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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。% g, Q7 P, V C5 ?
一.数据库设计9 ^8 D5 y' t) ~, }3 c, K1 {; Q
- CREATE TABLE `bg_cate` (
' D) `) c3 u4 R. ? - `cate_Id` int(30) unsigned NOT NULL AUTO_INCREMENT,
2 j8 S/ G% p! o& |: H% _ - `cate_ParentId` int(30) unsigned DEFAULT '0',
+ ?1 Y6 S7 T( S! B - `cate_Name` varchar(100) NOT NULL,
0 v% ^+ ^5 ~. p9 h6 ~2 W - `cate_Intro` varchar(500) DEFAULT NULL,0 T5 k) _$ b5 ^! g5 k
- `cate_Order` int(30) unsigned DEFAULT '0',7 L* ~2 i8 l5 T- q
- `cate_Icon` varchar(100) DEFAULT NULL,: _! W+ V4 x. K% I& C- C3 ~- T
- PRIMARY KEY (`cate_Id`)
1 f2 s- }- F2 u0 \5 i - ) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=34 ;
- p; E4 \( g0 {$ F - --) G% n4 Y2 E4 W6 m& ]) p8 Y( L
- -- 导出表中的数据 `bg_cate`
$ u: t8 g6 `0 ]# M, T - --
* m/ O* C% [& P/ X - INSERT INTO `bg_cate` (`cate_Id`, `cate_ParentId`, `cate_Name`, `cate_Intro`, `cate_Order`, `cate_Icon`) VALUES2 O8 W" {: G* r' t% ?- Q
- (4, 0, '往事如风', '记录往事', 0, 'icons/6.gif'),
( B# A$ i/ [% w% q+ f - (5, 0, '水煮三国', '品位三国智慧', 0, 'icons/3.gif'),9 b+ j5 ?) t* _7 l( z
- (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'),( R- q( f0 F) _4 V
- (3, 0, '生活点滴', '记录生活点滴', 0, 'icons/2.gif'),% d3 O* u* {/ n( w3 r' k _& B
- (6, 0, '栀子花开', '青春无限', 0, 'icons/8.gif'),
A0 r8 f- S) o) G6 e - (7, 0, '假日休闲', '悠闲、自在', 0, 'icons/24.gif'),) Q+ ^ ?2 J( C* ?- M8 _: G
- (8, 2, 'html', 'html学习', 0, 'icons/1.gif'),; x+ v9 g( r4 Y% d, F( Z4 C
- (9, 2, 'css', 'css学习', 0, 'icons/1.gif'),
3 n+ _$ A0 z( T7 Q H5 W% l - (10, 2, 'php', 'php学习', 0, 'icons/18.gif'),' F8 C5 c: f9 f
- (11, 10, 'php基础知识', 'php基础知识', 0, 'icons/1.gif'),* K t1 O+ J# ^$ Y
- (12, 10, 'oop', 'oop', 0, 'icons/1.gif'),: b* _3 `. f b$ ?$ S. F( n, ~
- (13, 10, 'php安全', '讲述php安全', 0, 'icons/1.gif'),
3 b( e$ I8 ^2 V" A( r8 e - (14, 10, 'seagull framework', 'seagull framework', 0, 'icons/1.gif'),
+ L0 b9 h1 J- I/ f' c - (15, 2, 'javascript', 'javascript学习', 0, 'icons/1.gif'),
; G5 H9 b3 {# D) M - (16, 2, '设计模式', NULL, 0, 'icons/1.gif'),
: h# t w( c2 L7 L) k: N9 E0 N - (17, 2, '软件工程', '软件工程学习', 0, 'icons/1.gif'),
5 I+ m- g ^3 r8 E - (18, 3, '厦门生活', '厦门生活', 0, 'icons/8.gif'),5 D& G8 f' n, ~% u y
- (19, 3, '大学生活', '大学生活', 0, 'icons/8.gif'),
8 x! z- ^6 S) y% l - (20, 3, '童年生活', '童年生活', 0, 'icons/15.gif'),
1 R9 E, B7 T. E& R# d" A( C - (21, 19, '学习', '学习', 0, 'icons/1.gif'),9 H6 G% o* @2 L0 B7 o; l! c& f
- (22, 19, '运动', '运动', 0, 'icons/16.gif'),/ F4 e) _+ X6 L# V9 N/ m
- (23, 19, '旅游', '旅游', 0, 'icons/24.gif'),7 [, z$ A, D z! B9 k. j; \& Z3 z+ x. b
- (24, 22, '排球', '排球', 0, 'icons/9.gif'),
2 W) V/ ?7 A* s- T+ F - (25, 22, '篮球', '篮球', 0, 'icons/9.gif'),: f5 e1 h6 q0 A& T* j% i
- (26, 22, '羽毛球', '羽毛球', 0, 'icons/9.gif'),! w5 X/ w. @0 ?! s$ _) O7 Z$ ^
- (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。0 k! s4 {; C7 H g( C" m2 e8 F# V; Y- p
- require_once './classes/MyDB.php';
4 O: f( K E, ~ b J9 F - $con = MyDB::singleton();
, L% K( P# p5 w5 L3 E. U4 r - $sql = <<<SQL
# j8 w& \/ C0 s, p; r1 H* A - select * from bg_cate cate6 G3 R( r0 p, k$ p, m
- SQL;! c8 {8 P9 P' F/ G( y1 ~
- $data = $con->getAll($sql);
8 P Z, K$ i% t - //print_r($data);
复制代码 数据库操作我用的是pear类库。+ b) L7 T; Y% ?; F8 F
最后的$data的数据格式如下:
6 d2 y! v9 H* E% s; w. @4 t- Array' B7 t7 o' h* j8 A
- (
1 S5 R8 k8 N, ~4 \5 Q' T6 s) Z - [0] => Array) G0 U6 d) G& O
- (
5 y* p! q8 g! i# W& M/ N - [cate_Id] => 4
& G6 u0 D# Y1 u) j" F - [cate_ParentId] => 0 _: L9 X& v) N
- [cate_Name] => 往事如风
5 t0 i2 v' K, X k$ H3 r - [cate_Intro] => 记录往事0 J% I: Z# K4 O: J3 w# y
- [cate_Order] => 0
4 T) A/ f! V( v* m2 r% T - [cate_Icon] => icons/6.gif6 Q: l9 N& Y' p: V; X
- )7 c4 F. r! Z5 I2 T
- [1] => Array
3 i$ d2 d& a( _/ S - (
* b- p M4 b5 g4 h) F! Q. S: J - [cate_Id] => 5
; ^/ \7 Q6 k, ?' A8 S/ m - [cate_ParentId] => 0
) x& f: b3 |* c4 Y0 L( [ - [cate_Name] => 水煮三国
+ U. X5 u+ w0 _4 _: \ - [cate_Intro] => 品位三国智慧
2 a1 m, X. B1 k8 n+ Z - [cate_Order] => 0
- _2 G" _* l% t4 F% h - [cate_Icon] => icons/3.gif; I5 A2 F. ~0 j$ j0 t7 L n3 I
- )
复制代码 三.把上一步的数据转为树型状的数组
2 v7 P' x* s9 n: \; V8 g代码如下:8 ?4 e) g* ~- D+ W1 C
- function getTree($data, $pId)/ G \& k) i0 E* `" \: Z4 s4 l+ y k
- {
" u) D% @- f4 V" ]7 b5 C2 g. Z3 P - $tree = '';
3 q, n5 X0 E: ^& x* ]+ d - foreach($data as $k => $v)
) R0 E3 ~4 i' X5 f2 A' _" m - {. h% `8 U. L2 s
- if($v['cate_ParentId'] == $pId)
7 o4 H; o& x C, Z j - { //父亲找到儿子
* H; ]$ b$ D6 g# J. b* C5 _7 H; o - $v['cate_ParentId'] = getTree($data, $v['cate_Id']);
' U! w2 Q$ ^" \% c% i2 |+ Z, B - $tree[] = $v;8 F: j/ g. v+ D* T' }/ g( h. N! I
- //unset($data[$k]);2 A8 @9 M9 Y) N# ?9 s
- }3 S" H; t0 b: V3 W% y- [# S; D, b
- }
' }) z8 n. @ A* Z - return $tree;% E y- ]# s, P
