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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。

<?php
// 说明:PHP中二维数组的排序方法
// 整理:http://www.CodeBit.cn
/**
* @package     BugFree
* @version     $Id: FunctionsMain.inc.php,v 1.32 2005/09/24 11:38:37 wwccss Exp $
*
*
* Sort an two-dimension array by some level two items use array_multisort() function.
*
* sysSortArray($Array,”Key1″,”SORT_ASC”,”SORT_RETULAR”,”Key2″……)
* @author                      Chunsheng Wang <wwccss@263.net>
* @param array   $ArrayData   the array to sort.
* @param string $KeyName1    the first item to sort by.
* @param string $SortOrder1 the order to sort by(“SORT_ASC”|”SORT_DESC”)
* @param string $SortType1   the sort type(“SORT_REGULAR”|”SORT_NUMERIC”|”SORT_STRING”)
* @return array                sorted array.
*/

function sysSortArray($ArrayData,$KeyName1,$SortOrder1 = “SORT_ASC”,$SortType1 = “SORT_REGULAR”)
{
if(!is_array($ArrayData))
{
return $ArrayData;
}
// Get args number.
$ArgCount = func_num_args();
// Get keys to sort by and put them to SortRule array.
for($I = 1;$I < $ArgCount;$I ++)
{
$Arg = func_get_arg($I);
if(!eregi(“SORT”,$Arg))
{
$KeyNameList[] = $Arg;
$SortRule[]    = ‘$’.$Arg;
}
else
{
$SortRule[]    = $Arg;
}
}
// Get the values according to the keys and put them to array.
foreach($ArrayData AS $Key => $Info)
{
foreach($KeyNameList AS $KeyName)
{
${$KeyName}[$Key] = $Info[$KeyName];
}
}
// Create the eval string and eval it.
$EvalString = ‘array_multisort(‘.join(“,”,$SortRule).’,$ArrayData);’;
eval ($EvalString);
return $ArrayData;
}


//################# 示例 #################
$arr = array(
array(
‘name’        =>    ‘学习’,
‘size’        =>    ‘1235’,
‘type’        =>    ‘jpe’,
‘time’        =>    ‘1921-11-13’,
‘class’        =>    ‘dd’,
),
array(
‘name’        =>    ‘中国功夫’,
‘size’        =>    ‘153’,
‘type’        =>    ‘jpe’,
‘time’        =>    ‘2005-11-13’,
‘class’        =>    ‘jj’,
),
array(
‘name’        =>    ‘编程’,
‘size’        =>    ’35’,
‘type’        =>    ‘gif’,
‘time’        =>    ‘1997-11-13’,
‘class’        =>    ‘dd’,
),
array(
‘name’        =>    ‘中国功夫’,
‘size’        =>    ’65’,
‘type’        =>    ‘jpe’,
‘time’        =>    ‘1925-02-13’,
‘class’        =>    ‘yy’,
),
array(
‘name’        =>    ‘中国功夫’,
‘size’        =>    ‘5’,
‘type’        =>    ‘icon’,
‘time’        =>    ‘1967-12-13’,
‘class’        =>    ‘rr’,
),
);
print_r($arr);
//注意:按照数字方式排序时 153 比 65 小
$temp = sysSortArray($arr,”name”,”SORT_ASC”,”type”,”SORT_DESC”,”size”,”SORT_ASC”,”SORT_STRING”);
print_r($temp);

?>