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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。
" a* Q+ b: E1 l# g, n一.数据库设计
, c# r, c! h5 ~. [- CREATE TABLE `bg_cate` (
* }- k5 t. j/ ~$ e& _& I - `cate_Id` int(30) unsigned NOT NULL AUTO_INCREMENT,
* X$ A5 b) i" a - `cate_ParentId` int(30) unsigned DEFAULT '0',
, j: E# P& h1 y$ ~ G" y5 H2 P - `cate_Name` varchar(100) NOT NULL,) \* s Y$ q0 Q# X6 H+ s' ^- U3 }
- `cate_Intro` varchar(500) DEFAULT NULL,
) f8 E0 w* i. a3 L1 \ - `cate_Order` int(30) unsigned DEFAULT '0',
4 N2 I8 j" F# y: t4 v - `cate_Icon` varchar(100) DEFAULT NULL,* B8 |! J Q. h V5 ~. L
- PRIMARY KEY (`cate_Id`); B* l- b' R2 y! y& ~
- ) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=34 ; B& o' V' S. ]) X
- --1 K+ L9 f; `2 n. d1 Q G
- -- 导出表中的数据 `bg_cate`
* T# P u) Z+ o+ H - --% }3 d2 H0 G& w1 r# i' N
- INSERT INTO `bg_cate` (`cate_Id`, `cate_ParentId`, `cate_Name`, `cate_Intro`, `cate_Order`, `cate_Icon`) VALUES
; l9 k' |' Q/ U - (4, 0, '往事如风', '记录往事', 0, 'icons/6.gif'),
, ~# L: ~. Y( E* r6 A - (5, 0, '水煮三国', '品位三国智慧', 0, 'icons/3.gif'),2 x2 H$ {) V9 G4 ~( h0 C; `
- (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'),5 L8 A) A+ A/ E; q
- (3, 0, '生活点滴', '记录生活点滴', 0, 'icons/2.gif'),! f# O. C! H5 l* ^# w7 p
- (6, 0, '栀子花开', '青春无限', 0, 'icons/8.gif'),
& \5 n% e* P D3 ^+ x- Q, t - (7, 0, '假日休闲', '悠闲、自在', 0, 'icons/24.gif'),1 u' d" j# H3 D
- (8, 2, 'html', 'html学习', 0, 'icons/1.gif'),
4 @6 O1 \9 Z% W% g) X# ~ - (9, 2, 'css', 'css学习', 0, 'icons/1.gif'),+ s8 Z5 \# ~- e4 N0 F' w& z$ X/ y
- (10, 2, 'php', 'php学习', 0, 'icons/18.gif'),, R; Y8 j8 k5 R5 O3 J
- (11, 10, 'php基础知识', 'php基础知识', 0, 'icons/1.gif'),; z& D4 J1 T- t. k# g
- (12, 10, 'oop', 'oop', 0, 'icons/1.gif'),
% m7 ~: g' P: I6 U - (13, 10, 'php安全', '讲述php安全', 0, 'icons/1.gif'),8 s5 y1 i- B3 @' Z% z h; K' T- e) b
- (14, 10, 'seagull framework', 'seagull framework', 0, 'icons/1.gif'),+ e& Y1 s2 [9 L: f, q2 Z
- (15, 2, 'javascript', 'javascript学习', 0, 'icons/1.gif'),
$ |* g, y% ^# J) X& N1 t. O - (16, 2, '设计模式', NULL, 0, 'icons/1.gif'),# U1 \4 ^. O7 k* Z0 ?" p1 D2 X
- (17, 2, '软件工程', '软件工程学习', 0, 'icons/1.gif'),! d. F" i' g2 o1 \& t, @7 v7 p
- (18, 3, '厦门生活', '厦门生活', 0, 'icons/8.gif'),
0 r7 d) I' r6 }% n+ g a/ }" N - (19, 3, '大学生活', '大学生活', 0, 'icons/8.gif'),7 r% a% q# @- f$ J
- (20, 3, '童年生活', '童年生活', 0, 'icons/15.gif'),
: w! F% {2 X8 z3 A! I: n: _, y4 i - (21, 19, '学习', '学习', 0, 'icons/1.gif'),
" m5 `/ j" c# h; g$ B) T - (22, 19, '运动', '运动', 0, 'icons/16.gif'),
8 Y0 O+ I4 v5 f1 `! l - (23, 19, '旅游', '旅游', 0, 'icons/24.gif'),2 ^9 c! P4 m% k
- (24, 22, '排球', '排球', 0, 'icons/9.gif'),5 {' w4 m( U9 D2 n4 S+ j" ?
