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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。+ P5 [$ [' B! |; H- U }1 P
一.数据库设计8 Q0 r/ U- I; e' N' e, @
- CREATE TABLE `bg_cate` ($ ]5 N% }' p9 i7 w+ {3 R
- `cate_Id` int(30) unsigned NOT NULL AUTO_INCREMENT,7 N3 v2 u# v! c& G/ l
- `cate_ParentId` int(30) unsigned DEFAULT '0',
( [' C$ ]/ T# C: J - `cate_Name` varchar(100) NOT NULL,4 \2 m7 `: G0 R* i( Y# \
- `cate_Intro` varchar(500) DEFAULT NULL,/ o! p7 ]( u$ U" b: }; c. ]6 w8 w3 R
- `cate_Order` int(30) unsigned DEFAULT '0',
! g3 p/ L% f% e8 N. i6 F - `cate_Icon` varchar(100) DEFAULT NULL,
% h5 ~- \6 Q" O' V, V- X - PRIMARY KEY (`cate_Id`)
6 k5 C; L! |5 {" T - ) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=34 ;
! Z& U/ {" q8 |5 M - --8 q- [& K; _! u% m8 _/ b) E7 n
- -- 导出表中的数据 `bg_cate`
o3 D& d% g7 U - --
/ X- R" s8 U8 N1 h: X2 M! e) D - INSERT INTO `bg_cate` (`cate_Id`, `cate_ParentId`, `cate_Name`, `cate_Intro`, `cate_Order`, `cate_Icon`) VALUES% u, Y' f) p# c# ^; J
- (4, 0, '往事如风', '记录往事', 0, 'icons/6.gif'),
4 o2 t+ K9 ]) l' O - (5, 0, '水煮三国', '品位三国智慧', 0, 'icons/3.gif'),
6 F8 ]1 K- m2 E; Y" b. B - (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'),, F3 r2 \/ o3 o0 s: U
- (3, 0, '生活点滴', '记录生活点滴', 0, 'icons/2.gif'),
8 e& i5 {5 }/ l- {$ r9 H( c - (6, 0, '栀子花开', '青春无限', 0, 'icons/8.gif'),. P. J* n) ]4 b- _/ G; P
- (7, 0, '假日休闲', '悠闲、自在', 0, 'icons/24.gif'),/ d; n3 w6 ~* p9 l/ Q
- (8, 2, 'html', 'html学习', 0, 'icons/1.gif'),
7 P, H$ |( C$ l5 f( D+ T; [* S - (9, 2, 'css', 'css学习', 0, 'icons/1.gif'),& O% ]4 | o) y( T1 V
- (10, 2, 'php', 'php学习', 0, 'icons/18.gif'),. }) V0 Y' v7 X4 l" k( ? z$ \
- (11, 10, 'php基础知识', 'php基础知识', 0, 'icons/1.gif'),
% S5 w; ]& P9 I - (12, 10, 'oop', 'oop', 0, 'icons/1.gif'),- J( `+ j6 t+ u8 J4 C: F8 Z
- (13, 10, 'php安全', '讲述php安全', 0, 'icons/1.gif'),
" v. z3 B' q I& }( @ O - (14, 10, 'seagull framework', 'seagull framework', 0, 'icons/1.gif'),) j. n4 I* I' _# R4 ~ M+ F. ^
- (15, 2, 'javascript', 'javascript学习', 0, 'icons/1.gif'),
