使用未排序的索引对数组进行排序

Question

我得到了一个这样的数组，它带有未排序的外部索引。

$a = array(
             (1) => array(1, 2, 3, 0, 5, 4),
             (0) => array(2, 1, 5, 0, 3, 4)
         );
echo "<br/>Before Sorting: ";
print_r($a);
foreach($a as $b)
  array_multisort($b, SORT_ASC, SORT_NUMERIC);
echo "<br/>After Sorting: ";
print_r($a);

这给了我如下输出

排序前：

Array
(
    [1] => Array
        (
            [0] => 1
            [1] => 2
            [2] => 3
            [3] => 0
            [4] => 5
            [5] => 4
        )

    [0] => Array
        (
            [0] => 2
            [1] => 1
            [2] => 5
            [3] => 0
            [4] => 3
            [5] => 4
        )

)

排序后：

Array
(
    [1] => Array
        (
            [0] => 1
            [1] => 2
            [2] => 3
            [3] => 0
            [4] => 5
            [5] => 4
        )

    [0] => Array
        (
            [0] => 2
            [1] => 1
            [2] => 5
            [3] => 0
            [4] => 3
            [5] => 4
        )

)

而我想要的是

$a = array(
              (0) => array(2, 1, 5, 0, 3, 4),
              (1) => array(1, 2, 3, 0, 5, 4)

          );

请告诉我如何处理......

Answer 1

仅使用ksort怎么样（因为您需要按键重新排序数组）？

$a = array(
  1 => array(1, 2, 3, 0, 5, 4),
  0 => array(2, 1, 5, 0, 3, 4)
);
echo "<br/>Before Sorting: ";
print_r($a);

ksort($a);
echo "<br/>After Sorting: ";
print_r($a);