[php] multi-dimensional array sort

$arr = array(    
 
    'index'=>array( 'name'=>'首页','order'=>3),
 
    'intro'=>array( 'name'=>'企业概况','order'=>2),
 
    'news'=>array( 'name'=>'新闻动态','order'=>1 ),
 
    'product'=>array( 'name'=>'产品中心','order'=>4 ),
 
    'message'=>array( 'name'=>'访客留言','order'=>7 ),
 
    'position'=>array( 'name'=>'人才招聘','order'=>6),
 
    'contact'=>array( 'name'=>'联系我们','order'=> 5 )
 
);
 
uasort($arr, 'cmp');
 
public function cmp($a, $b){
 
   return $a['order'] - $b['order'];
 
}