) _2 x0 B/ X# \, @ - (16, 2, '设计模式', NULL, 0, 'icons/1.gif'),& i6 n& K+ F. `! L1 |2 Y5 Z
- (17, 2, '软件工程', '软件工程学习', 0, 'icons/1.gif'),
; q' O0 N/ ~7 x5 t+ v3 F8 w( R - (18, 3, '厦门生活', '厦门生活', 0, 'icons/8.gif'),( _8 A2 N/ y% _7 h3 Y) S! o
- (19, 3, '大学生活', '大学生活', 0, 'icons/8.gif'),% e/ n) ]! a4 G. g+ R% W9 [, l
- (20, 3, '童年生活', '童年生活', 0, 'icons/15.gif'),2 w1 V* e# c/ y- L! ?" F* m* h
- (21, 19, '学习', '学习', 0, 'icons/1.gif'),
' |! c* e5 k- s1 D! L9 s - (22, 19, '运动', '运动', 0, 'icons/16.gif'),& \5 v: B _/ m. }
- (23, 19, '旅游', '旅游', 0, 'icons/24.gif'),
' {% V6 w9 E2 x3 _* a+ @* W - (24, 22, '排球', '排球', 0, 'icons/9.gif'), j6 V/ ^/ U9 l4 ^2 }+ e
- (25, 22, '篮球', '篮球', 0, 'icons/9.gif'),: Q h' h0 f: ^2 A# h' C9 \
- (26, 22, '羽毛球', '羽毛球', 0, 'icons/9.gif'),8 \. z O! t# U8 P. c; z" N
- (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。
- F' k' g5 u1 Z2 D `- require_once './classes/MyDB.php';
+ m; w Q6 U, d% k9 ~( E - $con = MyDB::singleton();4 y" O2 O( U2 H$ o% H1 [
- $sql = <<<SQL
5 @2 C- L" i5 @4 n$ c - select * from bg_cate cate
3 l; a& b1 T/ V7 a3 { - SQL;
* z* W ?/ Y% F9 w$ K5 u' \ - $data = $con->getAll($sql);; G1 |9 S& r6 N0 V! j
- //print_r($data);
复制代码 数据库操作我用的是pear类库。+ m" w' w3 l# R6 }1 V) A
最后的$data的数据格式如下:9 @# M/ p9 |$ Q5 p% V
- Array6 ~' z2 T/ ]5 s0 ?1 c
- ($ h% L8 L( G# \$ ?+ m+ D
- [0] => Array
; q' E( `7 r5 t4 a+ @8 @% g - (* v8 S2 N- u2 P {# }0 ]4 P
- [cate_Id] => 4
7 j, Q9 G" Z; d2 H8 N3 v. t - [cate_ParentId] => 0
3 t# b$ J1 L8 s& p' a" a' i - [cate_Name] => 往事如风
4 V# _9 u" O1 l* d( v - [cate_Intro] => 记录往事
' _. y0 s3 b- \; j: W# _ - [cate_Order] => 0
6 I7 O% P5 L1 e) B8 Y - [cate_Icon] => icons/6.gif
* T1 b9 r+ B* _0 B' H) v - )
7 K A+ I1 H7 A* ~* G2 q5 z( m, Y8 s- k - [1] => Array
6 v# H6 U1 H, I B - (- F- v' \# ~# l, {1 N5 `
- [cate_Id] => 5, ]8 S% ^# o. R- C9 C( g
- [cate_ParentId] => 0/ Z3 C. ]% E6 k/ H% k+ S) R
- [cate_Name] => 水煮三国. U9 H. V4 o! Q) C8 b$ U
- [cate_Intro] => 品位三国智慧) Y# ~' H& r) Y. z" l
- [cate_Order] => 0: t$ C' x5 Y' ^$ x7 o R/ I* w2 j6 ~
- [cate_Icon] => icons/3.gif# c* z- W3 ~ h! n8 T
