Question

我知道还有其他一些关于使用多个条件进行排序的主题，但它们并不能解决我的问题。让我们说我有这个数组：

Array
(
    [0] => Array
        (
            [uid] => 1
            [score] => 9
            [endgame] => 2
        )

    [1] => Array
        (
            [uid] => 2
            [score] => 4
            [endgame] => 1
        )

    [2] => Array
        (
            [uid] => 3
            [score] => 4
            [endgame] => 100
        )

    [3] => Array
        (
            [uid] => 4
            [score] => 4
            [endgame] => 70
        )

)

我想对它进行排序，将最高分的那个放在最前面。在同样的分数上，我想要一个最低端赛号码的人。排序机制应该将user1排在最前面，然后是user2，然后是4，然后是user3。

我使用这种排序机制：

function order_by_score_endgame($a, $b)
{
  if ($a['score'] == $b['score'])
  {
    // score is the same, sort by endgame
    if ($a['endgame'] == $b['endgame']) return 0;
    return $a['endgame'] == 'y' ? -1 : 1;
  }

  // sort the higher score first:
  return $a['score'] < $b['score'] ? 1 : -1;
}
usort($dummy, "order_by_score_endgame");

这给了我以下数组：

Array
(
    [0] => Array
        (
            [uid] => 1
            [score] => 9
            [endgame] => 2
        )

    [1] => Array
        (
            [uid] => 3
            [score] => 4
            [endgame] => 100
        )

    [2] => Array
        (
            [uid] => 2
            [score] => 4
            [endgame] => 1
        )

    [3] => Array
        (
            [uid] => 4
            [score] => 4
            [endgame] => 70
        )

)

正如您所看到的，阵列没有正确排序......任何人都知道我做错了什么？非常感谢！

Answer 1

你的功能应该是这样的：

function order_by_score_endgame($a, $b){
if ($a['score'] == $b['score'])
    {
      // score is the same, sort by endgame
      if ($a['endgame'] > $b['endgame']) return 1;
    }
    // sort the higher score first:
    return $a['score'] < $b['score'] ? 1 : -1;
}

试一试。它会给你这样的结果：

Array
(
[0] => Array
    (
        [uid] => 1
        [score] => 9
        [endgame] => 2
    )

[1] => Array
    (
        [uid] => 2
        [score] => 4
        [endgame] => 1
    )

[2] => Array
    (
        [uid] => 4
        [score] => 4
        [endgame] => 70
    )

[3] => Array
    (
        [uid] => 3
        [score] => 4
        [endgame] => 100
    )

)

使用PHP中的多个条件对数组进行排序

1 个答案: