19, '旅游', '旅游', 0, 'icons/24.gif'),
" E: G" J% w7 T0 U3 n - (24, 22, '排球', '排球', 0, 'icons/9.gif'),2 T3 Q( q) Y7 T( B
- (25, 22, '篮球', '篮球', 0, 'icons/9.gif'),9 ?1 I( c$ T2 H$ I1 X
- (26, 22, '羽毛球', '羽毛球', 0, 'icons/9.gif'),
; j) d$ m( D2 G* n( q" X/ M/ ^$ e - (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。
' R% |+ |* b( m* Z4 J$ t( ^/ J# S- require_once './classes/MyDB.php';
8 L2 I9 ^- U3 }$ P8 S+ p0 `: @9 ? - $con = MyDB::singleton();$ h; t% p0 K& E4 [8 b7 N F
- $sql = <<<SQL5 M& f* u: |8 m% u4 ?
- select * from bg_cate cate1 Q2 y% s V: v4 O J' y% R- F
- SQL;, F6 Y7 ]7 `& I* A. d, c. U
- $data = $con->getAll($sql);! H9 F! B$ z% ]3 A. D
- //print_r($data);
复制代码 数据库操作我用的是pear类库。0 l% U4 t8 N r
最后的$data的数据格式如下:
" E% l, |$ {8 R' {- d! v% G- Array% z6 a. s4 t* }- R+ \6 V$ Y
- (6 X, P3 Q* Q) I" F
- [0] => Array
$ h" O2 k, |' i/ c' @9 F" W- `: | - (1 X7 L* Q% D) s+ W- q
- [cate_Id] => 4/ _$ D% w) R& v4 v; L- a/ j' | Y
- [cate_ParentId] => 0
$ A# \; n7 ^6 D& o, r2 ~ - [cate_Name] => 往事如风
5 b" ?( X$ H# {) [ v3 x4 H% N - [cate_Intro] => 记录往事- M8 Z9 S! p1 q& ~+ I2 |' A& q
- [cate_Order] => 0& |" G$ Z' g1 o4 [8 {# K2 t
- [cate_Icon] => icons/6.gif' W3 f3 [3 J, K8 n) @
- )
$ {, A& s) }( |; ? - [1] => Array& p/ X8 k% e4 l$ i
- (
( d2 \3 n( Q D' b& I - [cate_Id] => 5
3 ]+ K4 x& ~4 l6 W9 h. S - [cate_ParentId] => 0, x3 e3 v# P5 A, Y
- [cate_Name] => 水煮三国" ^: t m4 ?; Z! o- y3 e# \8 W2 q
- [cate_Intro] => 品位三国智慧
D3 h+ \+ P b m: s Z - [cate_Order] => 0% p; I5 Z( {. x. f
- [cate_Icon] => icons/3.gif0 C) F1 @) Y6 b, f8 ^
- )
复制代码 三.把上一步的数据转为树型状的数组
6 t( ]( B! f' X. J1 \4 h2 Q3 D代码如下:& k1 o2 ~' _/ |! {' \) v# p
- function getTree($data, $pId), o6 G$ x) `) |% Q1 [% @
- {
5 O8 X& @& d% l ~ - $tree = '';/ v- J, Q2 \5 p+ w: p
- foreach($data as $k => $v)
) h. |1 \5 L2 D2 V - {
# B& X; |6 } Z; V: E - if($v['cate_ParentId'] == $pId)5 m1 ~; K! m7 H4 }
- { //父亲找到儿子7 J# g* y; P _ H' J
- $v['cate_ParentId'] = getTree($data, $v['cate_Id']);, l' [# x9 s$ {# |2 @$ a5 [. \: _) K
- $tree[] = $v;
% E/ r' B* |1 ? `5 e, O - //unset($data[$k]);
" r m( J/ P) p - }
$ ~4 e4 z9 A! Z: J$ x - }
3 ?4 s, w' S9 u" I8 f3 [ - return $tree;. P) ?2 l/ i2 R, x$ }0 ?# m
- }( l& C: J. ~3 K9 p! e
- $tree = getTree($data, 0);
复制代码 最后输出$tree的数据格式为:( ]% {) L q* ]4 S+ y# V8 n2 t