- (25, 22, '篮球', '篮球', 0, 'icons/9.gif'),
" q( L S: M6 C9 k$ q: \- l - (26, 22, '羽毛球', '羽毛球', 0, 'icons/9.gif'),, H! [ r5 k* Z/ L) e- f0 p. A$ i' T
- (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。; x0 u$ ]9 @% }* o0 P
- require_once './classes/MyDB.php';( B8 ]& H8 @5 [! O1 I* T$ \
- $con = MyDB::singleton();9 {8 s. d. C9 D+ u& {( T
- $sql = <<<SQL3 y, @* |8 h8 B N; p9 s
- select * from bg_cate cate
7 K- S; N6 ^" Y. _& q - SQL;! _; ~* w% b+ o7 ?
- $data = $con->getAll($sql);4 g L r n4 c2 A
- //print_r($data);
复制代码 数据库操作我用的是pear类库。* D" D3 x Z! P4 e$ V1 K/ ~) r1 \# C
最后的$data的数据格式如下:
& n7 D+ }8 U+ k/ N! i( E( s- Array+ i) j8 P) i* p
- (9 h# J( r; c% O6 C1 K) p
- [0] => Array
" ~2 @2 [1 D N# r - (
0 q9 U' |# A9 t: K% s$ p - [cate_Id] => 4# h( Q, D4 j, m1 w4 Q5 ^
- [cate_ParentId] => 03 N; w/ R Z {! D, F6 R
- [cate_Name] => 往事如风' i: a* ~; s! \) ]. P
- [cate_Intro] => 记录往事 U3 s" ]8 I# X" _5 g2 d4 D
- [cate_Order] => 0
2 O0 x; Z$ k& @ P - [cate_Icon] => icons/6.gif
6 ?4 G; e2 S: j- R8 b5 ^ - )
# F+ }1 @* L( M. W - [1] => Array
6 t4 \/ O" ?# D( k# p' g - (1 s$ D9 H* x/ b2 Z3 F( x
- [cate_Id] => 5
: W- T' U( Z: [' r- }( X& z - [cate_ParentId] => 0
& o' N0 b) I' T1 o/ Y: |, f - [cate_Name] => 水煮三国. s1 M! h, t9 A; J2 n9 ^
- [cate_Intro] => 品位三国智慧' L& V) R4 t7 o: k' M
- [cate_Order] => 0
2 y+ m6 ~- i2 H% E! J - [cate_Icon] => icons/3.gif
% }. o5 Y4 n* ^8 F - )
复制代码 三.把上一步的数据转为树型状的数组
7 U7 s6 v4 q) {& B2 i. O9 t7 d0 Z8 g代码如下:
/ v: D+ S% }: m0 Z- function getTree($data, $pId)
" l$ O/ H1 @0 m, N - {$ L) E+ k. V. G+ E
- $tree = '';5 b' m, j8 s0 n$ S/ c* T6 `
- foreach($data as $k => $v)
* b R% ?) G/ H" t/ ` - {
* G/ C6 c6 D( C/ q' j' M - if($v['cate_ParentId'] == $pId)% K$ U( ?, W5 e7 A8 q# S$ a
- { //父亲找到儿子3 {2 E/ K& u$ P, h6 O/ a, {
- $v['cate_ParentId'] = getTree($data, $v['cate_Id']);! \$ P; T, ~. z q: {5 p
- $tree[] = $v;
' q7 H# L. Z8 \6 g9 Z0 Z - //unset($data[$k]);
% i. J' F* S( h - }
3 J( ]) H V2 j- F: F* e - }
; D. O$ P9 Y! ^8 z* ` - return $tree;
; T' H6 P: h6 t6 Z- ?$ [; o9 @; _ - }
/ L! m$ x4 W$ a; E8 \; r& D - $tree = getTree($data, 0);
复制代码 最后输出$tree的数据格式为:
7 z* L6 C. @0 u; r7 K/ d7 f- Array2 p4 G1 D4 h8 b2 O) F
- (! k( u V! i0 k7 e% k8 v! S
- [0] => Array
9 p5 q: d. k* l$ B6 E - (
0 J1 q$ P. n9 ?5 U3 S* ~ - [cate_Id] => 4