- )
复制代码 三.把上一步的数据转为树型状的数组
; D! x1 y$ n; H$ t. t) ]# W代码如下:/ q8 j' R" x5 g; U
- function getTree($data, $pId)
3 }4 N' S \4 D - {
' S+ W( B0 h1 P# T! H5 S - $tree = '';# _! U. V5 d$ C2 `
- foreach($data as $k => $v)" W+ u# [2 f; h* h5 o
- {0 j. j/ Y( J O
- if($v['cate_ParentId'] == $pId)( g! ^6 K! E) a0 E% w' f8 ?3 ^( U0 Y
- { //父亲找到儿子& A- U0 s$ s/ m' U9 ?( P
- $v['cate_ParentId'] = getTree($data, $v['cate_Id']);. [3 Y2 Y0 Q* z( J+ L7 I0 f
- $tree[] = $v;
) z A% @. A. |- b - //unset($data[$k]);4 h" u( ~% d B M
- }
6 \# B7 L! v5 {* M9 Y8 q' u# @. U' t - }
7 y+ R% ?2 e" | q - return $tree;
$ J) B" g7 v. S - }
$ R3 t) a0 g. u1 h( p) ~: ` - $tree = getTree($data, 0);
复制代码 最后输出$tree的数据格式为:
$ U0 d* W t9 V9 I- Array% D0 \/ q& m) S Q5 q; w0 Q
- (
# E$ [% C0 t9 g7 P# a% q - [0] => Array
9 Y( Y; t( ^2 B G8 i" A- M8 [' s- J3 x4 i - (
5 g+ l/ b" m, Z r8 b - [cate_Id] => 4' t% v# ?6 t1 U+ w' F7 ?; h
- [cate_ParentId] =>+ {! l% ^( K }6 }4 h
- [cate_Name] => 往事如风# ]5 Z- o# W/ M% W- h
- [cate_Intro] => 记录往事
! A1 d) a- @3 I2 a" m& P/ O - [cate_Order] => 0
" c; v- C' x$ ~" @& { - [cate_Icon] => icons/6.gif
" N m8 D& t/ X3 N - ): X; e; w# e4 u+ T7 Q. w, p. F2 c
- [1] => Array
- @7 T5 T/ D* f: p& V$ M8 z9 V( x - (
- _5 q$ i* B. M+ K, i( b - [cate_Id] => 5, H$ f# ^$ n! o ~
- [cate_ParentId] =>/ x, W ~4 q. o, k9 z- C; m. W
- [cate_Name] => 水煮三国" a0 t0 v+ o* V3 M( o
- [cate_Intro] => 品位三国智慧
; n1 M0 e5 _9 K; v+ \ - [cate_Order] => 0 _, g. o3 a- i' N
- [cate_Icon] => icons/3.gif2 M1 ^! Q/ p9 V* u
- )
/ ^" n/ S" N( M) n& w$ F - [2] => Array
; p. m6 L% u8 z* a( T - (
2 [9 A. ?; O# }7 Y. D2 E9 ?0 F - [cate_Id] => 26 d0 |. u) V- K! Z B, Y, q
- [cate_ParentId] => Array
6 k) A h" s5 x4 v ]. { - (' \6 H/ w( [- z; ^) T+ ]- `) U
- [0] => Array
! X' P; C% @& W) d - (
& \) z3 F4 X4 F - [cate_Id] => 8
R; D3 S9 v B0 c" K. {2 { - [cate_ParentId] =>; b7 ?1 T# S+ v: T. T' W( N
- [cate_Name] => html
, s. `0 K9 V n1 R+ w - [cate_Intro] => html学习; {- I( K9 V- I4 w& u
- [cate_Order] => 0
& r& P5 R/ j; l% n9 I. S - [cate_Icon] => icons/1.gif
* l# t& ?/ m, ~" A+ U) |8 b - )
复制代码 四.把树型状数组转为html
3 o( z9 X% Y" `* t- E代码如下:5 P6 h) W! W# D/ v7 Z0 l
- function procHtml($tree)
$ m+ U' s4 @7 d- `3 n! _% s0 ] - {' ]& t/ w% m# f+ |0 d
- $html = '';/ J4 L9 v3 h4 U& ~5 L' I9 K* w, M, I
- foreach($tree as $t)
o0 g" c+ q8 I/ [* d* p l6 u. v - {; m1 M* }8 @8 q, _, j* X
- if($t['cate_ParentId'] == ''); I! C7 S3 Y! j) u, b4 F
- {; r% f5 E9 Y5 w5 t+ A& S( q5 w8 m
- $html .= "<li>{$t['cate_Name']}</li>";4 M+ H x' U& ^$ B
- }! k7 _$ _9 |: a8 b2 P
- else
( F* J9 f0 W | - {
x3 ^- d$ G$ f - $html .= "<li>".$t['cate_Name'];
' m( m8 Q% p2 ~0 }' } - $html .= procHtml($t['cate_ParentId']);
* B9 ]8 o& v- L5 @; O - $html = $html."</li>";
, K* L; y* G; h4 D- w2 [, g0 O! A: ` - }, O* C$ W0 x$ m9 s
- }- F& R3 O0 o d0 j9 T/ P
- return $html ? '<ul>'.$html.'</ul>' : $html ;8 Y( c( Y( H! F8 X! W2 H
- }" W5 j J$ N, t$ _8 a" F8 s0 t2 O
- echo procHtml($tree);
复制代码 输出的html的代码格式为:
/ J# W% T6 r8 Q1 x! o- <ul>
+ ~0 m( ^* m* V# E/ Q - <li>往事如风</li>% ?( t9 c, r$ x3 v
- <li>水煮三国</li>. A* o! N, O8 ~ E
- <li>技术学习2 u) E7 M6 h \2 p4 E8 N d
- <ul>3 |/ k, A, q7 D- x
- <li>html</li>
+ }( R& L+ n: L8 M - <li>css</li>+ ?% e8 B' U1 S! o x' _) b* o8 f
- <li>php
: U- M3 L2 @! b* J7 y! t. W) b - <ul>" t8 m9 x$ a* A6 _% u! x
- <li>php基础知识</li>3 E" g3 ^/ G0 J
- <li>oop</li>
, B: o9 \( J( Y" G: r- k0 ?7 c - <li>php安全</li>
复制代码 五.代码整合
7 t* W/ o3 M/ Q; Q8 y8 ~! T" o- function getTree($data, $pId)
; M/ T: |) I/ a; R F) V- H* @ - {
) w% ^' g( R& ~0 ?9 e) d3 ~! o - $html = '';
1 h; [) v" b8 X1 p8 S - foreach($data as $k => $v)
& a7 @% E' Y8 S, j6 H - {
: [' S v9 i" O; J. L6 h - if($v['cate_ParentId'] == $pId)
, S4 S8 ^$ [7 q! `9 { - { //父亲找到儿子
3 C4 Y! o1 ^) k7 { - $html .= "<li>".$v['cate_Name'];
% w9 H @3 |3 |8 P - $html .= getTree($data, $v['cate_Id']);
5 M. I8 B& l" m5 W4 k - $html = $html."</li>";( n1 S, J7 c' k" ]( P" v
- }( s. N) K& y0 z- x1 z
- }
. o$ K) c6 q+ h, | - return $html ? '<ul>'.$html.'</ul>' : $html ;
" E9 s# U. T8 N5 }# j9 v - }# _4 P3 y: e: ]' O' ?
