对多维数据指定元素排序

<?php

$str =array('1'=>array("id"=>'9',"c_name"=>"院长","order_setting"=>'130'),

'5'=>array("id"=>'8',
"c_name"=>"副院长","order_setting"=>'125'),

'7'=>array("id"=>'6',
"c_name"=>"主任","order_setting"=>'120'),

'3'=>array("id"=>'11',"c_name"=>"副主任","order_setting"=>'110'),

'2'=>array("id"=>'14', "c_name"=>"医生","order_setting"=>'45')

);

$ages = array();

foreach ($str as $user) {

$ages[] = $user['order_setting'];

}

array_multisort($ages, SORT_DESC, $str);

echo '<pre />';

var_dump($str);