* N+ y F2 |+ Y2 \6 V - [cate_ParentId] =>
4 ?# s! C7 Y+ ^7 f - [cate_Name] => 往事如风3 K7 ]5 Q; ^) A! x
- [cate_Intro] => 记录往事/ ^) q$ J- Q4 e) q
- [cate_Order] => 0# {3 b, A. r5 A5 Q/ G# v
- [cate_Icon] => icons/6.gif
: G3 p0 q! S$ D; h- F - )
: L2 S" \. L1 U# u$ w" S - [1] => Array
' }' ?! x) W( m# a2 Z9 h - (- C% i1 }7 [3 P! D* p
- [cate_Id] => 59 x# C8 M2 x3 w9 n
- [cate_ParentId] =>
1 X7 y; Q& n& B# v" D: W- t - [cate_Name] => 水煮三国
1 T4 @' t+ d: M4 Q! | - [cate_Intro] => 品位三国智慧+ m. l: h" m! e7 e4 H& A
- [cate_Order] => 0 }4 k Z* C' R9 s( }- o4 w
- [cate_Icon] => icons/3.gif
$ M' H; x0 M" j6 {9 b, ^2 u - )
: m7 D1 x4 Z& R - [2] => Array, U; V: c0 }( w4 I8 G* F+ s" G
- (
- ~+ r& n0 u$ i2 O, V4 ^ - [cate_Id] => 2
- G2 N& u( h5 {( ]' \, ~ - [cate_ParentId] => Array
- @5 m9 k7 a2 f7 k8 @: \ - () P I. ]( u0 N: Q: g
- [0] => Array E+ A7 l/ g: K; @9 m
- (' K2 S5 l, ?9 G
- [cate_Id] => 8
& y- Q l; O3 P6 D- S( l$ n- O4 O - [cate_ParentId] =>6 N) C! g/ k2 B: x! n
- [cate_Name] => html8 @# l* U; _, A7 s- S
- [cate_Intro] => html学习
5 W) ~+ k/ g3 B& x( M - [cate_Order] => 0! g1 D6 Y/ v8 q0 u
- [cate_Icon] => icons/1.gif
8 l" a: u6 q. x9 z - )
复制代码 四.把树型状数组转为html
5 w6 D2 D+ E6 c) T$ M代码如下:
# H$ C: W! i5 \/ T/ j- function procHtml($tree)
+ k! _, v: A, d+ I1 V P7 t7 g - {
; t: Y9 s" Y$ r - $html = '';
5 W. W0 E3 k! n% M' h - foreach($tree as $t)
6 W- D( {4 f* G$ v; o# w& X/ c - {/ S0 U% N B7 t7 z- c" O2 e' ~
- if($t['cate_ParentId'] == ''): D M4 l& A6 \- C0 J1 D
- {( N, q) F1 r+ @- r5 M% H6 M; l
- $html .= "<li>{$t['cate_Name']}</li>";2 m; ^% W, X5 Q' S" @+ s. H9 k0 [
- }
! n- V U/ L6 \( K# X - else3 q% [' U3 I7 r7 _& s6 y
- {2 e+ o; _# j# ?0 X/ a
- $html .= "<li>".$t['cate_Name'];
% S# j8 ~! g3 c+ O - $html .= procHtml($t['cate_ParentId']);, f! t1 j4 w4 v+ ]4 s
- $html = $html."</li>";; r! C G; ~! o1 X5 ^& Q) e/ }
- }) B0 l$ S: v& J: F R! P6 k
- }: j* P2 r4 _: O
- return $html ? '<ul>'.$html.'</ul>' : $html ;& B9 E1 f G/ D0 q+ Q
- }% C% q& i# I8 S2 E9 k: d- q2 S" j
- echo procHtml($tree);
复制代码 输出的html的代码格式为:+ }* q( u5 Q" H C/ M" `
- <ul>
' o& k" B, o9 \* O5 j. Y - <li>往事如风</li>' f- ^- ^% B5 l& p! _) L3 _
- <li>水煮三国</li>
% e1 w2 m5 O# J* u k5 x - <li>技术学习
% X7 ]! c3 E. a" W! A% |6 ~$ q - <ul>) W1 S0 F4 R8 Y( G, A4 j6 d
- <li>html</li>
