php array_multisort（）：数组大小不一致

Question

我如何使用php array_multisort对数组进行排序？ 我找不到此类数组的任何示例。 我尝试了不同的方法，但是我不断收到错误array_multisort（）：数组大小不一致。

$array= Array (
    "Arnold" => Array ( "index" => 2, "games_played" => 1, "score" => 5 ),
    "Chris"  => Array ( "index" => 1, "games_played" => 1, "score" => 5 ),
    "Mike"   => Array ( "index" => 0, "games_played" => 2, "score" => 5 )
);

Answer 1

我认为您的做法不正确。 array_multisort不是其他语言中的“排序依据”（即：按某些属性对数组元素进行排序），而是对第一个数组进行排序，并将该顺序回荡到所有后续数组。 并且在相等的情况下，它检查第二个数组的对应值，等等。

如果要按分数（desc），按游戏方式，按索引（然后按名称）来排序示例，则应永远不会发生这种情况，因为索引是唯一的，所以应该这样做：

$array= Array (
    "Arnold" => Array ( "index" => 2, "games_played" => 1, "score" => 5 ),
    "Chris" => Array ( "index" => 1, "games_played" => 1, "score" => 5 ),
    "Mike" => Array ( "index" => 0, "games_played" => 2, "score" => 5 )
);
$names = [];
$indexes = [];
$games_played = [];
$scores = [];
foreach ($array as $name => $player) {
    $names[] = $name;
    $indexes[] = $player['index'];
    $games_played[] = $player['games_played'];
    $scores[] = $player['score'];
}
array_multisort(
    $scores, SORT_DESC,
    $games_played,
    $indexes,
    $names,
    $array /* This line will sort the initial array as well */
);