在PHP中排序多维关联数组

Question

我正在尝试按分数对以下数组进行排序

$questionsets = array(
    "A" => array("category" => "Some Category A", "score" => 0),
    "B" => array("category" => "Some Category B", "score" => 29),
    "C" => array("category" => "Some Category C", "score" => 12),
    "D" => array("category" => "Some Category D", "score" => 88),
    "E" => array("category" => "Some Category E", "score" => 4),
    "F" => array("category" => "Some Category F", "score" => 22),
    "G" => array("category" => "Some Category G", "score" => 20),
    "H" => array("category" => "Some Category H", "score" => 40),
    "I" => array("category" => "Some Category I", "score" => 42)
);

$questionsets = array_msort($questionsets, array('score'=>SORT_DESC));

这是行不通的，并且我找不到任何有帮助的文档或示例。 我试过使用array_multisort()和usort()但没有成功。

用score按降序对该数组排序的干净方法是什么？

Answer 1

如果您只对一个维度感兴趣，则无需使用多分类。 而是按分数降序排序：

usort($questionsets,function($a,$b){return $b['score']-$a['score'];});

现场演示