php数组根据某值排序(array_multisort)

$a = [
    [
        "name" => "张三",
        "score" => 60
    ],
    [
        "name" => "李四",
        "score" => 90
    ],
    [
        "name" => "王二",
        "score" => 80
    ],
];
$score = [];
foreach ($a as $key => $value) {
    $score[$key] = $value["score"];
}
array_multisort($score, SORT_DESC, $a);
echo "<pre>";
var_dump($score);
var_dump($a);
echo "</pre>";
exit;