/**

* 二維數組根據某個字段排序

* 功能：按照用戶的年齡倒序排序

* @author xiaophp.cn

*/

$arrUsers = array(

array(

'id' => 1,

'name' => '張三',

'age' => 25,

),

array(

'id' => 2,

'name' => '李四',

'age' => 23,

),

array(

'id' => 3,

'name' => '王五',

'age' => 40,

),

array(

'id' => 4,

'name' => '趙六',

'age' => 31,

),

array(

'id' => 5,

'name' => '黃七',

'age' => 20,

),

);

$sort = array(

'direction' => 'SORT_DESC', //排序順序標志 SORT_DESC 降序；SORT_ASC 升序

'field' => 'age', //排序字段

);

$arrSort = array();

foreach($arrUsers AS $uniqid => $row){

foreach($row AS $key=>$value){

$arrSort[$key][$uniqid] = $value;

}

}

if($sort['direction']){

array_multisort($arrSort[$sort['field']], constant($sort['direction']), $arrUsers);

}

var_dump($arrUsers);

/*

輸出結果：

array (size=5)

0 =>

array (size=3)

'id' => int 5

'name' => string '黃七' (length=6)

'age' => int 20

1 =>

array (size=3)

'id' => int 2

'name' => string '李四' (length=6)

'age' => int 23

2 =>

array (size=3)

'id' => int 1

'name' => string '張三' (length=6)

'age' => int 25

3 =>

array (size=3)

'id' => int 4

'name' => string '趙六' (length=6)

'age' => int 31

4 =>

array (size=3)

'id' => int 3

'name' => string '王五' (length=6)

'age' => int 40

*/

總結

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