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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。
2 L* G- n& ~/ K+ I# }一.数据库设计
8 y$ R: g W* j6 k, B; N _! @- CREATE TABLE `bg_cate` (
5 n- T6 h* M" r5 I7 Q1 a+ g& M _& g - `cate_Id` int(30) unsigned NOT NULL AUTO_INCREMENT," P# V' H2 t" o+ W6 A4 N4 Z- V3 ^
- `cate_ParentId` int(30) unsigned DEFAULT '0',
2 D5 i8 e: {1 a, Q! l - `cate_Name` varchar(100) NOT NULL,4 ]/ @+ }$ Y6 G: y2 v; I
- `cate_Intro` varchar(500) DEFAULT NULL,
F3 Y- [; c. W& E* K. { - `cate_Order` int(30) unsigned DEFAULT '0',% Z8 o6 `1 ~4 H) R. l- O+ Q- x
- `cate_Icon` varchar(100) DEFAULT NULL,
+ S$ p: I/ u4 G6 @ - PRIMARY KEY (`cate_Id`)
- i$ d3 c9 H9 u- c - ) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=34 ; ?" |8 E/ I2 H; e" K& S6 p; Q3 F* t
- --% }1 ^- q2 T7 M$ B
- -- 导出表中的数据 `bg_cate`
- u! y0 M; p3 Q; N3 A - --# A- r8 }# o) @0 f. w
- INSERT INTO `bg_cate` (`cate_Id`, `cate_ParentId`, `cate_Name`, `cate_Intro`, `cate_Order`, `cate_Icon`) VALUES
, T' v2 j0 n, U% { - (4, 0, '往事如风', '记录往事', 0, 'icons/6.gif'),1 G3 }# @& [, y
- (5, 0, '水煮三国', '品位三国智慧', 0, 'icons/3.gif'),
: a5 J' o. y( G - (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'),. _) J& ^+ L& z9 e
- (3, 0, '生活点滴', '记录生活点滴', 0, 'icons/2.gif'),
# ~% f0 p# k- y" N - (6, 0, '栀子花开', '青春无限', 0, 'icons/8.gif'),& |8 i6 w ]' O$ b: d' O: c) n
- (7, 0, '假日休闲', '悠闲、自在', 0, 'icons/24.gif'),
- e9 X) G5 ?- m% ~7 F& M. h - (8, 2, 'html', 'html学习', 0, 'icons/1.gif'),
8 ~! |. S, [0 h9 V6 x8 ]0 s! B - (9, 2, 'css', 'css学习', 0, 'icons/1.gif'),/ F5 {$ q: ]5 r6 t" c! ~
- (10, 2, 'php', 'php学习', 0, 'icons/18.gif'),
, H0 |- \& V2 A' W# k) E O* R - (11, 10, 'php基础知识', 'php基础知识', 0, 'icons/1.gif'),
/ ~# j n4 _/ i" u( t6 L - (12, 10, 'oop', 'oop', 0, 'icons/1.gif'),- c1 ?, V _! }3 s, O) j/ k9 z6 M
- (13, 10, 'php安全', '讲述php安全', 0, 'icons/1.gif'),
/ h1 z K# v" H1 J- { - (14, 10, 'seagull framework', 'seagull framework', 0, 'icons/1.gif'),
2 S; |9 e# R- i* A - (15, 2, 'javascript', 'javascript学习', 0, 'icons/1.gif'),3 `, b) m, e% ^# d
- (16, 2, '设计模式', NULL, 0, 'icons/1.gif'),% U9 K$ h1 R0 A5 M: E
- (17, 2, '软件工程', '软件工程学习', 0, 'icons/1.gif'),
0 ]5 y+ t/ @: H' W$ O( U - (18, 3, '厦门生活', '厦门生活', 0, 'icons/8.gif'),
5 Q- ?8 J& Y: Q - (19, 3, '大学生活', '大学生活', 0, 'icons/8.gif'),8 B1 v% w$ g+ ` o7 W
- (20, 3, '童年生活', '童年生活', 0, 'icons/15.gif'),0 N+ P" c" w6 p. g: k
- (21, 19, '学习', '学习', 0, 'icons/1.gif'),
% O) y6 M9 {2 `6 q' | - (22, 19, '运动', '运动', 0, 'icons/16.gif'),
3 i T3 [1 k0 ^- [) b - (23, 19, '旅游', '旅游', 0, 'icons/24.gif'),6 E. P" M' r/ X6 U
- (24, 22, '排球', '排球', 0, 'icons/9.gif'),* K2 Z m, k( J& I- ?" C% l8 @* u
- (25, 22, '篮球', '篮球', 0, 'icons/9.gif'),$ J: h1 v0 `8 ~1 M1 L( s
- (26, 22, '羽毛球', '羽毛球', 0, 'icons/9.gif'),
% a1 s* r9 V0 u7 I* R - (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。7 _: I. N% [0 f# n3 X( ?