- }) Y$ |8 W/ X. B# ?; A: |. C+ O0 L \
- $tree = getTree($data, 0);
复制代码 最后输出$tree的数据格式为:; b) R. m+ U% e# f8 m8 u+ o. e" q
- Array
" P* t" W+ j. O4 V - (
3 S; O# Q& Z' R+ D4 L - [0] => Array
# \1 n7 `) P1 m/ d. o. _ L - (
4 N7 }6 ^6 Y2 H7 Q" p8 ] - [cate_Id] => 45 c+ b3 Q* t5 ?) ?! k
- [cate_ParentId] =>
* b% e+ A( u3 Z# T, }, R" ? - [cate_Name] => 往事如风
$ y6 ]. R% N% P1 m - [cate_Intro] => 记录往事1 ?( A- f t2 Q) Z, R8 D' r
- [cate_Order] => 00 r& m4 S* a4 |& b2 ?0 u! P& w7 c# _/ v
- [cate_Icon] => icons/6.gif
& X/ m ?0 v6 K+ X - )
7 ~3 D' ~$ J. v+ x; E - [1] => Array
0 r( \: M- V& W& o# m( f: M - (
# J0 r" ]8 e- o8 L+ h - [cate_Id] => 5. c: W8 e2 O" o8 L5 [( w
- [cate_ParentId] =>' ~+ D* @3 d/ \: e* C u- b1 c
- [cate_Name] => 水煮三国* ^4 u% w% t1 f4 `' D+ |8 [4 a
- [cate_Intro] => 品位三国智慧6 y- C. s" B% o# b7 t
- [cate_Order] => 0! T, t. O5 [2 L
- [cate_Icon] => icons/3.gif2 S# B2 v3 ~9 H5 X ]3 T
- )% z* `: y# @' M+ D
- [2] => Array
" A0 y# B& J+ }2 ` - (
) Y- n m4 r( \- t. _+ x - [cate_Id] => 23 z. j R C+ G9 [( z( R9 V
- [cate_ParentId] => Array
# L; l5 Q) \+ T# ^$ \, C7 z - (
1 c9 Y# u, T5 q! a5 j9 `4 { - [0] => Array. r4 d E( E& u+ |
- (! T/ J# r" ~) a
- [cate_Id] => 8
, ^* G, V+ w1 C' L- _. E3 d - [cate_ParentId] =>0 \" q9 B: j8 n3 Z) t
- [cate_Name] => html
. ^- T9 ^1 |: s$ H1 }8 `: O2 T( f - [cate_Intro] => html学习
q8 N9 g8 T( v- \ - [cate_Order] => 0
# D8 f$ x/ v; h! ~7 c3 c - [cate_Icon] => icons/1.gif5 x/ n/ O8 @0 r6 J
- )
复制代码 四.把树型状数组转为html
* L {$ T+ S( {, m代码如下:5 J. \3 {# D9 D" Z6 F, d/ n+ b7 ?6 c C
- function procHtml($tree)$ n6 K6 V2 F: Z- t4 J, {- S `
- {& U/ O% U2 n+ a# A
- $html = '';. \) i- r. z5 h
- foreach($tree as $t) {8 i! A+ M3 z9 y5 Q: F
- {, v, S, n7 N, ?9 B
- if($t['cate_ParentId'] == '')
' {6 b! D1 h8 N! ~0 \" j) Q% G - {
# g2 m& l8 u* }" Y6 w - $html .= "<li>{$t['cate_Name']}</li>";
3 E3 P% V$ V7 t4 ?# p1 x$ @ - }
# J8 y* a4 ]4 ]* w( V' o - else
. o8 a) p6 q$ s0 U& r9 Q - {
# J( t& p+ T5 m) m: m0 `$ ]6 c - $html .= "<li>".$t['cate_Name'];# Q, \% W3 B) G6 b
- $html .= procHtml($t['cate_ParentId']);: \, [% _% P* Y) ^$ O
- $html = $html."</li>";
" z5 l# F2 V' G8 P - }
+ n0 |( s: [8 O - }
9 Z9 ?% }* o c% }1 k8 u - return $html ? '<ul>'.$html.'</ul>' : $html ;
% x4 X, o. e w- A6 U5 { - }( Y Q; J) {+ n: e' T) ~3 `% ~
- echo procHtml($tree);
复制代码 输出的html的代码格式为:
7 O# _9 Z; t. z4 s; e$ ]- <ul>1 S6 }2 s) k/ V% U6 E+ `
- <li>往事如风</li>
4 [* |, d# |* q% D. x/ P3 M: I5 f6 [ - <li>水煮三国</li>
/ M+ s {; L& i4 X& [' b% g - <li>技术学习; _" U( x2 S9 w u$ ~2 A& a: r
- <ul>; X! a7 _3 O8 l( K
- <li>html</li>2 j* p4 `7 o8 z& k, V B! M" @
- <li>css</li>
' u+ N W* K* x" }& e - <li>php% a7 V: k! A6 B8 ^1 ]% B, \
- <ul>
7 T, }1 U8 [+ l- O% k0 n8 N5 ] - <li>php基础知识</li>
: O+ o A! a; s/ o& N - <li>oop</li>
4 D# a' U0 y' b& F3 L - <li>php安全</li>
复制代码 五.代码整合+ P% m+ q. b8 O3 k) T
- function getTree($data, $pId)1 S7 A- R g5 e- b/ F
- {1 A6 W* q! P1 j3 K) I( c( t& Q; p
- $html = '';
1 y5 K- f4 Z8 o$ M& p - foreach($data as $k => $v)# n2 ^( D Q% O, i! r2 _2 J
- {/ j+ u; i* z# ]4 J9 n; D% g4 I6 ]
- if($v['cate_ParentId'] == $pId)( t8 |0 G4 c' l1 O
- { //父亲找到儿子3 c4 {' ?' Z; y7 N1 x$ Q
- $html .= "<li>".$v['cate_Name'];1 @: J# }# W4 O+ u1 z! Y
- $html .= getTree($data, $v['cate_Id']);
5 ~: h9 \& H5 Z7 v5 F- ^ q - $html = $html."</li>";& F! p5 K! S9 I' r
- }+ ~" A! G; P' J% W3 o
- }* g/ ~! a- b& Z0 X( y
- return $html ? '<ul>'.$html.'</ul>' : $html ;0 O: M+ Z1 Z% S- D: l( s& d9 M
- }/ g3 t5 i2 ^" y2 U+ c/ P
- echo getTree($data, 0);
复制代码 六.增加CSS样式/ v6 W6 E' |/ `% d
* j) K5 {% W+ n/ ^3 K& r$ x
7 Z+ d. L) K0 j' U+ J: ^' C* ]' j第二种是从开源网站上看到的,非常非常的简介。
( ~$ o# d' Q& \2 E- <?php3 ~9 j" R, n( y3 H0 z Y( F0 V
- # B( p' `* m2 B( W% _! P
- function genTree5($items) {
' u! N% g9 F1 v" h, e1 y - foreach ($items as $item) 8 D6 @( y$ s1 U4 T
- $items[$item['pid']]['son'][$item['id']] = &$items[$item['id']]; # o, C8 X' Y0 v% }
- return isset($items[0]['son']) ? $items[0]['son'] : array();
( L! I+ V+ Z5 o4 e - }
8 H {) h" b: e5 r4 T1 d0 c- l - : ]4 A: x" M$ Y! i! ]
- /**; y0 E) ~6 K. G \
- * 将数据格式化成树形结构5 b" {2 L! F% }; K9 Y5 v+ ]
- * @author Xuefen.Tong
- h$ x: V- L t- u/ v3 | - * @param array $items3 y% l/ a% R: w8 n* I
- * @return array * r, h# A) u: R, [4 H- { O
- */
5 U; p$ O. C2 e O. ` - function genTree9($items) {, T" P. n" M% A$ e& p6 H" [4 ~3 h7 g
- $tree = array(); //格式化好的树3 ]5 j' L$ m6 v
- foreach ($items as $item)
, I, ~, L4 T7 }1 G, H) H - if (isset($items[$item['pid']]))
: z; r& y) X' N+ I( W8 R - $items[$item['pid']]['son'][] = &$items[$item['id']];) j+ F; ~7 W' X) Y
- else
e$ \. @ ]" k6 D& \ - $tree[] = &$items[$item['id']];2 ^1 b. y6 y' w
- return $tree;, {4 ~! Y; C/ {+ ~) l' P2 d