- echo getTree($data, 0);
复制代码 六.增加CSS样式
5 `7 g8 E, l3 g5 A
4 E$ W; Z0 X" }8 ^# g7 Y
7 L2 ]0 |) w& h" P# s7 x7 Z* x. r
第二种是从开源网站上看到的,非常非常的简介。+ J# b( N3 x$ t" }9 U* j3 h: k
- <?php" N- F6 G3 ^ T, L
-
( A4 A# r& Y3 _8 f - function genTree5($items) {
( q' ], `) @# J5 s2 ? - foreach ($items as $item)
1 f$ b* F h8 _ - $items[$item['pid']]['son'][$item['id']] = &$items[$item['id']]; 8 y3 |) [& m2 S+ \" N
- return isset($items[0]['son']) ? $items[0]['son'] : array(); + {% `( F3 b) W6 p8 ^
- }
$ G9 u, M+ C: C - D- e7 g) ?/ C4 }
- /**
4 j; T" z0 h# p( u: `3 R - * 将数据格式化成树形结构
9 [5 g0 t( f* m' D/ V) j - * @author Xuefen.Tong# z# G/ c/ C* E9 m
- * @param array $items. f( Z& A' h$ l& v7 g
- * @return array
( ~- Q" x# _3 m- X3 v: x - */) e9 J( I2 Q9 }/ G2 P. e+ r1 F
- function genTree9($items) {8 B$ D- [) Q/ J' ~# T3 s7 J9 d' K* z
- $tree = array(); //格式化好的树
. V: P; k: d D - foreach ($items as $item)
6 j# e+ O$ b$ A3 F - if (isset($items[$item['pid']]))/ e" r. d) |8 c
- $items[$item['pid']]['son'][] = &$items[$item['id']];; z- q8 j1 G* l' G) b- q( @( l
- else
: w8 d8 j& `! h' |% n; t9 p - $tree[] = &$items[$item['id']];
* I, y9 X: d5 q. X, N - return $tree;) `- D) A8 X( d6 v1 Y
- }
0 A9 {4 c3 O( e( ]; E- ^( P - & a$ u1 Y- J8 c
- $items = array(2 E; I9 f5 q; T1 x; }
- 1 => array('id' => 1, 'pid' => 0, 'name' => '江西省'),
6 f. N3 t( Y: P2 `5 z6 Y# @+ z - 2 => array('id' => 2, 'pid' => 0, 'name' => '黑龙江省'),! b& I* w; A# f" p
- 3 => array('id' => 3, 'pid' => 1, 'name' => '南昌市'),
" F! X" |0 f% b8 i/ Q9 f - 4 => array('id' => 4, 'pid' => 2, 'name' => '哈尔滨市'),; p2 p( @! S' w; u1 U; q A T
- 5 => array('id' => 5, 'pid' => 2, 'name' => '鸡西市'),- W& E! g3 W1 j4 ^$ r: Z& p
- 6 => array('id' => 6, 'pid' => 4, 'name' => '香坊区'),
+ ]! z( d' T4 b& F+ X8 o9 M/ J- k7 w - 7 => array('id' => 7, 'pid' => 4, 'name' => '南岗区'),
( A4 l/ ~6 k$ A* P - 8 => array('id' => 8, 'pid' => 6, 'name' => '和兴路'),* b' x+ H/ w( ]8 @' w s
- 9 => array('id' => 9, 'pid' => 7, 'name' => '西大直街'),6 B& \ D2 X! b
- 10 => array('id' => 10, 'pid' => 8, 'name' => '东北林业大学'),
5 d3 h4 O1 Q& s1 a - 11 => array('id' => 11, 'pid' => 9, 'name' => '哈尔滨工业大学'),( H1 o2 B/ l" v% J" y" B& ~# I6 C: @+ u
- 12 => array('id' => 12, 'pid' => 8, 'name' => '哈尔滨师范大学'),
7 O. e+ {7 L% F - 13 => array('id' => 13, 'pid' => 1, 'name' => '赣州市'),2 a, N! a1 D+ m% D8 r8 Y
- 14 => array('id' => 14, 'pid' => 13, 'name' => '赣县'),
+ Y+ X8 W c" R2 {* R$ a. ? - 15 => array('id' => 15, 'pid' => 13, 'name' => '于都县'),
+ k V* R% B. D. N- V* [ - 16 => array('id' => 16, 'pid' => 14, 'name' => '茅店镇'),
4 b) m( L, g- j9 s+ h. R# X( r - 17 => array('id' => 17, 'pid' => 14, 'name' => '大田乡'),
! k! t- n* S) I) E5 ]$ I, [ - 18 => array('id' => 18, 'pid' => 16, 'name' => '义源村'),( m$ ^$ Y9 m& e/ k/ ]( I' ~- g