- require_once './classes/MyDB.php';
( u& w1 t$ i+ q y1 e7 `2 v2 u - $con = MyDB::singleton();
2 T H+ q/ N4 G* V6 K8 K& @. r7 X+ V - $sql = <<<SQL
( `" j/ k1 |1 Y. T2 z7 @ - select * from bg_cate cate
& I, E/ S9 F" t7 h4 z+ z; } - SQL;1 k: v# D Y0 K3 m( W) f, ^
- $data = $con->getAll($sql);* M2 t4 R/ j3 g
- //print_r($data);
复制代码 数据库操作我用的是pear类库。 t- {) s8 I9 I. i5 r
最后的$data的数据格式如下:5 ?" ]) ?0 s" l. ~6 n
- Array: {1 M5 l3 W7 Z2 y; z$ ^
- (
; W6 A9 I. m, ]2 c - [0] => Array: C# O: p/ S5 t% ~7 A8 I' \& r" D
- (+ _ a, M% o! g
- [cate_Id] => 4
. N) n# _: q) a( Z; e - [cate_ParentId] => 0
" h8 G( c# X1 t& n. r- f - [cate_Name] => 往事如风
( W# A9 t' e) B! E. M - [cate_Intro] => 记录往事: [: k# [ [8 s, ~0 p* i: ^
- [cate_Order] => 04 E2 e: [4 p$ A* y8 R0 V, ?* W! d3 r- I4 A
- [cate_Icon] => icons/6.gif
: x" b5 ?) N6 f v; T$ N) u( _- [ - )
% d. I/ Q! L3 J/ h( A( z/ F& h - [1] => Array
" j4 Z' `" K7 S+ n4 Y& {: n5 x - (4 p6 ~/ v1 b$ t3 G+ s# p! N7 i
- [cate_Id] => 52 q; ^: g4 J9 S/ E
- [cate_ParentId] => 02 K, I% H6 o# ^+ Z) H1 |' [5 _
- [cate_Name] => 水煮三国
3 E8 X: R7 j# Z- [$ t) }8 R - [cate_Intro] => 品位三国智慧: F: K3 e6 F; M, i: R
- [cate_Order] => 0. Q( v4 L( X% b* V4 ^
- [cate_Icon] => icons/3.gif1 B4 d) \3 {; K1 K: U2 d/ \1 p1 M
- )
复制代码 三.把上一步的数据转为树型状的数组0 s1 K% u0 N6 {+ Q" \" h
代码如下:: C. ?5 ]. r2 Y. g" Q" V& b( k
- function getTree($data, $pId)+ _+ Y8 v" b+ _3 ~
- {) [" R8 F' F4 P2 x" _: w3 [- t
- $tree = '';
6 w. z( y( k* Z6 I) c - foreach($data as $k => $v)& y/ b8 k$ j1 }9 Z5 }4 E! u
- {2 Y5 z% X4 _. J) ~3 `# s# j0 j
- if($v['cate_ParentId'] == $pId)
* B. n$ g( z( D' S2 W, R9 q - { //父亲找到儿子1 G. ^( T9 k" _% e/ T! o
- $v['cate_ParentId'] = getTree($data, $v['cate_Id']);% y6 {$ Y7 I9 R4 Q
- $tree[] = $v;$ U* ~" p. c2 Q D
- //unset($data[$k]);
& I& E" t8 m; r8 t - }
0 v# ]4 o( F$ u9 V6 O - }
! f" j. |( ]' }! h; C# w0 ? - return $tree;
2 e6 \4 }8 w1 ]! G4 P - }8 n1 Y* Z" T% [6 U; u! ]
- $tree = getTree($data, 0);
复制代码 最后输出$tree的数据格式为:
; m; S% M4 E- S- B7 ^- Array. X" F1 n E5 L
- (6 O* O- _: h+ S. e8 a" Z
- [0] => Array
# s5 z# e4 q6 C0 z9 r+ B - (3 k$ }' R1 C1 E( E5 b2 o3 z
- [cate_Id] => 4. v3 K2 V$ y" f4 g2 w$ C( \
- [cate_ParentId] =>
! y" L; j) Q) B1 z" l6 b& Q% n - [cate_Name] => 往事如风
) p8 N+ c/ U" V& v" K - [cate_Intro] => 记录往事% h$ n# I2 o+ @1 {& ^( F
- [cate_Order] => 00 H0 g: |6 g! Y( k
- [cate_Icon] => icons/6.gif# @. _9 Q e9 o: b4 N5 z, l, D- R" }( O
- )! S! [4 W; m- P% J9 t( T9 E/ o
- [1] => Array% q: _3 m$ C. ^, B) b
- (
8 K8 A: C# Q: j% k3 F3 i$ J9 F - [cate_Id] => 5; u. F0 a" f/ U; O
- [cate_ParentId] =>8 { K/ P; k% ]& C1 p