: T/ H1 j* d7 U8 p- a# O- b+ m# K/ K - <li>css</li>" r/ Y, O* a0 s) T
- <li>php
0 L3 i3 p. k$ u% r# }% S- J - <ul>
, H2 o6 p; U0 G - <li>php基础知识</li>
& R1 G& I1 m0 ]: m - <li>oop</li>
) l3 K$ J4 I; l2 y9 [! b8 E - <li>php安全</li>
复制代码 五.代码整合
9 @3 }' W; P. S. y. b3 v" |. ^- function getTree($data, $pId)3 y" m) e2 b+ f1 e2 Q" t F% y
- {. N5 K, d r; q$ h' \ K2 s
- $html = '';
0 [' D% e5 r! a- t2 z0 } - foreach($data as $k => $v) W9 ~% Y0 {& U7 e, G: w
- {
1 u1 e3 w1 h9 I# G5 E+ a+ n# R - if($v['cate_ParentId'] == $pId)
) d {5 q$ i, E4 e0 [: f - { //父亲找到儿子
( s8 U! j8 h2 \' Q7 P - $html .= "<li>".$v['cate_Name'];" H( @" l# ~- B( z0 U
- $html .= getTree($data, $v['cate_Id']);2 p8 I6 n! E/ e7 Q5 W
- $html = $html."</li>";% }* j1 C; k6 f' t2 O/ U6 D' O
- }
" d- _9 p/ {* r9 G2 l - }1 F" j: r1 }8 Y. h1 G0 K
- return $html ? '<ul>'.$html.'</ul>' : $html ;6 Q3 R% @" e/ ?/ W4 A5 H
- }4 G. B: R) ^' {+ s1 L6 n) k
- echo getTree($data, 0);
复制代码 六.增加CSS样式: I( F7 h6 c" R3 H! Y7 m
% @% E; k+ t/ `% [+ T/ L
% A2 k9 C4 h& z+ S% v; P第二种是从开源网站上看到的,非常非常的简介。" H j, I% ^7 A) t% J# w- K P1 a( x1 i
- <?php, v9 ~' J* q7 ~6 \: ]% b
- * W) p9 f [( B& k
- function genTree5($items) {
* E y4 \. R7 X! K* k - foreach ($items as $item)
$ @$ @3 K$ J2 g$ d- s' ] - $items[$item['pid']]['son'][$item['id']] = &$items[$item['id']]; / V0 J- ^; X7 r4 U, K& v7 t' p
- return isset($items[0]['son']) ? $items[0]['son'] : array(); ( T: x" E. @! g2 s7 T
- }
* u: B% y. R: H" S3 A+ k - * U: g V" Q! b z: o- H% o4 {
- /**0 u- z, v! V* J3 R
- * 将数据格式化成树形结构
; a3 z' B0 i0 O2 r( F5 r - * @author Xuefen.Tong
1 p8 l; f7 ~" i _' D3 A, Y - * @param array $items
$ Q. a, Z" @5 O - * @return array
4 `3 `0 x( V/ q% c4 ]6 m. k+ F4 b - */
6 N& t! Q- x3 J5 s; l - function genTree9($items) {5 k$ z( N: B% @+ X6 e \" C
- $tree = array(); //格式化好的树
) F9 A* D1 p7 Q - foreach ($items as $item)
5 J! n' R& g0 n! ~6 z& U. c - if (isset($items[$item['pid']]))
6 i8 Z; |4 M( \" S m - $items[$item['pid']]['son'][] = &$items[$item['id']];
% A) W- y6 _0 L9 l - else$ f. Z& z- [+ ^
- $tree[] = &$items[$item['id']];
9 }4 x) z! }4 s9 u+ a4 v8 P" x3 V - return $tree;( |, {9 o* |9 B& N7 N. f- ]
- }
7 U4 s% S9 J" k" [, L# S. V' y - ( G. ?' f C7 f- t' A
- $items = array(. ?3 S* G8 V) e% `! C
- 1 => array('id' => 1, 'pid' => 0, 'name' => '江西省'),( L9 {- ?8 J& ?
