/* 二维数组按指定的键值排序
* $array 数组
* $key排序键值
* $type排序方式
*/
function array_sort($arr, $keys, $type = 'desc') {
$keysvalue = $new_array = array();
foreach ($arr 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] = $arr[$k];
}
return $new_array;
} 