- [cate_Name] => 水煮三国0 Y P V0 ~7 |4 C2 [1 W D
- [cate_Intro] => 品位三国智慧- d4 C4 j2 e5 ^( i E: Y6 y4 h2 J
- [cate_Order] => 04 g" i" C# Y( r5 n3 \ J
- [cate_Icon] => icons/3.gif8 _" r" ^# j5 M: F
- )
6 w" t2 O6 z2 E ~7 H - [2] => Array- g. v) j1 e C" z# P
- (
% Y M+ l% z& y9 _: n* _ - [cate_Id] => 2
# B' n$ X. A% [' v - [cate_ParentId] => Array
+ U _/ G: O3 E3 w1 z4 @1 [ - (
2 X! p( p2 p8 X! @" A - [0] => Array
; U4 z6 l/ \" N% O4 N - (
$ g. k' [4 k7 L0 o! A - [cate_Id] => 8
1 K. c2 X. _6 W- S9 a4 ?5 E - [cate_ParentId] =>$ `, n, [! e, B6 `
- [cate_Name] => html
4 B+ k5 s- \* R1 U/ U6 Z - [cate_Intro] => html学习
1 v, d- {3 n9 g. f! \4 ]: T( ^" M, N - [cate_Order] => 0+ H: z. T. _ O. J& {. y* Z
- [cate_Icon] => icons/1.gif& s1 z, y. r/ R* A% s0 m- t
- )
复制代码 四.把树型状数组转为html
3 _: N. j" L1 R% K代码如下:
# l# S# C% ?2 Y" v0 f- function procHtml($tree)
x! Y' j$ q. t1 ~2 \ - {
9 Z- P6 M( |, v- _ - $html = '';* P9 H* @+ G( C
- foreach($tree as $t)
+ V q" c7 N! i X# {( Z; r0 n - {. j8 Z) i0 b- C- U+ q" S1 D" Q1 [
- if($t['cate_ParentId'] == '')
$ G, e( v/ e# O( E - {$ X; C% K0 _9 w$ {* Q, s
- $html .= "<li>{$t['cate_Name']}</li>";5 g _# R$ |& Z0 o
- }0 S1 t/ ] d/ X) p2 y- H1 f+ @1 l# h- u( p
- else; L, z; L' g! I }+ {8 r
- {2 V0 n8 |, a3 ^* j* c/ v2 O B
- $html .= "<li>".$t['cate_Name'];* B5 g, C/ ^4 ~9 z0 x/ T- u
- $html .= procHtml($t['cate_ParentId']);
) h. P# K* U5 X" `# Z8 R1 M8 N - $html = $html."</li>";( d* i1 L8 {: u
- }
' f( v2 ?6 B7 L' F/ _ - }
% M# N0 v6 w( V9 G1 z0 Z - return $html ? '<ul>'.$html.'</ul>' : $html ;' W1 ~3 [- o% |: d
- }
3 U( N6 @, Y. g e' [ e - echo procHtml($tree);
复制代码 输出的html的代码格式为:
2 c5 c. _+ M9 M/ n5 [ X- <ul>
, Y2 \2 s) h- K) E - <li>往事如风</li>5 e$ u. c% t2 X( W- L
- <li>水煮三国</li>6 i) z- c# c6 M. z; I
- <li>技术学习
* P+ B: i1 B9 l* ~$ }: c$ h1 ~) C - <ul>
. w; d6 I& e3 {" N9 `6 x - <li>html</li>: i6 _/ t4 I4 i: r8 R( N
- <li>css</li>2 r$ s: n* ^, o# U
- <li>php
) M4 D( F# M6 q! | - <ul>! r+ l+ a" m& m
- <li>php基础知识</li>
$ w6 s7 _$ x9 j# o3 ~+ U/ w8 V' N( ] - <li>oop</li>
4 D8 j" p* ?+ \& [ - <li>php安全</li>
复制代码 五.代码整合
$ R7 @% d* L5 H7 \- function getTree($data, $pId)" p3 h( {! j4 p; f
- {
: ^; L. B4 N0 m4 K - $html = '';
7 O: A' U( y8 u( T" s( I; S0 y - foreach($data as $k => $v)& K" _' P6 P3 t0 s, K4 Z
- {% R; w/ u# p$ [; g: {0 u
- if($v['cate_ParentId'] == $pId)" o* i' M" w$ V8 K8 u( y4 \
- { //父亲找到儿子
9 M! n5 u1 u- q9 p. a - $html .= "<li>".$v['cate_Name'];
b# Q! R9 K) S7 O% P - $html .= getTree($data, $v['cate_Id']);
. i( h$ d# }7 u4 m - $html = $html."</li>";