- 2 => array('id' => 2, 'pid' => 0, 'name' => '黑龙江省'),$ J& `- e5 S$ {$ K6 B! E
- 3 => array('id' => 3, 'pid' => 1, 'name' => '南昌市'),
+ j+ V9 G: Z& K) |# j - 4 => array('id' => 4, 'pid' => 2, 'name' => '哈尔滨市'),' \) T4 |) u: K9 ~9 W
- 5 => array('id' => 5, 'pid' => 2, 'name' => '鸡西市'),' y: F- y7 g' U k3 n& }
- 6 => array('id' => 6, 'pid' => 4, 'name' => '香坊区'),# W, J* e( [2 @6 b3 w0 w
- 7 => array('id' => 7, 'pid' => 4, 'name' => '南岗区'),
% @& z* g) g% E/ ] - 8 => array('id' => 8, 'pid' => 6, 'name' => '和兴路'),1 z- j6 a& |- s' a; V
- 9 => array('id' => 9, 'pid' => 7, 'name' => '西大直街'),
, S% z5 Q( }% l- h# o9 h S - 10 => array('id' => 10, 'pid' => 8, 'name' => '东北林业大学'),
/ I. Q3 @& T. U7 W - 11 => array('id' => 11, 'pid' => 9, 'name' => '哈尔滨工业大学'),
7 X$ }, {/ f: T, K" x- L5 E3 Y' }* t - 12 => array('id' => 12, 'pid' => 8, 'name' => '哈尔滨师范大学'),
# |3 r% |9 L( ]: E - 13 => array('id' => 13, 'pid' => 1, 'name' => '赣州市'),1 @1 D0 b- g$ y' H: l/ k' s
- 14 => array('id' => 14, 'pid' => 13, 'name' => '赣县'),
! w1 |( W# p9 u7 E - 15 => array('id' => 15, 'pid' => 13, 'name' => '于都县'),
5 I' U# w7 A4 E0 D' w5 l( [ - 16 => array('id' => 16, 'pid' => 14, 'name' => '茅店镇'),- Y$ L {; T+ h3 E# w
- 17 => array('id' => 17, 'pid' => 14, 'name' => '大田乡'),4 v* D& N& B' l8 o2 ?6 a
- 18 => array('id' => 18, 'pid' => 16, 'name' => '义源村'),7 N8 y, V; c7 U& R$ f5 }3 o
- 19 => array('id' => 19, 'pid' => 16, 'name' => '上坝村'),* Z8 B' k0 b4 w& ~
- );
- y |. }0 ^/ L R6 W' v! j- ` - echo "<pre>";! h5 a6 o& d V! x
- print_r(genTree5($items));
' x; B6 N- v4 I5 y3 s1 m - print_r(genTree9($items));
" n7 w r# G* l# X( B! X' o -
0 N/ _' \, F) T$ \ - //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
* ?) S) {& V$ Q: ]4 Q* ]4 L! k; Z5 G - /*
0 G) q* G! P5 a1 z8 t. Z - Array3 P) _) a2 s, K/ l* P, \7 }
- (, H5 h$ {% N2 l7 E8 B
- [0] => Array
* q _! g( z9 w - (
4 k7 A4 B+ V2 W3 j2 ^$ P0 q. S - [id] => 1$ h- x3 S! V: w0 u5 ^% J
- [pid] => 0; ]* N U( I- N/ x
- [name] => 江西省" S+ p. R( }: w+ ^+ c
- [son] => Array
L; J( [5 @- C& Q5 n$ x+ | - (
& V% d _/ U+ l2 h4 N - [0] => Array7 H3 f, S* z" J8 ^, M: o ~
- (
" ^9 n" M7 r3 q7 V( B+ L - [id] => 3" ^% ?" I. m2 j8 ^; b/ v2 S# {
- [pid] => 1