- }6 \' e2 r! q. n+ [" |" _1 G0 [
-
0 L& A+ [5 R; t5 g3 z4 q - $items = array(
d( W; ?* k+ o2 N) j - 1 => array('id' => 1, 'pid' => 0, 'name' => '江西省'),
& j5 R" K' |8 p8 v5 _ - 2 => array('id' => 2, 'pid' => 0, 'name' => '黑龙江省'),
0 D- x8 Z! H0 V* y$ }5 q% d/ m! C - 3 => array('id' => 3, 'pid' => 1, 'name' => '南昌市')," j4 g/ t2 N+ X) H; R0 x
- 4 => array('id' => 4, 'pid' => 2, 'name' => '哈尔滨市'),
3 m9 f5 O/ ~/ R5 Z3 f0 \5 B - 5 => array('id' => 5, 'pid' => 2, 'name' => '鸡西市'),3 E5 n+ E0 r- Z2 @" u! o, h8 z
- 6 => array('id' => 6, 'pid' => 4, 'name' => '香坊区'),* m7 v7 u8 J' @. G' N1 U
- 7 => array('id' => 7, 'pid' => 4, 'name' => '南岗区'),7 G, {. y6 Q& a3 W; E$ p' l7 m$ {) T
- 8 => array('id' => 8, 'pid' => 6, 'name' => '和兴路'),3 K4 @) ]1 \4 O; A% R5 H! ^
- 9 => array('id' => 9, 'pid' => 7, 'name' => '西大直街'),
) n% |& c7 b) f$ H5 J - 10 => array('id' => 10, 'pid' => 8, 'name' => '东北林业大学'),! f! i- A8 S! x2 x/ `5 j% b8 J
- 11 => array('id' => 11, 'pid' => 9, 'name' => '哈尔滨工业大学'),* \# |8 y# x1 ~8 Z# ?) z5 D. j
- 12 => array('id' => 12, 'pid' => 8, 'name' => '哈尔滨师范大学'),
4 Q4 X1 ~5 a$ ]9 c3 `% E1 o. y8 j - 13 => array('id' => 13, 'pid' => 1, 'name' => '赣州市'),6 M' V+ |6 q0 O$ e* c# D/ T
- 14 => array('id' => 14, 'pid' => 13, 'name' => '赣县'),
$ X, V9 K$ P3 w% A - 15 => array('id' => 15, 'pid' => 13, 'name' => '于都县'),
! p- f+ k6 a8 T5 O& j - 16 => array('id' => 16, 'pid' => 14, 'name' => '茅店镇'),9 h! r. @5 U/ G: m, \" ?( m# W! C
- 17 => array('id' => 17, 'pid' => 14, 'name' => '大田乡'),9 I7 }& |5 B1 L7 X
- 18 => array('id' => 18, 'pid' => 16, 'name' => '义源村'),. `( \( Q, `* Z
- 19 => array('id' => 19, 'pid' => 16, 'name' => '上坝村'),1 ], j( G4 g' [' \* @; r
- );' G: [7 a1 Z3 T, T' ~/ n) b2 \2 v
- echo "<pre>";
3 g/ s$ s$ ]; p+ K* o# ], w& h7 k# d - print_r(genTree5($items));
% n( @1 f8 ^4 ?+ D8 s* A - print_r(genTree9($items));- J: `4 O6 w3 p' ^ B M+ g
- # [6 g, S0 N1 V7 |6 K* z) F
- //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& L1 b; b2 _* g! X7 |/ {
- /*
8 P8 K" h. b2 O6 ` e0 N - Array% w" Z4 T4 o7 H ~1 A
- (
) n* M4 {4 G* Q - [0] => Array
. h }5 J8 O9 g8 \ - (* \" `1 |+ ~# S$ E( \, R/ n- s9 t- u
- [id] => 1
. z: N% U* s5 r8 K - [pid] => 0& z" h& z) H: h: g
- [name] => 江西省
2 P9 q! z6 w/ y. v3 p. [8 D3 y - [son] => Array0 q- Q* |* h1 G8 V B
- (
$ N& ?- t7 j, H4 N - [0] => Array% S) J& H! h+ C4 @+ c
- (