8 W* Y1 q& s# D" J5 Q4 C) [! s/ j - }# h# K1 Z5 g0 E, e5 t) z
- }" q1 p- B) D: ^% g& e
- return $html ? '<ul>'.$html.'</ul>' : $html ;) B. d7 D) S- H+ S4 l
- }
9 m0 f) C4 G( M7 H! j8 y - echo getTree($data, 0);
复制代码 六.增加CSS样式0 w% ?( _! G# X% f: g
$ y3 K3 K X; S; x: a( T, F
4 s5 d! W5 i$ w0 F6 r: T/ Y5 Z
第二种是从开源网站上看到的,非常非常的简介。+ {9 y1 J+ E m
- <?php
; p. k3 v% }/ ] - $ v0 U7 a" \: B/ l
- function genTree5($items) { 2 y9 L" r$ x j; b
- foreach ($items as $item)
/ w2 K' t9 |+ H. Y - $items[$item['pid']]['son'][$item['id']] = &$items[$item['id']]; 9 f4 x' p4 a7 x* d) h6 ]
- return isset($items[0]['son']) ? $items[0]['son'] : array();
5 ~" `9 c8 K: u- k - } 4 M7 v h4 m+ O E) H! C
-
5 y4 B3 x" s2 C! u( r1 f& O* m - /**
9 @( ?5 |, H6 i8 C" M - * 将数据格式化成树形结构
6 p- ~: ]& E3 w) A! z+ D: O - * @author Xuefen.Tong
4 {1 P' p( f) e2 x, o - * @param array $items
# T5 X$ Y% o0 A- } - * @return array , s# N% g$ f W: f
- */, x+ y( |2 ~1 ^1 W9 `
- function genTree9($items) {7 z( ]& }- L6 G% j& E2 d4 z
- $tree = array(); //格式化好的树 h' }4 M' S: {3 r5 T
- foreach ($items as $item)0 F& f5 e1 @" s
- if (isset($items[$item['pid']]))1 Q: X' A; c/ ^4 M- h' m/ k8 \! Y" ]
- $items[$item['pid']]['son'][] = &$items[$item['id']];
O7 u* F1 X$ x( b8 _! M" ^: X - else
! X- [( _$ {$ e% i8 P& O0 |' H( w - $tree[] = &$items[$item['id']];
& h4 [; k' r- G& {( T - return $tree;+ h) B* ] E4 }/ H
- }
8 I' Z' u. X0 C7 I& e9 O0 q$ s# ` -
1 U+ C( X# @8 L& A9 F - $items = array(7 _2 N' L9 }( u8 i0 H$ r. b$ @
- 1 => array('id' => 1, 'pid' => 0, 'name' => '江西省'),
6 M" X: O% ?* p% \* o - 2 => array('id' => 2, 'pid' => 0, 'name' => '黑龙江省'),
% N5 p3 j4 @" n2 d. a - 3 => array('id' => 3, 'pid' => 1, 'name' => '南昌市'),
+ k4 r$ ?1 h2 V - 4 => array('id' => 4, 'pid' => 2, 'name' => '哈尔滨市'),
* r$ n5 P, I1 M7 s5 m$ X. q - 5 => array('id' => 5, 'pid' => 2, 'name' => '鸡西市'),# r% T$ C- ]. v% Y( @) n8 z) H2 s$ W
- 6 => array('id' => 6, 'pid' => 4, 'name' => '香坊区'),
' f" I {, O" K$ _8 h- S1 E - 7 => array('id' => 7, 'pid' => 4, 'name' => '南岗区'),
2 v; f+ n, e# [& J& S0 C - 8 => array('id' => 8, 'pid' => 6, 'name' => '和兴路'),. V; \. y. W( f
- 9 => array('id' => 9, 'pid' => 7, 'name' => '西大直街'),
g# E g* I. Q/ m) S6 n+ b+ ? - 10 => array('id' => 10, 'pid' => 8, 'name' => '东北林业大学'),! ?) J5 a! D& n- |8 A; a3 v- ~3 n
- 11 => array('id' => 11, 'pid' => 9, 'name' => '哈尔滨工业大学'),
! F! t" J3 L7 I% d3 z% h - 12 => array('id' => 12, 'pid' => 8, 'name' => '哈尔滨师范大学'),
0 C: T. P2 W& y5 S K# u - 13 => array('id' => 13, 'pid' => 1, 'name' => '赣州市'), d7 }$ f/ k/ L% u u