# `$ \3 r, }( _. R3 z0 W( F0 @8 Y! F - [name] => 南昌市( t: k: U: a9 e$ Q$ l* y
- )* }5 p3 q8 e; L- `& d
-
' P2 {4 P" M9 h' Y1 J - [1] => Array; [3 c: _# z6 J9 |, ]5 G7 U! G0 J
- (' |& T* w. i. t/ E T g' Y
- [id] => 13. V4 g. l3 c: \6 C1 `
- [pid] => 1
2 K6 O+ i/ M' X) j6 X" \ - [name] => 赣州市
: W9 Q) O5 C) y - [son] => Array1 v0 O5 p, V$ M5 p6 P+ T( K/ F( t
- (! C) j% j; ~: B1 e4 X, `
- [0] => Array7 j; \4 f6 G1 {' q
- (6 x1 d" S+ k# y/ A9 W- l
- [id] => 14( _. K/ }7 Z! h1 Y8 z
- [pid] => 134 X5 p6 I$ o* F3 E
- [name] => 赣县
) U, ^' I* l2 y2 | - [son] => Array
; f9 I5 N5 m! q: p) o, L. T1 ~* P - (2 W* r( }" V1 ^" a4 H; K! R2 h) E
- [0] => Array8 L8 D5 b( a E+ O& \" @
- (3 K4 R8 j/ N1 ^7 |& ? {2 g
- [id] => 165 m- h5 d2 ^. ^( v9 _7 s% M5 N
- [pid] => 14
) t7 F) g/ C v: r7 m& ^6 d- Y' i - [name] => 茅店镇
& E* S$ \8 G% Y - [son] => Array
0 W4 ]) k! X1 Z# W5 H - (. Y4 n/ \: `/ g& R. B. Z
- [0] => Array
3 v3 p' w: @* G5 P; T D& H# Y. { - (
5 F& ^9 r! t1 l8 Y+ @ - [id] => 18- M: q$ _+ w! _- F3 `
- [pid] => 16
9 B1 ~- _- T; v* f8 d - [name] => 义源村
) p6 u; q' o' ]( e: \: R+ h - )/ Y0 i \2 x0 M. F7 f3 ?- o/ R0 E( g% i
- , ?; X( Y. ~8 U: w% D% |
- [1] => Array- Q% ]4 q) [" }) n$ L9 w( z
- (8 N; i6 n. d8 @' m- O6 l
- [id] => 19. H' T4 }) V) r2 D: w! F
- [pid] => 16
# u% O9 S, n$ H" i6 k - [name] => 上坝村
( v# S2 @6 G: ]. D+ M, c6 J4 d! T - )
& v5 c# ?2 J5 t) K3 b" D6 x! @ B - 9 ~# ?2 S' }% H5 S) s" ^" g! f: H
- ). c3 \7 b9 p5 z" f& @0 k* N# U
-
4 l R6 \; p; [2 d; p+ K$ T- M - )" x& ^ W7 \4 x" v
- ) q g; a% E8 a4 }7 W- P
- [1] => Array- j" a3 D \! j F, N6 V+ k+ I( [
- (+ e, R) {" U+ H/ p" P$ ^% j# a1 ~
- [id] => 173 h8 U" d% @) u
- [pid] => 14
5 _( ^. h; R; \( U& ?, E/ c! k - [name] => 大田乡
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- [id] => 15+ }( K" B% F! A0 e
- [pid] => 13/ T @& C! u* L7 D0 C
- [name] => 于都县" ~- G8 i3 a6 a2 }+ {1 E
- )
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- [1] => Array0 ?6 S) h2 r$ D( K5 o" Z! S
- (5 n1 v7 C" X! c. [
- [id] => 2
% T3 }7 m& d; I. m$ E - [pid] => 01 ~0 D* Y# z! M0 V
- [name] => 黑龙江省; C- N" I* s1 f
- [son] => Array. Y' _; ], z `. w9 L
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- [0] => Array
0 q6 z# t# V2 f+ I' S - (
; I, d4 t$ s3 W - [id] => 49 D( G4 A/ \: I* A( g. F
- [pid] => 2
