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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。
) H5 v: j2 o) T6 a, k一.数据库设计
! Z& \1 W7 W9 ]6 O. |* T) I- CREATE TABLE `bg_cate` (9 u% x% P. z, o
- `cate_Id` int(30) unsigned NOT NULL AUTO_INCREMENT,
+ N! X( M9 h w/ E p - `cate_ParentId` int(30) unsigned DEFAULT '0',( w# G6 Y$ F# Z3 M' S
- `cate_Name` varchar(100) NOT NULL,
, U3 w; \8 b1 w" y0 C) L2 }* F, v - `cate_Intro` varchar(500) DEFAULT NULL,
1 m, U* I u" X( x! f2 T2 G; a - `cate_Order` int(30) unsigned DEFAULT '0',( I# ~, z, O$ a
- `cate_Icon` varchar(100) DEFAULT NULL,
6 Z0 [7 D( P( p O# O - PRIMARY KEY (`cate_Id`)
+ T! Z0 l( z$ ~9 Q) { - ) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=34 ;) H. O& w7 W3 ^
- --
5 L+ S9 u3 Z! J1 z - -- 导出表中的数据 `bg_cate`8 h! N, R* P# t% F9 V" x
- --
3 k) C R" b5 R- _4 B - INSERT INTO `bg_cate` (`cate_Id`, `cate_ParentId`, `cate_Name`, `cate_Intro`, `cate_Order`, `cate_Icon`) VALUES- ~2 l; U7 C' y* ~5 ?* o
- (4, 0, '往事如风', '记录往事', 0, 'icons/6.gif'),
0 V6 a1 ?8 P) _6 k - (5, 0, '水煮三国', '品位三国智慧', 0, 'icons/3.gif'),0 `0 D; [7 W" g5 I: k' X
- (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'),. S( ]' Y& E, x- m) q, e' m
- (3, 0, '生活点滴', '记录生活点滴', 0, 'icons/2.gif'),
* N. B* Z8 B% ?# T0 r - (6, 0, '栀子花开', '青春无限', 0, 'icons/8.gif'),
$ H& ?% h, w- j$ u$ H - (7, 0, '假日休闲', '悠闲、自在', 0, 'icons/24.gif'),, F- o9 w: X# P
- (8, 2, 'html', 'html学习', 0, 'icons/1.gif')," f2 ]/ y$ m. c8 X" \2 J& J4 q: C
- (9, 2, 'css', 'css学习', 0, 'icons/1.gif'),7 |1 e. K8 m* K7 C" g
- (10, 2, 'php', 'php学习', 0, 'icons/18.gif'),7 f( q6 j6 y W+ C8 v4 m5 r1 T
- (11, 10, 'php基础知识', 'php基础知识', 0, 'icons/1.gif'),& J P8 O! D! T4 q; T. z/ f9 Q4 `
- (12, 10, 'oop', 'oop', 0, 'icons/1.gif'),$ K; i) ]! K% u' U8 r! y
- (13, 10, 'php安全', '讲述php安全', 0, 'icons/1.gif'),) R5 P f7 _) z; G6 B z f
- (14, 10, 'seagull framework', 'seagull framework', 0, 'icons/1.gif'),
9 J( E: y3 Z+ b, }1 x! C - (15, 2, 'javascript', 'javascript学习', 0, 'icons/1.gif'),