$ h' Z& J8 e" [ - [id] => 3. b' a8 L5 t8 Y i0 ~
- [pid] => 1
* Q7 J2 [4 Z; z' \' u - [name] => 南昌市$ d3 A8 Z4 S5 a4 p% u) L* Z
- )
- k/ J, s- D7 ^1 @: F7 { - ; T- g t% h' \* a# N
- [1] => Array
# ^" i) k& I# d' e5 u9 m1 T; W - (9 t x4 \. h% A7 p a
- [id] => 13$ r, Q9 K& K" I- s! o3 t
- [pid] => 1
& T) T, w. T; [* h - [name] => 赣州市
9 n5 e" s, ]& R/ s: |2 y - [son] => Array
3 w4 n* B: D5 M - (: U% l) Q7 @' ^ P$ I
- [0] => Array' _8 r' {1 Z9 L2 y8 E0 I. s# N
- (( S" ~% u4 V: {! W
- [id] => 14# u l/ _* R2 H4 F9 |, v+ U
- [pid] => 13
' r G. j+ p. f1 K) ?) U0 i! O) \ - [name] => 赣县
% A$ F7 E" }& K0 {5 o$ E1 h; m - [son] => Array
- Z. }; s# ^& V, B% J - (
8 E" f. p0 Z9 M - [0] => Array
/ k. q; C) _6 K* P+ Y4 o) W1 a - (# @8 K; F0 H, N
- [id] => 16# e" k( m8 Q8 ^9 o* D
- [pid] => 14( L7 k% m0 V7 y) I) F4 h" b
- [name] => 茅店镇( J: f6 t4 N$ r, c) Z
- [son] => Array6 z# i3 x. _* E
- (# \" _% e, D `5 U9 X5 m: F
- [0] => Array
9 B6 H# r) J8 s; ~/ O" L - (* v# o* m9 ?4 V, ]8 }% s* h# a
- [id] => 180 I) i7 C) k1 m& C9 F9 ~
- [pid] => 16
) j( v0 X! ]% C6 u T - [name] => 义源村
- H @3 |( P0 Q! F2 T - )
, P2 ?6 _8 i# ~ Y5 R - 2 `8 [. d: P( H- f
- [1] => Array1 n; E9 _) o6 h/ v. }; v1 [
- (, V! G- [7 Q) x$ t- q! T6 O
- [id] => 19
# E, Q: m5 ?3 G+ r L/ Y+ o - [pid] => 16
; ?3 q: l: k; i, c" ~ - [name] => 上坝村$ |) _/ [ A3 O! O6 A( q2 O
- )7 Q9 K) P; I+ z' {2 h6 ]& c
-
2 \2 N) X7 O- P7 d; }, o1 A$ | - )- {! T0 N: A+ i; u
- 3 y) X h/ V; G* N8 p! D
- )- Q, N1 {& T. l9 x
-
) H0 e, |3 q/ ~+ `2 N/ o - [1] => Array) F: W: [: B' L# |
- (
9 H9 L% E( g4 S6 @9 n$ W - [id] => 17
+ `' F: |3 e- V+ N' X& x - [pid] => 14+ G% S5 }2 {% U c3 g
- [name] => 大田乡
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- [1] => Array% W' v6 H$ ~1 m3 R
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0 T; K5 S/ i" Q% M* c - [id] => 15
& C& f" m2 B! ^' [$ Q5 Z - [pid] => 13
9 C! z6 j5 ~& {6 \) a" ] - [name] => 于都县" Q9 G4 C2 O& A( x! O
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! A) f5 k( H9 @/ c* n( c - [id] => 20 w' q/ g. w. w
- [pid] => 0- J$ M7 l3 f y+ s0 j# V4 Q2 p
- [name] => 黑龙江省
$ ]3 I* T- `. U - [son] => Array
& h+ e: f F5 a1 E* @ - ($ T4 R1 ` g4 F" y
- [0] => Array
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. g/ r$ X+ e5 l - [id] => 4
, Z/ _6 o! o9 [' [ - [pid] => 2
% a) I" T% e5 c - [name] => 哈尔滨市