4 |! P2 d! }" m: r1 v, p - [name] => 哈尔滨市' W% s# G% O5 e+ W
- [son] => Array' ?) {: E( _: x$ v: P. _
- (
B. ]$ k# v) E4 G, O* F - [0] => Array3 ~$ u* {$ q* b& }; Y
- (
% b! t* e+ P1 h- I - [id] => 6
! {2 @% J F9 r; u" {4 F - [pid] => 4
$ y. C6 _, ~& k - [name] => 香坊区+ f) F& G6 F4 V7 c+ @
- [son] => Array* B5 k8 w) ?% p; H
- (
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- (- q9 M; v4 U, a' N3 K
- [id] => 8+ `# G! z" z0 |- j
- [pid] => 6
% D' y6 c& B, x+ q1 ~% `( z - [name] => 和兴路( x" l2 J: G5 M, G0 G7 F7 l9 \4 t7 @
- [son] => Array+ o) l9 v% q" s
- (
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% Z- t# e0 s# l7 y - (
% b# E' n9 [2 \/ I' m - [id] => 10( d4 z- X( S. z3 _# X; x4 ]
- [pid] => 8
: x0 a2 i0 s/ M# W - [name] => * n( b1 z/ [/ i; K, ]# p6 l3 f
- 东北林业大学
4 T2 q7 W; w3 M - )5 O- g6 N7 p* d* L) B
- 3 A' ?3 V# ]. t/ r% W
- [1] => Array
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- [id] => 12
0 e \1 Y+ e+ D: ^. ^7 g" N - [pid] => 8
- z& f1 d6 i3 \- [, z7 ~ - [name] =>
! l' x/ |5 `; U3 M - 哈尔滨师范大学
2 x. d. O/ i5 f - )7 A1 {% S: d9 G. z) B( N
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-
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- (" f9 K+ K9 T5 \' Y9 s% r
- [id] => 7
: `3 b3 k* p& i$ u - [pid] => 43 E) C; |+ ?' H
- [name] => 南岗区+ K" e& w5 F" X! M) ?4 ]1 M3 k/ k
- [son] => Array# B. c- _2 G4 T* g1 Q& Z
- (: c! j8 F1 N: U2 s
- [0] => Array
4 k6 P2 G. X8 D, P - (
. _/ T; U# B+ c' E( u! c2 n- O - [id] => 9
1 y# E- J3 B8 A, x2 j - [pid] => 7
6 m; j# n" O- C5 C( y5 M - [name] => 西大直街% t5 G. B! O5 M0 q
- [son] => Array
! x y" ^4 P* Y# A9 p% t9 h - (# H; x2 U+ L2 ^
- [0] => Array& w; l# S; U7 H! b' q( [
- (
. P4 \- C. i |1 l, u; [& C - [id] => 119 x, v+ A W& p4 H
- [pid] => 9
7 l0 d/ X, X# p( `; Y+ Q; h - [name] =>
4 k: M2 m8 Q: I- E+ N - 哈尔滨工业大学+ `, u: K0 l* ?+ V2 C$ p! y" m
- )
# N' I3 L9 j- S) k, Q" d' B -
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- 5 q" z, l5 T& {
- [1] => Array
3 ~! _* R% Q% C( l0 ^4 c! o% A \ - (: I1 U$ r. y+ s# h7 E
- [id] => 5
$ {5 i% ^/ h s* E - [pid] => 2
7 v5 t0 x2 m1 m6 N1 K1 b - [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。0 e" `8 n6 K9 J" H; c, W: y
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