- Array
! X0 r- O4 D) n3 E. ^ - (
, C( ]( i v3 K - [0] => Array
* r5 B. g7 A" x5 K. Z- }5 x - (
2 _6 Y X2 ~! R7 B; _ - [cate_Id] => 40 K1 z' l+ S! U4 ^9 e
- [cate_ParentId] =>5 T. K z9 t% N. Z6 n3 P
- [cate_Name] => 往事如风: {9 r5 E" ]0 C. n# e- g7 M
- [cate_Intro] => 记录往事
. W6 S; n# w9 G9 a) e/ f6 { - [cate_Order] => 0
- w8 g& ^5 [; v5 V - [cate_Icon] => icons/6.gif
z% c0 V F) m* C - ) U3 W8 d5 R E( j3 h: e
- [1] => Array
6 `) M8 z* T; x: U) M& d8 L - (% T9 J" F9 Q* P# P4 y4 ?8 ?& l
- [cate_Id] => 57 I! b E3 [: n4 x2 X/ A5 T/ w
- [cate_ParentId] =>
, q. C" [* U# T9 d - [cate_Name] => 水煮三国+ e1 q6 {' i5 k, s2 D" j
- [cate_Intro] => 品位三国智慧' ?3 p- O4 }" L' N2 r
- [cate_Order] => 0
" V/ m& g7 S# Y) { }( f- ? - [cate_Icon] => icons/3.gif- o5 w e/ F$ {/ f: Z
- )
2 X' |; S! x# N! g0 d9 N2 Q( ^. M& S - [2] => Array4 G% L7 l+ m3 y* H n
- (
# A3 s/ z" {8 S - [cate_Id] => 26 V8 }8 p% E/ P2 t$ y+ v
- [cate_ParentId] => Array
) B0 S/ }6 a8 Y7 l. l T - (
2 T: @( Q9 C5 d" r" j - [0] => Array, I: Z2 A; P, G; H2 ?, g
- (+ c% u& V( x6 ~6 _
- [cate_Id] => 8
y( Q% s+ H6 p. I. e4 C. F - [cate_ParentId] =>
8 i0 V: Y% R: D - [cate_Name] => html
' {6 a; l0 S" }; m - [cate_Intro] => html学习
6 |; t2 O! y. `6 T) O - [cate_Order] => 0
0 @1 g" Y9 @- F3 T% |6 Y+ e - [cate_Icon] => icons/1.gif# S7 p* p/ |' F( w9 k/ J( Y U
- )
复制代码 四.把树型状数组转为html
7 l% i- R# D$ V0 G, o代码如下:
/ K. L6 W/ R& ^. G# Q% z" W- function procHtml($tree)
7 M1 x" b% U7 G+ ?! Y& E - {
+ A8 g3 y, N% E" j& P - $html = '';6 y8 L" _/ u) X4 @' c3 G" v
- foreach($tree as $t)- g) S" p. e5 \8 G
- {
# g6 L+ j$ { ^. z. P9 E8 C - if($t['cate_ParentId'] == '') x: s) ], p) S3 X. O* F3 g
- {
. h2 z$ W* Q+ }" A A5 E8 { - $html .= "<li>{$t['cate_Name']}</li>";4 I6 \+ E* B, T
- }3 L+ P7 v n! @$ i0 M, h3 Z6 x1 p
- else+ G8 [& T2 K3 c! t+ p) i. S
- {
: [7 Q& l$ a) T9 A& l - $html .= "<li>".$t['cate_Name'];3 j3 K9 Q5 i# F r# ]" j
- $html .= procHtml($t['cate_ParentId']);; N( |2 b: v4 p# }8 |" q$ S
- $html = $html."</li>";: X) m+ f; q2 F
- }1 D1 f2 {4 g" m% i
- }
' T# }! ?+ e) q6 c - return $html ? '<ul>'.$html.'</ul>' : $html ;
! I: I4 [; G, l/ w - }
% S; O& X& X' F5 N- J* p2 o' ?5 R - echo procHtml($tree);
复制代码 输出的html的代码格式为:6 t* m# ]4 U3 \0 H$ _+ I0 ~3 k$ q+ |
- <ul>
# V' P/ V; ~' a) l. v+ m5 j - <li>往事如风</li>$ {( P5 ~: k+ E+ V/ z( u
- <li>水煮三国</li>
