本文章介紹了一段關(guān)于不用遞歸實(shí)現(xiàn)php樹(shù)程序代碼,實(shí)例代碼如下:

1. /** 
2.  * 創(chuàng)建父節(jié)點(diǎn)樹(shù)形數(shù)組 
3.  * 參數(shù) 
4.  * $ar 數(shù)組，鄰接列表方式組織的數(shù)據(jù) 
5.  * $id 數(shù)組中作為主鍵的下標(biāo)或關(guān)聯(lián)鍵名 
6.  * $pid 數(shù)組中作為父鍵的下標(biāo)或關(guān)聯(lián)鍵名 
7.  * 返回 多維數(shù)組 
8.  **/ 
9. function find_parent($ar, $id='id', $pid='pid') { 
10.   foreach($ar as $v) $t[$v[$id]] = $v; 
11.   foreach ($t as $k => $item){ 
12.     if( $item[$pid] ){ 
13.       if( ! isset($t[$item[$pid]]['parent'][$item[$pid]]) ) 
14.          $t[$item[$id]]['parent'][$item[$pid]] =& $t[$item[$pid]]; 
15.     } 
16.   } 
17.   return $t; 
18. } 
19.  
20.  
21. /** 
22.  * 創(chuàng)建子節(jié)點(diǎn)樹(shù)形數(shù)組 
23.  * 參數(shù) 
24.  * $ar 數(shù)組，鄰接列表方式組織的數(shù)據(jù) 
25.  * $id 數(shù)組中作為主鍵的下標(biāo)或關(guān)聯(lián)鍵名 
26.  * $pid 數(shù)組中作為父鍵的下標(biāo)或關(guān)聯(lián)鍵名 
27.  * 返回 多維數(shù)組 
28.  **/ 
29. function find_child($ar, $id='id', $pid='pid') { 
30.   foreach($ar as $v) $t[$v[$id]] = $v; 
31.   foreach ($t as $k => $item){ 
32.     if( $item[$pid] ) { 
33.       $t[$item[$pid]]['child'][$item[$id]] =& $t[$k]; 
34.     } 
35.   } 
36.   return $t; 
37. } 
38.  
39.     $data = array( 
40.       array('ID'=>1, 'PARENT'=>0, 'NAME'=>'祖父'), 
41.       array('ID'=>2, 'PARENT'=>1, 'NAME'=>'父親'), 
42.       array('ID'=>3, 'PARENT'=>1, 'NAME'=>'叔伯'), 
43.       array('ID'=>4, 'PARENT'=>2, 'NAME'=>'自己'), 
44.       array('ID'=>5, 'PARENT'=>4, 'NAME'=>'兒子'), 
45.     ); 
46.  
47.     $p = find_parent($data, 'ID', 'PARENT'); 
48.     $c = find_child($data, 'ID', 'PARENT'); 
49.     Print_r ($c); 
50. /*  
51. 結(jié)果如下: 
52. Array 
53. ( 
54.     [1] => Array 
55.         ( 
56.             [ID] => 1 
57.             [PARENT] => 0 
58.             [NAME] => 祖父 
59.             [child] => Array 
60.                 ( 
61.                     [2] => Array 
62.                         ( 
63.                             [ID] => 2 
64.                             [PARENT] => 1 
65.                             [NAME] => 父親 
66.                             [child] => Array 
67.                                 ( 
68.                                     [4] => Array 
69.                                         ( 
70.                                             [ID] => 4 
71.                                             [PARENT] => 2 
72.                                             [NAME] => 自己 
73.                                             [child] => Array 
74.                                                 ( 
75.                                                     [5] => Array 
76.                                                         ( 
77.                                                             [ID] => 5 
78.                                                             [PARENT] => 4 
79.                                                             [NAME] => 兒子 
80.                                                         ) 
81.  
82.                                                 ) 
83.  
84.                                         ) 
85.  
86.                                 ) 
87.  
88.                         ) 
89.  
90.                     [3] => Array 
91.                         ( 
92.                             [ID] => 3 
93.                             [PARENT] => 1 
94.                             [NAME] => 叔伯 
95.                         ) 
96.  
97.                 ) 
98.  
99.         ) 
100.  
101.     [2] => Array 
102.         ( 
103.             [ID] => 2 
104.             [PARENT] => 1 
105.             [NAME] => 父親 
106.             [child] => Array 
107.                 ( 
108.                     [4] => Array 
109.                         ( 
110.                             [ID] => 4 
111.                             [PARENT] => 2 
112.                             [NAME] => 自己 
113.                             [child] => Array 
114.                                 ( 
115.                                     [5] => Array 
116.                                         ( 
117.                                             [ID] => 5 
118.                                             [PARENT] => 4 
119.                                             [NAME] => 兒子 
120.                                         ) 
121.  
122.                                 ) 
123.  
124.                         ) 
125.  
126.                 ) 
127.  
128.         ) 
129.  
130.     [3] => Array 
131.         ( 
132.             [ID] => 3 
133.             [PARENT] => 1 
134.             [NAME] => 叔伯 
135.         ) 
136.  
137.     [4] => Array 
138.         ( 
139.             [ID] => 4 
140.             [PARENT] => 2 
141.             [NAME] => 自己 
142.             [child] => Array 
143.                 ( 
144.                     [5] => Array 
145.                         ( 
146.                             [ID] => 5 
147.                             [PARENT] => 4 
148.                             [NAME] => 兒子 
149.                         ) 
150.  
151.                 ) 
152.  
153.         ) 
154.  
155.     [5] => Array 
156.         ( 
157.             [ID] => 5 
158.             [PARENT] => 4 
159.             [NAME] => 兒子 
160.         ) 
161.  
162. ) 
163. */