/ q$ C3 J r* K0 \4 V! W - (16, 2, '设计模式', NULL, 0, 'icons/1.gif'),7 Y) K- u. `3 D$ a6 s6 x! z. h
- (17, 2, '软件工程', '软件工程学习', 0, 'icons/1.gif'),
; G1 F! Z: n# G& B3 A$ X - (18, 3, '厦门生活', '厦门生活', 0, 'icons/8.gif'),
1 c3 u K. W! }6 C8 _/ M1 h - (19, 3, '大学生活', '大学生活', 0, 'icons/8.gif'),; F P% X/ c) Q# ?. v2 G
- (20, 3, '童年生活', '童年生活', 0, 'icons/15.gif'),' ^- m% F7 S% A! k
- (21, 19, '学习', '学习', 0, 'icons/1.gif'),' c. g- f5 j! C+ y2 ~8 z
- (22, 19, '运动', '运动', 0, 'icons/16.gif'),3 F' j* T% E; P. Q5 J
- (23, 19, '旅游', '旅游', 0, 'icons/24.gif'),4 @0 K1 s9 C- b. |4 ^3 {, z
- (24, 22, '排球', '排球', 0, 'icons/9.gif'),
, u* s( M5 j- H$ U0 F) Y - (25, 22, '篮球', '篮球', 0, 'icons/9.gif'),: {' h) b9 z. X _) y
- (26, 22, '羽毛球', '羽毛球', 0, 'icons/9.gif'),4 f2 Y( `: 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。) [9 g6 ?' I/ U6 x( d' O
- require_once './classes/MyDB.php';
/ q3 i# \) ~* c# b* x H - $con = MyDB::singleton();. J. h) H& K1 t9 H, u! N' u- O7 } t
- $sql = <<<SQL' j; t& j ?3 p# u. M
- select * from bg_cate cate/ g4 ]8 {1 K" X6 j+ q! W
- SQL;
& ?# ]7 H, s8 r( ?/ _ - $data = $con->getAll($sql);
4 s; g$ B. W1 d' s! X/ k; L - //print_r($data);
复制代码 数据库操作我用的是pear类库。6 c6 N( U. s- v4 r
最后的$data的数据格式如下:: z- L- L* a* a
- Array
1 D, M. S- L( |3 N# A6 f5 P' G9 f+ f - (
3 l+ o' X4 w G- g: H - [0] => Array: ?6 P& n2 {0 u. A" D8 Y' j
- (
4 m" I% g9 P/ |& K4 ? e - [cate_Id] => 4
' q8 [. N0 g( P) V9 t$ C - [cate_ParentId] => 0
x+ b/ u% ^0 q, Z - [cate_Name] => 往事如风
2 f/ K$ X% k7 {" m. i7 R - [cate_Intro] => 记录往事" T6 ^0 s" [$ K4 a9 w' I
- [cate_Order] => 01 P8 A1 Y2 L# D# d2 i2 S$ p
- [cate_Icon] => icons/6.gif
+ B# b: X8 q" j. Z/ ?. v6 N8 H - )
* @4 e6 K' F1 y0 }( O% _+ ]9 j - [1] => Array% J% A4 E- Y1 p: l/ b
- (
& I# L7 s$ ]9 X$ H1 }( ] - [cate_Id] => 5
% t1 y5 k) ~8 a/ i! k3 b - [cate_ParentId] => 0
8 }- R& K; u: n/ U3 \ - [cate_Name] => 水煮三国! l0 z/ E4 H) B" v
- [cate_Intro] => 品位三国智慧
) G% s$ k# y$ k/ v( _& c+ E3 J - [cate_Order] => 0
9 } \3 M3 [9 J# u5 ~ - [cate_Icon] => icons/3.gif8 G5 o$ k( S, f: V
- )