9 q G6 m4 S) S. }9 \8 Y - <li>技术学习
2 P7 \7 K9 D( l6 z1 \" \! S - <ul>: _' {( M$ n" C3 P+ }. B
- <li>html</li>3 ^5 T4 f; T s7 H+ `2 V5 ~
- <li>css</li>
% \/ \4 U' Y8 q6 Z: f - <li>php) k) [. J4 Y+ p0 Y x5 Q/ [
- <ul>& ]8 @# V8 |4 J2 m3 m( D
- <li>php基础知识</li>
$ T D0 O" w' V1 b' v - <li>oop</li>/ P% K# c: R! p9 Y Y
- <li>php安全</li>
复制代码 五.代码整合
7 j9 k' \% X: V5 U* x7 P+ Z- function getTree($data, $pId)
0 ^# S& a1 J$ X4 H# B& X - {
* }5 W& f, D& A- F6 C5 O* P - $html = '';: H; }$ Y. J! Y5 _+ `; V
- foreach($data as $k => $v)
8 X, l1 M, k1 L7 [5 }1 X - {) A$ H/ U& g. r
- if($v['cate_ParentId'] == $pId)
9 P# R, S* }4 a3 `! A# l - { //父亲找到儿子) n6 V4 ] z, ~% q! J& y
- $html .= "<li>".$v['cate_Name'];
I5 }, [% m/ N5 A' o# l& i! c - $html .= getTree($data, $v['cate_Id']);
+ y# Y# l0 [& S. X( }; @ - $html = $html."</li>";
- C" M2 I) S1 P; a# J" G6 ~ - }8 _1 d. p; f5 M, I7 _
- }
" W* w+ w* j* i( U$ x - return $html ? '<ul>'.$html.'</ul>' : $html ;
, G N2 p E0 p0 s- e: G5 K - }
. m! l1 G x1 k3 l. X - echo getTree($data, 0);
复制代码 六.增加CSS样式
( Z; ?$ l" W! s: I; o& D( `! T
$ S1 c9 p3 [2 F8 M, I3 F* d/ G- y. k" [8 g' @% g% l
第二种是从开源网站上看到的,非常非常的简介。
+ d8 ?; m! S Z% D0 [) p2 q- <?php: r5 z) t. B, `' D, G* e
- ! M7 P9 A5 `3 K4 [# a
- function genTree5($items) { & ]! u0 q+ P D4 a0 L
- foreach ($items as $item) + P H6 t! P! z [; Z; M
- $items[$item['pid']]['son'][$item['id']] = &$items[$item['id']]; % T) H/ H" N. K. {: E N
- return isset($items[0]['son']) ? $items[0]['son'] : array();
0 P$ [! i, z2 P s/ h& t; m - }
5 T4 H9 }6 k8 H z8 d( W7 U# u9 _ - 3 X) L# e+ E2 c& m! g- g
- /**% e( D, K, N4 Y1 }
- * 将数据格式化成树形结构. |0 x" B0 x/ u+ t8 ]# s/ L- U
- * @author Xuefen.Tong. E, I Q! E: o/ A/ @# Y
- * @param array $items
1 d" u" B; k% E5 z; l3 K/ Y" A - * @return array
+ B9 a9 p# i; q s+ R8 t - */6 Q$ Y B7 g# k( |+ j' i4 e
- function genTree9($items) {
# O( i' w0 j1 b/ Q( L - $tree = array(); //格式化好的树; K6 f% T* J/ K0 W; i
- foreach ($items as $item)
/ k [3 k9 E/ Q/ y+ {+ f* C U; C - if (isset($items[$item['pid']]))9 I- f) d% T2 X
- $items[$item['pid']]['son'][] = &$items[$item['id']];& x. N$ q; N+ p! X& P A+ r' g
- else- o v' A1 g1 ?( }$ D
- $tree[] = &$items[$item['id']];
2 W, l1 ]! w* X# s - return $tree;7 b9 M4 M: g$ I4 Z' F8 T7 z
