PHP中二维数组的排序方法

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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. 
   
2. // 说明：PHP中二维数组的排序方法
   
3. // 整理：http://www.CodeBit.cn
   
4. 
   
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. if (! is_array ( $ArrayData )) {
    
22.   return $ArrayData;
    
23. }
    
24. 
    
25. // Get args number.
    
26. $ArgCount = func_num_args ();
    
27. 
    
28. // Get keys to sort by and put them to SortRule array.
    
29. for($I = 1; $I < $ArgCount; $I ++) {
    
30.   $Arg = func_get_arg ( $I );
    
31.   if (! eregi ( "SORT", $Arg )) {
    
32.    $KeyNameList [] = $Arg;
    
33.    $SortRule [] = '$' . $Arg;
    
34.   } else {
    
35.    $SortRule [] = $Arg;
    
36.   }
    
37. }
    
38. 
    
39. // Get the values according to the keys and put them to array.
    
40. foreach ( $ArrayData as $Key => $Info ) {
    
41.   foreach ( $KeyNameList as $KeyName ) {
    
42.    ${$KeyName} [$Key] = $Info [$KeyName];
    
43.   }
    
44. }
    
45. 
    
46. // Create the eval string and eval it.
    
47. $EvalString = 'array_multisort(' . join ( ",", $SortRule ) . ',$ArrayData);';
    
48. eval ( $EvalString );
    
49. return $ArrayData;
    
50. }
    
51. //################# 示例 ################
    
52. $arr = array (array ('name' => '学习', 'size' => '1235', 'type' => 'jpe', 'time' => '1921-11-13', 'class' => 'dd' ), array ('name' => '中国功夫', 'size' => '153', 'type' => 'jpe', 'time' => '2005-11-13', 'class' => 'jj' ), array ('name' => '编程', 'size' => '35', 'type' => 'gif', 'time' => '1997-11-13', 'class' => 'dd' ), array ('name' => '中国功夫', 'size' => '65', 'type' => 'jpe', 'time' => '1925-02-13', 'class' => 'yy' ), array ('name' => '中国功夫', 'size' => '5', 'type' => 'icon', 'time' => '1967-12-13', 'class' => 'rr' ) );
    
53. print_r ( $arr );
    
54. //注意：按照数字方式排序时 153 比 65 小
    
55. $temp = sysSortArray ( $arr, "name", "SORT_ASC", "type", "SORT_DESC", "size", "SORT_ASC", "SORT_STRING" );
    
56. print_r ( $temp );

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