复制代码 三.把上一步的数据转为树型状的数组
( I1 t( N1 X% d8 W% x2 h7 N# |代码如下:
. `8 z* k1 d" w+ K# h" y- function getTree($data, $pId)
: M7 F. b0 U% X& z - {
9 S7 H- \. J" k2 f( w8 o - $tree = '';! e2 L' I9 l4 M! L7 y
- foreach($data as $k => $v)
: ?' m6 V: G' V2 u - {# S5 n9 T7 R) b7 e' B
- if($v['cate_ParentId'] == $pId)
3 Q! A1 O& |+ g# Q2 m - { //父亲找到儿子 R, t! U8 d7 X: x" j
- $v['cate_ParentId'] = getTree($data, $v['cate_Id']);) y0 D/ ^, t7 u; ?( \8 m
- $tree[] = $v;
( p9 S" ]( ^7 b, X0 s8 m; J - //unset($data[$k]);% r. t9 J7 \. I3 t" d$ y; F' A
- }
' g, d* v/ B: I' _ - }" `7 Q- I, @1 J; ^
- return $tree;
& ?' Z0 C& n2 @6 |: j2 _, M# L/ g/ w - }9 J: b: o, k9 E. R% w2 p& Z
- $tree = getTree($data, 0);
复制代码 最后输出$tree的数据格式为:- N) p K8 O) Z6 E! R
- Array4 ~7 ^$ v% S6 ~ T6 D* `+ r2 Q7 m
- (
8 V* @! O& v& z2 `$ u - [0] => Array# G2 A/ N/ F- U7 O, _. _7 |
- (% }5 H6 R1 N2 G5 y
- [cate_Id] => 4
. a& }4 v; V# Q0 f4 q2 ~$ l - [cate_ParentId] =>! O3 W* d: v/ w1 u# C
- [cate_Name] => 往事如风
D0 i- V, s0 S1 G3 o$ y" u4 E - [cate_Intro] => 记录往事
) w- I9 U' s( v# p6 B, a: L1 i: D9 f - [cate_Order] => 04 {% h6 u3 m4 M' S
- [cate_Icon] => icons/6.gif0 Y" p( }+ D+ G" N- V4 |
- )
+ w& }7 g3 @9 `; i2 ~ - [1] => Array
6 e; K' ^ B0 w( S" x$ A0 J0 P - (" I/ ]: t* Z& D9 B( Q9 s1 I. N: R* `: n
- [cate_Id] => 5
$ m% A6 ?# C2 j* `/ [ - [cate_ParentId] =>
4 R9 @, A4 M0 K$ J2 F - [cate_Name] => 水煮三国
7 S& V3 G/ j8 \5 A9 x0 V3 y - [cate_Intro] => 品位三国智慧
5 ]; v: t" q6 y3 `$ I" k1 v$ j - [cate_Order] => 0" _2 V2 U' e0 ~ D/ p
- [cate_Icon] => icons/3.gif
3 f7 D! o- }" _% }- g: N - )
& Z' A3 j6 I" K6 [: F* L2 Y3 l - [2] => Array6 W3 y" I- x5 O4 k5 [5 z
- (' l1 @ y0 v: O& ~ | {
- [cate_Id] => 2
' H+ q+ q O" ~' F. |8 b3 N - [cate_ParentId] => Array9 C" {1 F7 n) |8 G5 I g3 B$ F
- (
+ u+ _! K8 B% Y* B& M - [0] => Array- \0 @ U% n% H! ]# o
- (
8 m0 `# u) I6 Q2 M# Y" g - [cate_Id] => 8
8 H7 w7 t9 B0 D - [cate_ParentId] =>
" b+ M5 P& _: Q- I( e - [cate_Name] => html
" _+ B# ^8 D5 [6 y" |* ^7 G( K! j. X - [cate_Intro] => html学习7 j0 h" \- n! I6 [: e6 ?