- }$ n6 [7 p. s! h* v+ l6 V8 C
-
* r$ \6 U5 I' c. J- q - $items = array(2 C$ _6 U+ Z* \' Y L1 H2 Z
- 1 => array('id' => 1, 'pid' => 0, 'name' => '江西省'),
7 U9 z* C. u5 X9 O' d/ [* M - 2 => array('id' => 2, 'pid' => 0, 'name' => '黑龙江省'),
' Y. z/ `- z/ e0 D - 3 => array('id' => 3, 'pid' => 1, 'name' => '南昌市'),) i2 w1 o: L) Z8 T* f
- 4 => array('id' => 4, 'pid' => 2, 'name' => '哈尔滨市'),
2 ?% m( z! b5 d, `7 H/ x- c - 5 => array('id' => 5, 'pid' => 2, 'name' => '鸡西市')," R! y8 \' ~0 W
- 6 => array('id' => 6, 'pid' => 4, 'name' => '香坊区'),8 j# m$ C# ]2 g1 }$ O1 V! ^
- 7 => array('id' => 7, 'pid' => 4, 'name' => '南岗区'),
% L: U5 _. n+ f2 x% K+ N; U - 8 => array('id' => 8, 'pid' => 6, 'name' => '和兴路'),6 y5 J, K* z2 U. u
- 9 => array('id' => 9, 'pid' => 7, 'name' => '西大直街'),
# G) u. `# [: E9 j) k0 R - 10 => array('id' => 10, 'pid' => 8, 'name' => '东北林业大学'),
6 B. m/ k+ r- ^0 q, ~% L - 11 => array('id' => 11, 'pid' => 9, 'name' => '哈尔滨工业大学'),
, N( g2 A" r- z6 a5 g/ \+ i' o - 12 => array('id' => 12, 'pid' => 8, 'name' => '哈尔滨师范大学'),
& f( O8 q' z* y# T8 h - 13 => array('id' => 13, 'pid' => 1, 'name' => '赣州市'),
- k* h7 h2 C* S, k* p - 14 => array('id' => 14, 'pid' => 13, 'name' => '赣县'),
6 R/ z( E! M6 N! q, S3 v/ F - 15 => array('id' => 15, 'pid' => 13, 'name' => '于都县'),0 X9 e6 P$ [9 \6 u. ~
- 16 => array('id' => 16, 'pid' => 14, 'name' => '茅店镇'),
4 b( z9 \' g6 B - 17 => array('id' => 17, 'pid' => 14, 'name' => '大田乡'),! U$ I4 v; M0 t1 Z6 y2 g' D* |+ D6 B
- 18 => array('id' => 18, 'pid' => 16, 'name' => '义源村'),
- i/ m0 w& L) P% H: w - 19 => array('id' => 19, 'pid' => 16, 'name' => '上坝村'),
, B: y: q! ` V& D - );
: O; k/ K3 {5 B; p( P - echo "<pre>";2 p; R5 u6 Z0 {! X! @+ a( O
- print_r(genTree5($items));
0 R5 L( E* c8 M: t - print_r(genTree9($items));( ^5 w% @( S- B$ N9 k$ N& U
-
' r" x9 c& c. W7 g" e4 J$ [& B - //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; |$ T! O/ H3 M
- /*# s( R# P5 O8 b
- Array
6 q4 l3 }9 R u& C - (6 W0 C, D2 P# m/ O& `( M5 r
- [0] => Array8 T" w: g! V6 p$ A
- (8 K! c% N; B" ]. j5 p! ~3 e' p
- [id] => 1
8 d/ E" W& ^7 |2 e - [pid] => 01 P/ ~1 h D9 t( C% F
- [name] => 江西省
d6 g* u/ Y. V2 e8 E& T* [6 X- I - [son] => Array7 _ W7 f5 S$ R* @/ G8 L- M% I* a
- (4 H* ?/ R. D0 v0 G' ~: S+ |; n- ]0 F
- [0] => Array5 }7 Y( D: x& i% a, i; _