- 14 => array('id' => 14, 'pid' => 13, 'name' => '赣县'),4 }" L$ b; G: {! I, J7 \" j4 {) h7 p7 \
- 15 => array('id' => 15, 'pid' => 13, 'name' => '于都县'),
. q8 p# Q& A' x: o8 u6 l- E- L9 y! L - 16 => array('id' => 16, 'pid' => 14, 'name' => '茅店镇'),
& I+ v: Y! r6 o5 w - 17 => array('id' => 17, 'pid' => 14, 'name' => '大田乡'),
( [: H, x3 L+ w: y' x) A - 18 => array('id' => 18, 'pid' => 16, 'name' => '义源村'),
1 \$ w+ m+ c/ @9 [ - 19 => array('id' => 19, 'pid' => 16, 'name' => '上坝村'),
6 ~2 E( W+ L, _4 j - );
" P' n% Y' H8 u0 [6 \ - echo "<pre>";
3 Y* ]5 G, S- ` - print_r(genTree5($items));
* m) u b6 i6 f2 r; }2 k( s/ g! k - print_r(genTree9($items));$ b0 V0 Y& ?; x- d# l! L9 U
- " o2 U0 { r- V+ I: 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+ Z4 p' n& M! S4 T: b. B* q9 z
- /*
0 T3 d4 G" S" ?( ~4 W" A! @ - Array& {. n7 H& a' Q- [$ Q
- ( d1 ?) y* \6 s% ^5 y
- [0] => Array
: n& T0 d7 G1 }" n- M! O3 i Y - (
1 f; t/ P- K* |+ R2 e% A% v - [id] => 1+ Z% u4 z: Q/ I3 ?
- [pid] => 06 o4 U$ g+ w* o1 k5 S9 b0 Z
- [name] => 江西省' B( t3 T2 s' B& P8 \5 _; n
- [son] => Array% l# M6 @2 d& g: T0 F2 O$ \# v- x
- (
$ _- d5 w* @7 X$ Q# W! L - [0] => Array5 C" p( \9 ]! ^# ?& O1 Q
- (
$ \/ z7 A3 c5 ~" q0 Y1 t e - [id] => 3$ a# n6 I: m$ G7 ^, i. `8 Y
- [pid] => 1
" E4 [: j" R# D/ S9 f - [name] => 南昌市6 @0 h1 @+ }- P& |) `/ X" b
- ): c, e% L0 M& f2 V$ b1 f0 @
- 6 }; q7 b/ N% R! B/ K4 i
- [1] => Array
5 o5 w: _9 I8 V2 q6 n5 f - (
, E" ~! |( f+ p/ S# E! ] G - [id] => 13
& B8 J7 D% z/ U( a9 G1 g, a - [pid] => 19 g, q o4 \1 o
- [name] => 赣州市
; Q' o4 }: u/ A$ r2 T+ @9 l - [son] => Array9 f% ]9 B, v! }& H% w
- (7 l0 G5 @: P0 y H) c+ j# V" v
- [0] => Array" i; T, U8 B" b, c( [# c% u- |
- (
7 C+ l- Z* G2 @7 E+ R# _$ t: t - [id] => 141 I8 H- S6 c" e5 v3 g( a2 F) T
- [pid] => 133 Z" u- A1 k* _- f3 \
- [name] => 赣县: @" N) ?0 r2 n* p) H
- [son] => Array5 _; z- r5 B) R
- (4 r- w& S4 u2 q1 W3 O/ L0 n
- [0] => Array2 ^4 E- ^( x/ ~5 n M
- (- @/ g$ h3 v" R; J f8 D: O; H
- [id] => 165 e$ Z; ?3 B: K/ L
- [pid] => 14% z v% l; L: Q' N0 p
- [name] => 茅店镇: d5 b# m/ J |7 M; `5 Y' F# j( b
- [son] => Array
5 o( ^& l/ A0 a( ]9 _ - (
4 [1 R7 p6 n% Y6 S/ Q - [0] => Array1 z4 b3 P% N7 \2 V/ f9 j5 P
- (
r) ]4 B/ p, \+ m" t. { - [id] => 18* ?5 a' B6 p1 f* |
- [pid] => 162 P7 [! m; [6 {3 _
- [name] => 义源村) d+ |4 a, T. s: P# B
- )
5 {. t) F1 t2 D. W6 C -
/ L8 s( A1 X- ^' O ~ - [1] => Array
* l, B, A) T' f( Q- |, ^ - (
5 T# ~9 f& T' ]; q! _2 I7 w# I - [id] => 19
) Q% \8 j5 F/ j: D4 T# H6 e - [pid] => 16
4 F! _; y6 x3 H4 N" f - [name] => 上坝村' ^: K$ R- Z3 V d0 I
- )4 f+ P# k, n/ p! K! m: K
-