- [cate_Order] => 0! b, @3 I7 L- c$ h9 B6 h
- [cate_Icon] => icons/1.gif
# K; q0 T& }. K& H - )
复制代码 四.把树型状数组转为html! \5 l3 Q% d) i: S
代码如下:
$ P' p, w3 S j$ r8 ]% @- function procHtml($tree)
1 H" w4 `/ y) m+ w% k- S8 q0 H - {
6 R* s Z* R5 \( g8 a5 I - $html = '';9 u; _+ _) V) c7 ]
- foreach($tree as $t)0 T w' ?/ f& E" w) O7 p
- {; _9 x8 x2 Z3 c* \+ H F: k6 S9 _
- if($t['cate_ParentId'] == '')
z) H. l* h6 U+ y' x2 ~. U - {
T% L* Y+ ]; e - $html .= "<li>{$t['cate_Name']}</li>";
2 e" C& R# @; l# m- k2 e! q - }
1 ?1 U0 i x7 V- S; E - else
8 v" |) X2 g- R7 R1 f4 W: \$ a+ x - {( {$ f/ z5 r w7 w# b5 N
- $html .= "<li>".$t['cate_Name'];6 }4 K& \. l( d3 h/ R& p1 ~
- $html .= procHtml($t['cate_ParentId']);: b/ f6 w# [8 m9 z
- $html = $html."</li>";
" {+ X8 D7 y, F. V1 S - }9 K) R* L% ^9 X7 t* ~- `
- }
! R, X' r. ?( J( b" {; W: Z6 w - return $html ? '<ul>'.$html.'</ul>' : $html ;/ Z/ v3 R1 h7 Z4 o
- }2 I2 n" |+ b, l9 P1 |" h
- echo procHtml($tree);
复制代码 输出的html的代码格式为:5 f# T8 h, n$ \
- <ul>4 c0 \8 K; L1 G2 F
- <li>往事如风</li>
! x" ?+ B, I; T1 M) f* } - <li>水煮三国</li>
) J w5 H$ Q& a1 y# z t$ ] - <li>技术学习
' b3 M# n2 D5 ~6 ^/ l1 u - <ul>
9 l+ l6 l- H/ n$ l1 ^# t+ L - <li>html</li>3 X Q0 g' Q' S- j
- <li>css</li>
( @0 K- l) Y7 v0 O - <li>php
, N4 H3 f/ p/ _ - <ul>
8 d9 S& X/ ?1 {% ` - <li>php基础知识</li>
! G0 E. Z7 m! x0 n9 e - <li>oop</li>
% f6 F5 _9 D' b$ f - <li>php安全</li>
复制代码 五.代码整合6 d7 a$ s* C2 e
- function getTree($data, $pId)
; y! T* t1 N% J$ E - {+ c+ C U! a6 C) l0 ?8 h ~6 k4 A
- $html = '';$ G, K9 ?! a0 P T: E1 o
- foreach($data as $k => $v)8 y" i" @6 E+ m9 m
- {
a, x: O$ C& s - if($v['cate_ParentId'] == $pId)" D J0 \2 j Y) G3 Y& O
- { //父亲找到儿子4 N7 q( J& J. G
- $html .= "<li>".$v['cate_Name'];7 r4 v0 P" w9 x1 j( f
- $html .= getTree($data, $v['cate_Id']);& G8 d% h1 V8 ~) _/ b9 s8 w
- $html = $html."</li>";
+ Y9 ?2 z- t* g+ }2 r" [ M- v7 P( X! V - }7 ^7 Z$ B3 _) X" O, d9 }( X+ S
- }
+ R# P6 }' _. H: n+ G1 e$ ?5 w - return $html ? '<ul>'.$html.'</ul>' : $html ;" U. z& I) T4 k7 b1 _0 k2 x
- }
+ f8 z& X) \* j! P+ ]0 i' y% j1 |1 e - echo getTree($data, 0);
复制代码 六.增加CSS样式' E6 k* q& C) Q9 t4 [5 T6 z
W4 i% u1 Q0 K0 ^
* S. X; k9 R/ ^* I6 f0 f
第二种是从开源网站上看到的,非常非常的简介。
! {0 v: D) Q% s/ Q* ]3 N- <?php
/ w- \* F/ ^/ N0 b" u$ r - 6 Y3 K4 C! v- y: e* I2 K- X. V0 o
- function genTree5($items) {
; o9 `7 ^* T6 ?" A - foreach ($items as $item) $ r9 M; P* A! ]6 ~, Z; Q
- $items[$item['pid']]['son'][$item['id']] = &$items[$item['id']]; , [. X6 m" b1 m9 [
- return isset($items[0]['son']) ? $items[0]['son'] : array();
) M0 R: e0 f. f2 \ h1 E - } 2 U) V6 [9 W& ^