- (. w/ h; a6 M6 A* J' l
- [id] => 32 b# `( L2 ?9 I
- [pid] => 1+ v( e7 u3 y; L/ |
- [name] => 南昌市
4 U# j/ p& v. M) [# A- i5 S) a - )" W4 P3 d& x! k6 c t: Q7 K
- % i6 x8 @; }+ Q6 R. o0 X7 O( x
- [1] => Array
1 W* \5 b; \) C) b - (
1 p5 o, T8 @% t - [id] => 130 r6 x8 J2 l5 A/ j ~
- [pid] => 1, i, O( a3 j9 Y0 p1 F
- [name] => 赣州市
( J' t) P' |' J" P' R/ b - [son] => Array2 W I2 W% Z3 n {. l$ c
- (2 [9 g5 y3 x* |+ q/ y- F
- [0] => Array5 J% a) _% F2 L2 x f' N
- (
" G9 B# H) C. s6 I. L0 } - [id] => 14
1 k0 d9 @* V' Q, T) W- Y - [pid] => 132 ]5 ?, Y0 K' ?' q& p( I
- [name] => 赣县
0 ^' F7 Z" [0 B" \% S% u6 S - [son] => Array
2 h0 B6 J5 |- m$ K4 q# } - (
N" k4 G7 v. H2 {% x& b0 u- F2 W' N) \ - [0] => Array& K2 f/ T% A% U t5 c
- (
$ w5 p$ W, Y: J, l7 o0 y - [id] => 16" @1 t! P# @; @
- [pid] => 14
3 L ?1 q4 @% D3 M+ s9 \: F - [name] => 茅店镇- w r3 @; o! S) S4 m5 Z S
- [son] => Array
- P( a/ o# C4 ~0 w% L0 F, d! _( i - (
3 ?7 E0 B; I7 b; ^5 @) Y - [0] => Array
+ A0 w; c/ `9 ?% q: ^$ a - (2 L/ O1 C& D1 ^/ l E% h: M$ e
- [id] => 18
5 |+ d& ?5 Q6 X7 T% O! B - [pid] => 16
4 I; [, A, v2 Z7 x" \! V - [name] => 义源村$ |1 c7 j6 ^7 V( g
- )
. Q( j$ x& S) M3 C% {1 @# o% X - & L9 \! V; r) q2 y0 a) v4 s+ b
- [1] => Array
# `+ s0 Q5 i. C+ [4 B& L - (
8 w1 X. R' e, F2 J0 V: \ - [id] => 19
; k7 |7 R2 Y1 z5 o! f/ O - [pid] => 164 h8 T9 y$ t0 N- O
- [name] => 上坝村2 r! D3 l% l$ L
- )5 I6 _) ~, y! t
- : L4 Q8 R/ F' }- P& ^
- )# L0 ?5 N9 I0 x* U( @8 Q3 ]6 _
- - Z( s+ `$ K9 [, C. _" N! s
- )( f2 s2 n- W f; R: ]
- : c& V5 |! b- o3 o8 ^ F
- [1] => Array
1 g7 {+ D1 R! ]: _( p( X1 g - (
& G1 r% Z5 {! P - [id] => 17
. h7 l% K+ |! j- D" U - [pid] => 148 O) F! c3 ?+ `1 i9 |; j
- [name] => 大田乡9 q1 _' v; s; M# q
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-
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6 Y* ]9 \. g* _) T" i% N0 f, o - [1] => Array. G4 F; x- _. B9 I1 m
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- [id] => 15
8 r2 `/ p8 a3 z6 J7 d& f2 W - [pid] => 136 p( U7 m! y" I
- [name] => 于都县% x/ }3 {) I! z
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- [1] => Array
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- [id] => 2
, f ^6 R0 x& E$ N$ f - [pid] => 02 w/ E( F2 G9 C8 Y1 G. U: t
- [name] => 黑龙江省: @$ b1 y9 }+ R, y0 V6 ?