- 19 => array('id' => 19, 'pid' => 16, 'name' => '上坝村'),6 I5 }* ]$ S1 N' L/ g# Q; \" ~% y
- );
! g8 ^* m2 l# p% u6 w; u8 ^$ @ - echo "<pre>";
7 G1 {7 N& f" p: A& ~ - print_r(genTree5($items));
# |% s. [8 N& T, v' D" | - print_r(genTree9($items));0 {% o9 p* h- r! m
-
" W5 \1 T$ t y8 u) ` - //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6 f2 J2 d! w3 \; Q2 ~
- /*
0 R2 N" t% }( x' V6 t: R, p - Array) [) f5 N9 z _' C
- (( {) L# j6 w0 h8 }- {
- [0] => Array' R- {) B4 m7 y9 b$ A2 p; Z# p! p: f
- (
6 X8 ~ }5 ?. @& t% ]& { - [id] => 1$ w$ E% |/ X/ t) m% l
- [pid] => 0! W/ V' f# R0 u& Z
- [name] => 江西省6 A! K0 F1 f8 W: ?) a. d7 `: t x) @
- [son] => Array/ j" y- a0 |1 x' `
- (
* b- e2 ^2 v: ~: V - [0] => Array
7 h0 L2 B; z/ i. O7 t - (5 L* ]& Z4 Z' @% t/ R- z4 R
- [id] => 3- x: P5 M- z. ~
- [pid] => 1
3 L5 k! [0 ^0 Z. T c. j! ~5 Q! U - [name] => 南昌市: O# z* T% f; Y* t8 u' A, t3 H4 K
- )( m }- } J9 `0 H, r j$ q
-
+ _7 H3 \4 {' {1 P2 E$ X/ Z$ V, F: C - [1] => Array
0 k; K# n- u: I - (# K7 V6 G- b0 F2 }! M2 S& S
- [id] => 13
: ^# r" \# r3 i" h: l. u - [pid] => 1
: f/ Q. s0 [7 F8 m8 H - [name] => 赣州市# v: e: G1 N' k% X: G" L
- [son] => Array
/ s6 d* r- U8 z4 }+ ~3 M) X& G - (7 {% i( P1 ~. }: G
- [0] => Array) B) d8 \& u/ l7 k
- (
, c: u9 }) ]5 F" h/ W/ P3 S - [id] => 14
" e8 ]+ r& @9 Z/ B* | - [pid] => 13" u1 s8 j, q$ N
- [name] => 赣县
9 k ^* N& C* m/ |! P- n Z" s - [son] => Array5 ]. F4 B8 M0 e( Z
- (
2 e* j. f' t8 J7 V. u+ ] - [0] => Array# v& v" f. V" t
- (
, p7 C% ~6 s, |9 K" g - [id] => 16) N/ T' L1 v" K( X1 F
- [pid] => 14
! e7 B2 e$ ~. i - [name] => 茅店镇
# n/ k0 v* v0 @7 z# { - [son] => Array
- {# S3 |% g7 f3 { - (
; }4 ^/ _; t1 @- U* ?5 Z0 Q - [0] => Array) |" [- r8 i; J7 ]7 X! K6 Z
- (
2 [. X4 M0 q. |; a# i - [id] => 18
. o; I* a( m$ Z5 r8 k1 H* x! Q - [pid] => 165 ?. x: L: M3 n$ y% v/ q/ ]
- [name] => 义源村
% d3 m, `6 t' F& e - )! F+ F# q! T+ k# m: z$ i
-
/ z( ~) z: h8 O; D2 I F5 ^7 } - [1] => Array5 t8 a6 b& S( S% t- [
- (" u' t) G/ e- b
- [id] => 19
" u+ c1 b% @9 \- s - [pid] => 16
' X7 p; Q6 O# |! G - [name] => 上坝村: A" \6 C. X& J1 K
- )
% }6 M+ i4 _# w& m# x# [ - 7 l+ c6 K a) X2 \( _- ]
- )0 T2 o* e& n( x/ z2 ~! t. N9 {
-
8 B* t" k4 `5 k: x C5 c - )0 v& p4 y+ @! g, [) e2 d9 \
-
) R: l2 \: X( E2 o - [1] => Array5 Y4 c# Y! T7 ~( s5 P2 v
- (3 X- A% ]) \7 H+ U6 j. d6 }
- [id] => 17. A( h$ M1 r \2 O
- [pid] => 14
! v+ l7 ]3 F+ V) f f) D - [name] => 大田乡/ F6 K: Z5 A% s$ J9 v: `
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- [id] => 15; f4 O7 m# U0 E, o1 K
- [pid] => 13& L+ Y9 t7 Z3 c
- [name] => 于都县
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- [1] => Array