: N+ F) ^% R; U; l1 }" R - )) w4 J! V3 Y- g. H/ I
- 1 V' {/ N x2 U- v
- )) [- i, ]! H4 J* o+ a
-
# L& J" |! a% _# Y- U - [1] => Array: P9 R- o8 M# u, N- O; d% s4 V5 k
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- [id] => 17
3 S5 @. F% F8 F3 F9 M8 Z - [pid] => 14
k$ b" ^3 P; L, { - [name] => 大田乡- }, T* Q2 E: w+ |2 _3 K
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W Q2 `. l& U - [pid] => 13
% |8 p' o7 N x9 j0 y, v- h1 N - [name] => 于都县; M8 T7 c+ Z# b9 O& ]
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1 q2 p v8 {4 c" I0 ~4 E2 Z) q - [id] => 2
( v: _8 r4 ]7 Y# L i - [pid] => 0
/ m" g- G9 `3 Z4 [" u - [name] => 黑龙江省
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- [0] => Array- D# Q/ n; p0 _3 |
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- [id] => 4
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% L+ b1 V- v5 |6 j" f; F - [name] => 哈尔滨市
3 Q& z3 T. H* V5 a1 c) h - [son] => Array8 W$ H! C$ \9 e3 h
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- [0] => Array: W$ { X2 X3 j$ {# I4 B& ^
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. U/ B9 \. Z; o0 y) }) r3 T - [name] => 香坊区
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- [pid] => 6
( n: ]; n1 x" O5 @. {- t - [name] => 和兴路: f! }. U9 H. E0 e
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- [id] => 10
5 t, u3 E: c: { - [pid] => 8
+ R! A7 d( T. N8 _: I2 q2 E0 b - [name] => . [! E6 P- y4 G
- 东北林业大学. p( \- J* P8 a) a# H) }" j
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- [id] => 12% Y7 S, l2 ?+ E M+ q
- [pid] => 8) v; C( l+ e7 {: f6 k. M" W4 L& F
- [name] => - } {2 \# P3 L* j- q$ W9 F) w
- 哈尔滨师范大学( f. N: `; [, ^# x3 W# c
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- [id] => 7
! r9 A8 J* Y0 R* W$ V - [pid] => 4
0 p3 p0 x5 t4 F) j; l - [name] => 南岗区
! i/ I+ S; l, Q3 X, k8 h8 E - [son] => Array4 N2 ]2 u1 F2 k, [) L
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; i/ A. x4 r8 k2 z9 ]% } - [id] => 94 u) c1 ^% O8 V# G
- [pid] => 7
& z6 B1 b# q5 M. c - [name] => 西大直街( V% t/ k( R( e: L
- [son] => Array
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3 d# O9 q8 d6 U" W& l4 ~- [. Z - (
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) n, B1 n0 P5 o) D - [pid] => 95 f: s6 f. Y% |3 ^/ z p+ I. Y
- [name] =>
! W1 f$ y8 L4 z* } - 哈尔滨工业大学
1 T* [3 X/ |( N- j2 k - )
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: R" i4 L3 e) s0 z - [pid] => 2
1 G$ G* @! Q/ @: S1 \) ] - [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。& V2 m+ f2 a# R, c
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