- [son] => Array
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- [0] => Array; v$ Q4 Z) c- R1 `7 ]
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* d! K& f% Q: F; x - [id] => 4
* r" A' O+ O" S r9 U9 ` - [pid] => 2+ J% b7 ~) u. p8 F! B* Q
- [name] => 哈尔滨市# M" B: n8 X5 w
- [son] => Array8 g; n6 R4 p% c) Q b
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- [0] => Array
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p: Z' L$ C9 S) X, |1 r2 e - [id] => 63 K* M+ _7 ?# ]7 B. G) D5 Z
- [pid] => 4
0 p$ c& k; `" O f" I - [name] => 香坊区" q+ d# @' d3 w* e- ?& G% d
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- [pid] => 6
8 |, K2 {$ d( }7 O - [name] => 和兴路
$ {% D; B8 ]4 e, F4 p - [son] => Array, R# z; k0 t0 A! Z! n
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- [id] => 10
3 S& i& o* ~4 d, r9 C - [pid] => 8
6 m2 E' H0 V) M; F' o8 w - [name] => $ W8 b0 A2 }; K6 x9 R* U6 b
- 东北林业大学2 X: P, l2 I/ v/ b. L. i s3 B
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- [id] => 12
# z6 N0 Q( `; L& K1 x - [pid] => 89 @6 G, Q+ ~1 T4 s+ c" ?& v
- [name] =>
1 |1 @1 @! v5 M - 哈尔滨师范大学" }% R5 R, z2 f" c' {) b
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8 i& ^) E8 A3 e, }. R - [id] => 77 k5 L" F, z2 q. v1 y/ q
- [pid] => 4
: L' c+ W6 _1 ?8 V4 e/ l - [name] => 南岗区
6 k# S& J4 i3 A2 | - [son] => Array4 E9 I# I" ?* u- A. I
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9 u) y& M) o9 C6 W - [id] => 9
o- S2 G! ~4 ?+ N; z. {" r4 k - [pid] => 7
- P$ C% U- n) n - [name] => 西大直街, R+ Z% B' H( z2 z/ P
- [son] => Array
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7 r; O0 P) \) U - [0] => Array
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- [id] => 11) v! ^" l1 T- h5 c* f
- [pid] => 9
$ e% [$ [& K, }1 q - [name] => ; m9 t" L6 d' K8 C6 D
- 哈尔滨工业大学# W/ ~& o# \* V: y' _3 p5 e
- )
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- [id] => 5
& H/ |6 C5 ~( Z1 H; r7 \6 h5 _ - [pid] => 2" c/ b( R3 U- \7 C9 d7 ~
- [name] => 鸡西市) N. V( t" g% ?8 r6 T6 ^% X8 i0 a
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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。; T" t( E/ I4 Y: Z6 S
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