-
5 U2 B1 f- Q* I& o - /**
/ j& P" V$ S8 p& I# ]6 @/ ~% B - * 将数据格式化成树形结构
! u& I# _! P. b& Y; D - * @author Xuefen.Tong
/ }4 |; [5 k7 I% b - * @param array $items8 u* V' D9 C4 U
- * @return array
1 D0 g- A3 L! }9 i' ]5 ] { - */
4 a( k) O- Q: k, ] - function genTree9($items) {; w; [$ s0 B; }$ ?3 b) p
- $tree = array(); //格式化好的树0 [4 F" i4 I0 u O
- foreach ($items as $item)' j3 H+ R* F" g( W& C) p5 F/ M
- if (isset($items[$item['pid']]))
! Q2 N( L. {& s4 @ - $items[$item['pid']]['son'][] = &$items[$item['id']];
5 N5 n; I1 a6 G - else1 O/ R2 g. d# d+ p
- $tree[] = &$items[$item['id']];
$ z) e9 I7 j4 z8 n) r, \ - return $tree;
" g2 W% X/ Z6 i0 M- ?. L - }
& A- u P# ^$ Q( T; ^( N! H5 X - ! U0 i4 @: k. Z1 l$ t4 ^" [
- $items = array(4 [6 U) a4 J' s& ~" i- E
- 1 => array('id' => 1, 'pid' => 0, 'name' => '江西省'),
, T+ F$ C/ f' R& G2 n4 U( w - 2 => array('id' => 2, 'pid' => 0, 'name' => '黑龙江省'),. s% f4 x% m- k2 j# N7 f- W& y" ?
- 3 => array('id' => 3, 'pid' => 1, 'name' => '南昌市'),+ U6 r' g8 g/ ?/ s; S4 u4 l' w1 G
- 4 => array('id' => 4, 'pid' => 2, 'name' => '哈尔滨市'),7 l3 j' p$ J Z0 y# `$ F4 V
- 5 => array('id' => 5, 'pid' => 2, 'name' => '鸡西市'),
( q3 E% r7 e) S+ S7 Q: s# j - 6 => array('id' => 6, 'pid' => 4, 'name' => '香坊区'),- l3 r' O* x, g8 y
- 7 => array('id' => 7, 'pid' => 4, 'name' => '南岗区'),2 g, R) |* q# B: t; k: u4 P
- 8 => array('id' => 8, 'pid' => 6, 'name' => '和兴路'),8 E6 l% w. c3 B, m. k
- 9 => array('id' => 9, 'pid' => 7, 'name' => '西大直街'),
) z( ?% A8 i% h5 k - 10 => array('id' => 10, 'pid' => 8, 'name' => '东北林业大学'),4 o D7 l# H6 s0 x
- 11 => array('id' => 11, 'pid' => 9, 'name' => '哈尔滨工业大学'),
1 Y; d7 j" p6 D M - 12 => array('id' => 12, 'pid' => 8, 'name' => '哈尔滨师范大学'),
5 o: {2 K! J+ k# Q$ C - 13 => array('id' => 13, 'pid' => 1, 'name' => '赣州市'),* ?# n2 A& m$ B- _; Y
- 14 => array('id' => 14, 'pid' => 13, 'name' => '赣县'),
$ J# p% O3 {: Q, N$ @- B - 15 => array('id' => 15, 'pid' => 13, 'name' => '于都县'),0 q2 M: u* V; G+ a' z# C
- 16 => array('id' => 16, 'pid' => 14, 'name' => '茅店镇'),
7 ?8 S2 W' m e' f! ~ - 17 => array('id' => 17, 'pid' => 14, 'name' => '大田乡'),
$ S0 s) ? R/ a3 q" _- } - 18 => array('id' => 18, 'pid' => 16, 'name' => '义源村'),- O7 ]7 k+ Y% d0 _
- 19 => array('id' => 19, 'pid' => 16, 'name' => '上坝村'),
% h$ W" @3 S n. z' z5 h, o* S) _; h3 N - );
2 L% ~+ ~: p& x& ~2 Y - echo "<pre>";7 y9 W& U3 _. {
- print_r(genTree5($items));8 D1 P3 j7 C# c+ ]) y1 S, _
- print_r(genTree9($items));0 _! W( n( }' h; J; b, v3 E7 I
-
& I: T2 \4 |+ Q- d3 `) 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
: E8 c$ r- ~! v8 S* D - /*
