转载：原文链接：http://blog.csdn.net/liruxing1715/article/details/28265495
/**
* 二维数组根据某个字段排序
* 功能：按照用户的年龄倒序排序
* @author ruxing.li
*/
header('Content-Type:text/html;Charset=utf-8');
$arrUsers=array(
array(
'id'=> 1,
'name'=>'张三',
'age'=> 25,
),
array(
'id'=> 2,
'name'=>'李四',
'age'=> 23,
),
array(
'id'=> 3,
'name'=>'王五',
'age'=> 40,
),
array(
'id'=> 4,
'name'=>'赵六',
'age'=> 31,
),
array(
'id'=> 5,
'name'=>'黄七',
'age'=> 20,
),
);
$sort=array(
'direction'=>'SORT_DESC',//排序顺序标志 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);
/*
输出结果：
array (size=5)
0 =>
array (size=3)
'id' => int 5
'name' => string '黄七' (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 '张三' (length=6)
'age' => int 25
3 =>
array (size=3)
'id' => int 4
'name' => string '赵六' (length=6)
'age' => int 31
4 =>
array (size=3)
'id' => int 3
'name' => string '王五' (length=6)
'age' => int 40
*/
