php多维数组 按某个键值排序

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function array_sort($array,$keys,$type='asc'){
    $keysvalue = $new_array = array();
    foreach ($array as $k=>$v){
        $keysvalue[$k] = $v[$keys];
    }
    if($type == 'asc'){
        asort($keysvalue);
    }else{
        arsort($keysvalue);
    }
    reset($keysvalue);
    foreach ($keysvalue as $k=>$v){
        $new_array[$k] = $array[$k];
    }
    return $new_array;
}