PHP フォームでデータの並べ替えとランキングを処理する方法

$scores = array($_POST['score1'], $_POST['score2'], $_POST['score3']);

sort($scores);

rsort($scores);

$rankedScores = array_flip($scores);

<?php
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    // 将得分存储在数组中
    $scores = array($_POST['score1'], $_POST['score2'], $_POST['score3']);

    // 对得分进行降序排序
    rsort($scores);

    // 将索引和值交换，得到排名
    $rankedScores = array_flip($scores);

    // 输出排名和得分
    foreach ($rankedScores as $rank => $score) {
        echo '第' . ($rank + 1) . '名: ' . $score . '<br>';
    }
}
?>

<form method="POST">
    <label for="score1">得分1:</label>
    <input type="number" name="score1" id="score1" required><br>

    <label for="score2">得分2:</label>
    <input type="number" name="score2" id="score2" required><br>

    <label for="score3">得分3:</label>
    <input type="number" name="score3" id="score3" required><br>

    <input type="submit" value="提交">
</form>