/ N2 l# i) U; s, ]- F5 j$ q$ x/ r9 { - Array/ P8 g/ v1 Q, ^ y8 M, X7 C( x
- (. J" n( k. U- Q$ f$ K
- [0] => Array
% m) ~7 c0 ~7 R x } - (
f' ?* W) R4 C8 Y( T' X, o - [id] => 1* U/ H4 T) h2 N$ t3 Q
- [pid] => 0
1 f, A; o% n( w& w' T e8 Z - [name] => 江西省
: ~8 V$ c7 D+ L. C1 { - [son] => Array6 S# S! X9 i9 M9 c7 X
- (. N2 W9 y) u$ R+ e% i* `5 Y
- [0] => Array
- g# T. |1 v, D - (# O6 e; R; o# r3 G/ M. `
- [id] => 3
. K' y/ J) Y, _1 ~, R - [pid] => 1. `6 r7 h( W" q+ p
- [name] => 南昌市
o' O0 h7 R. z' O - )
g; \( H/ Y o* _9 P: Y2 ] - - ~- {$ C3 g- n
- [1] => Array) Q4 j6 |6 X5 q+ p" ^$ G) w+ J; T
- (
: P' ~$ f8 o( o) ` X: W0 r - [id] => 13
0 R, f! L# G' i- A) z2 t - [pid] => 1* i m, s' e) z! ]$ N: j* a3 X7 u5 R
- [name] => 赣州市
5 K0 x7 ?- h* o- _6 u" s2 b: P9 {& ` - [son] => Array, \2 e/ g( \1 R' x
- (
2 C. f ?/ t5 r0 ?9 `& P) ^; ^7 t - [0] => Array
* s$ @/ g# d4 O) u6 e - (
0 I: Q5 u5 e0 `! G - [id] => 14
+ L( ]; A' K8 }7 [% J - [pid] => 13
2 E/ x; H5 o/ Q) l' {2 @ - [name] => 赣县4 S3 ]+ C/ B& A
- [son] => Array
" n5 _$ v8 T+ E5 ] - (
8 l5 O* ~! O& b, v( R' J9 P7 N - [0] => Array6 v8 p& T) ~8 |! X# J
- (
( }$ b Q: R q+ X& A8 Y - [id] => 16
$ x0 V' x1 M# B0 X0 e - [pid] => 14
% A0 y4 Y* N2 F) [ - [name] => 茅店镇
1 t, m* f' J. O - [son] => Array
( @3 z; P5 l6 [" i; n - (
* Z) }( L# a- O - [0] => Array
8 H o6 ^( ~" D - (4 u4 a! `$ k( H. O3 p; O9 e' g
- [id] => 18+ w8 I9 {' p6 ^$ Z" z3 _% w# M1 B; y1 G
- [pid] => 162 E: ~% f( E% b5 o2 h& A" O
- [name] => 义源村
' { ~6 O+ b5 Y+ N \; I* V - )" ?6 P) m" J8 ]- F+ i0 j; G
- / a1 p2 I! b- Z4 H# W J2 q
- [1] => Array: B# U# S2 v: C
- (
# S$ j; o& d! T$ Q1 L; D - [id] => 194 I \8 J: |+ {" _
- [pid] => 16' l5 z/ @. X8 S. w/ C
- [name] => 上坝村
& {8 C* y1 P6 M( r- V - )+ _' Y' f; T3 j) ]2 ?2 C2 P R- y
- + g( D* K% d9 ]5 G4 w1 H# ]
- )
/ i; j9 j) ]4 x! h$ K* F8 a9 m -
4 }: X! [% ^8 q0 e6 I' c( G - )
2 w* _+ R+ n9 V; @2 L -
3 S; B) t# U1 f0 F3 t - [1] => Array& G; G. P6 e3 U# E
- (8 L4 h4 Y# |$ P& r
- [id] => 17" S4 @, T& L% p" X2 v# P# _6 Q4 u
- [pid] => 148 u+ T; Q4 @$ u8 p0 I# S* B
- [name] => 大田乡2 Q2 ~' J5 D/ \, I1 l. B
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- [1] => Array& Q ~. Y/ K& F) [( c8 z8 r
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6 u: R* L! o: ~; F* H v" t - [id] => 15
0 e1 ^) {% J' W, L( G - [pid] => 13
3 ~6 }$ d, H- @ - [name] => 于都县" d4 A; X; W+ b* m
- ) |( b+ G7 K. N" y
-
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- [1] => Array( x$ H" d- W" p. T5 e' p
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2 }3 w% Z+ @2 P2 d5 e" M! d; i - [id] => 2; C, Y+ f4 H* c2 I0 X2 }9 ]0 }1 I