5 {0 ~% l' g* ^ - [son] => Array
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# n% R( q7 B, Q0 f. k9 \7 [ - [0] => Array
8 a5 J* Q, h0 O, ^ - (3 F0 C8 o |8 [
- [id] => 6
! ?, K+ v% }, }* v9 I/ y& O6 R$ t - [pid] => 44 P1 ~' p0 q' T# X0 V) d0 S% Y
- [name] => 香坊区
/ |9 w% C# M$ L) V" h8 g' ]% G - [son] => Array% y0 C: R: h; v. n {/ j
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- [0] => Array2 F/ \ N- U, j* o1 a" H5 E
- (8 h! S/ w& B0 q- M8 |/ h" [ ^- p
- [id] => 8
! a9 C& K3 B, f+ m- }( R$ A - [pid] => 64 n- X/ s- m. T) O
- [name] => 和兴路' z. c& p# h2 m$ c2 o
- [son] => Array
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- [0] => Array
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- [id] => 10
) ~ Q0 o& w+ q/ i2 Y; N5 P9 Z/ h - [pid] => 8
& B! ]' i7 I- ^7 h% ~8 e0 W6 d - [name] =>
" s# V, D2 I6 H - 东北林业大学/ F& P* b+ i# ]! {2 N$ g
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, g* T8 l/ K) e: }/ q4 _( Z3 Q - [1] => Array
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. A, y8 C* _9 Z9 T! i8 j1 ] - [id] => 12# N5 i8 H3 z, p* E* X x5 P- w
- [pid] => 8. M$ b; {& j. ~$ V+ p- v
- [name] => % d4 C. r$ g( I% K- [
- 哈尔滨师范大学9 Y' k7 ]& o6 S: k
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b8 [: b- x! @/ O" K, M - [1] => Array
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- [id] => 77 F2 N% U1 M8 ]; M- Y
- [pid] => 4) E6 z0 H& i9 W" N+ F+ u
- [name] => 南岗区
' g! ]; y; G* m4 l$ z) F5 t( F - [son] => Array7 ^1 G/ r* _, _: @' ~7 v
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- [0] => Array1 c7 k( O4 d+ o3 w0 g" ~1 e
- (8 q6 M$ D# r- `5 S0 F
- [id] => 91 O V; c* N* \6 y1 M
- [pid] => 7
7 |& L4 l" s0 I; ]& c: m - [name] => 西大直街
/ }1 O) @" |0 t$ @ - [son] => Array/ Z6 U1 \0 e: \0 U8 t9 H( j
- (, e6 {' W( P! t3 |4 Y7 e
- [0] => Array' Z& ?! e7 y& l) o
- (
1 e0 d6 S: g _/ B9 r7 ^$ { - [id] => 11$ B0 v1 Z; x5 G- z
- [pid] => 94 R# X4 x- e: `! e
- [name] => l h6 Q7 A c' M6 P) }6 p9 M' `
- 哈尔滨工业大学
$ B4 |0 b9 N1 f$ J* l. R - )
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- (+ Z. A0 l1 s& r% A2 P
- [id] => 5, [" O9 v2 ?, ?% K
- [pid] => 2' f) F% M* E; C Y5 k% o
- [name] => 鸡西市$ P7 C2 j* s; f7 }9 U3 g* S' N
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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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