PHP中二维数组的排序方法

本文介绍的是从 BugFree 摘录来的二维数组排序函数，可以实现类似 MySQL 的 ORDER BY 效果，当数组不是从数据库取得时会有特殊应用。

1. <?php
2. // 说明：PHP中二维数组的排序方法
3. // 整理：http://www.xker.com
5. /**
6. * @package     BugFree
7. * @version     $Id: FunctionsMain.inc.php,v 1.32 2005/09/24 11:38:37 wwccss Exp $
8. *
9. *
10. * Sort an two-dimension array by some level two items use array_multisort() function.
11. *
12. * sysSortArray($Array,"Key1","SORT_ASC","SORT_RETULAR","Key2"……)
13. * @author                      Chunsheng Wang <wwccss@263.net>
14. * @param  array   $ArrayData   the array to sort.
15. * @param  string  $KeyName1    the first item to sort by.
16. * @param  string  $SortOrder1  the order to sort by("SORT_ASC"|"SORT_DESC")
17. * @param  string  $SortType1   the sort type("SORT_REGULAR"|"SORT_NUMERIC"|"SORT_STRING")
18. * @return array                sorted array.
19. */
20. function sysSortArray($ArrayData,$KeyName1,$SortOrder1 = "SORT_ASC",$SortType1 = "SORT_REGULAR")
21. {
22.     if(!is_array($ArrayData))
23.     {
24.         return $ArrayData;
25.     }
27.     // Get args number.
28.     $ArgCount = func_num_args();
30.     // Get keys to sort by and put them to SortRule array.
31.     for($I = 1;$I < $ArgCount;$I ++)
32.     {
33.         $Arg = func_get_arg($I);
34.         if(!eregi("SORT",$Arg))
35.         {
36.             $KeyNameList[] = $Arg;
37.             $SortRule[]    = '$'.$Arg;
38.         }
39.         else
40.         {
41.             $SortRule[]    = $Arg;
42.         }
43.     }
45.     // Get the values according to the keys and put them to array.
46.     foreach($ArrayData AS $Key => $Info)
47.     {
48.         foreach($KeyNameList AS $KeyName)
49.         {
50.             ${$KeyName}[$Key] = $Info[$KeyName];
51.         }
52.     }
54.     // Create the eval string and eval it.
55.     $EvalString = 'array_multisort('.join(",",$SortRule).',$ArrayData);';
56.     eval ($EvalString);
57.     return $ArrayData;
58. }
61. //################# 示例 #################
62. $arr = array(
63.     array(
64.         'name'        =>    '学习',
65.         'size'        =>    '1235',
66.         'type'        =>    'jpe',
67.         'time'        =>    '1921-11-13',
68.         'class'        =>    'dd',
69.     ),
70.     array(
71.         'name'        =>    '中国功夫',
72.         'size'        =>    '153',
73.         'type'        =>    'jpe',
74.         'time'        =>    '2005-11-13',
75.         'class'        =>    'jj',
76.     ),
77.     array(
78.         'name'        =>    '编程',
79.         'size'        =>    '35',
80.         'type'        =>    'gif',
81.         'time'        =>    '1997-11-13',
82.         'class'        =>    'dd',
83.     ),
84.     array(
85.         'name'        =>    '中国功夫',
86.         'size'        =>    '65',
87.         'type'        =>    'jpe',
88.         'time'        =>    '1925-02-13',
89.         'class'        =>    'yy',
90.     ),
91.     array(
92.         'name'        =>    '中国功夫',
93.         'size'        =>    '5',
94.         'type'        =>    'icon',
95.         'time'        =>    '1967-12-13',
96.         'class'        =>    'rr',
97.     ),
98. );
100. print_r($arr);
102. //注意：按照数字方式排序时 153 比 65 小
103. $temp = sysSortArray($arr,"name","SORT_ASC","type","SORT_DESC","size","SORT_ASC","SORT_STRING");
105. print_r($temp);
107. ?>