- [pid] => 0
3 p) a- l/ ` l1 V, Z - [name] => 黑龙江省
+ D/ m( E5 t- x+ M - [son] => Array2 F; \8 {+ ^9 ?3 [$ G6 m* T9 { V
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) P' X$ M, Y- k" N% w8 ~ - [0] => Array! @' s/ U6 W5 q/ I: k3 u) X0 @
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- [id] => 4
J$ t" L6 | y, P M* I5 a/ [) N0 g! q - [pid] => 2
) K* w, H7 N/ j* K3 @4 x0 v - [name] => 哈尔滨市
" l8 {" U/ R/ o2 B3 z - [son] => Array
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/ \; k$ s7 n( x& D/ z3 ~, ]$ G - [0] => Array
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- [id] => 6
1 l, t( l+ m4 }3 b9 l - [pid] => 4
0 r2 L+ Z4 W: d, |/ u3 o - [name] => 香坊区
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7 p4 j" \8 J9 N9 D - [id] => 8
3 L4 R6 d! p; A& c6 v/ Y$ r - [pid] => 61 [! ^; [+ E4 A' i; {0 X. ?
- [name] => 和兴路9 G' d" p3 J X
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- (4 d P5 x3 t) ~" K: \6 B0 A; k
- [id] => 10
7 |5 _8 q# O) E7 z# ~- H) f; n - [pid] => 8
) W& K& x6 E/ P8 h; w, P - [name] => 8 T c) P1 }. Z- e2 y# [
- 东北林业大学1 v, W' v5 e& ]+ u2 D' N+ f5 ] R8 x
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- [1] => Array/ [' `- E% d9 T; c& y" V) M. S3 X
- (8 o4 D% E% b, t' c* F
- [id] => 12 P- n' ^* x5 n& R
- [pid] => 8
+ q$ l) f6 d; d) ~* ^9 Q2 D2 I - [name] => ( |1 l. J5 @, l( L' i
- 哈尔滨师范大学
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- [id] => 7
$ w7 `& X% b* K1 e* O- A: t w - [pid] => 4
# A$ x" }9 [8 [9 K - [name] => 南岗区
8 B' A8 E" F! b* H# B - [son] => Array
# ]3 G; p; Y$ @& S - (* d* h2 M7 `/ k/ q5 [0 G
- [0] => Array& J5 e1 C, m: g. J1 {. H
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- [id] => 9 ^2 W2 u& c- }) w0 Y8 h9 d2 B
- [pid] => 7- u( M v5 g& B; t# q" K: A4 Q
- [name] => 西大直街9 J9 \4 Z: f7 F
- [son] => Array
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: o2 ~; q6 t) `9 U- T k7 o1 z+ Z- c4 g - [0] => Array
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5 P2 [7 A' y+ m% r9 n# U! a: z/ l - [id] => 11+ r u# F {5 F, K& t w" n
- [pid] => 91 e$ O" _: l( ]9 O9 V
- [name] =>
3 `; i0 Z/ x! o" h - 哈尔滨工业大学( U/ A' K& ~( ]
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-
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- (2 [" ?, g* Q+ k2 _
- [id] => 5
0 b7 n' W+ z, u/ k1 j - [pid] => 2
+ S7 y3 k" h6 R - [name] => 鸡西市0 c }" c, A+ j% G) U7 H7 ~9 M# G9 l
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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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