PHP多維數組排序

$User = M('User');
$Incomelog = M('incomelog');      
$user = $User->select();
$now_date = '2015-02-09';
$integral = array();
foreach($user as $key=>$v){
  $integral[$key][] =$user[$key]['integral'] = intval($Incomelog->where('uid = "'.$v['uid'].'" and date = "'.$now_date.'"')->sum('integral'));  //獲取每個會員的全部積分數
}


array_multisort($integral, SORT_DESC, $user);
               dump($user);