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- [id] => 2
p5 K T1 v- G9 q( Z3 l$ m: K - [pid] => 0. X- c: G; i6 M# u
- [name] => 黑龙江省
% W+ B" i8 T, D1 C+ _# | - [son] => Array
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1 {3 h$ C- c! J( y1 B4 g1 R - [0] => Array! p0 x7 B# k8 E) R! }! b
- (0 z& t: H' q% J1 I7 [: F
- [id] => 4# e5 i8 [( V* J& ^2 T3 d9 v1 N; K
- [pid] => 2
0 H, G4 J" [9 h# `- j$ N - [name] => 哈尔滨市
, B- ~. d& f+ k, j5 f% o5 @% L - [son] => Array
3 R5 R2 c M$ v2 V2 y. r - (. L: U1 ^1 Q* i) W, S
- [0] => Array: l/ ^0 P" B- q6 k
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2 a* N$ r% q, h, R0 G5 j - [id] => 6
9 D# {2 q* c( \' v$ c9 c) X - [pid] => 4! L' P, U' A! g0 [; V4 X! y
- [name] => 香坊区
T( ^& u. c" f( U8 n, B - [son] => Array7 h7 h* k, j8 p
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- [0] => Array1 X9 ?: v& T" a* h Y
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; N2 k# P Q* i6 a8 X4 H5 P - [id] => 8
& v+ V6 S9 l1 l( B0 M - [pid] => 6# s& v4 l2 K7 d+ q) B6 G
- [name] => 和兴路
- {: P @7 E, r) `8 C- Z' [7 t) l8 M+ b - [son] => Array: `1 d) o. i4 }% n
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- [0] => Array: P; [& a; y2 i9 ?
- (7 l. I7 r' ^7 W
- [id] => 10
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- [name] =>
* ?: ^( B3 O& i6 E( W, u - 东北林业大学' k; T4 x7 E8 O
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- [1] => Array) t2 q! L0 P, ^
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2 ~( H% p' q- ? - [pid] => 8
9 `$ x9 V2 _% f, l; [ - [name] =>
' x, P2 n" c* A6 ~0 ]3 F# C7 O - 哈尔滨师范大学" l; }- }7 S+ @( b
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- [id] => 7
- @( W. x( F. ~) ]: ] - [pid] => 4 Y6 A) }. ^5 F) k; K
- [name] => 南岗区6 I$ R* d7 y. g( O7 `: ?! i
- [son] => Array
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- [0] => Array9 B3 |# O. a5 Q% \$ y* q
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- [id] => 9
% |) R* n8 h8 G. ^4 s - [pid] => 7
& R2 ^% J1 {% A1 _4 ~: h% x4 F# f7 t - [name] => 西大直街0 ?, V% U; ?. x4 h% t
- [son] => Array
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- [0] => Array
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- [id] => 11
1 E+ d% I! G3 z: m) Y - [pid] => 9
4 V; e$ D# ~( c+ b O: G T - [name] =>
% x. T2 @( T! v1 o. F3 j - 哈尔滨工业大学! ~8 `( S/ u$ Z0 F
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- [id] => 5: d- | f3 p: K: O( r
- [pid] => 2
9 |! L; C% E' h! v% I) L - [name] => 鸡西市
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-
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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。' U5 N! j8 ~ ~" `; v" \/ M) f" X9 t
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