PHP を通じて従業員の勤怠データの出力をフォーマットするにはどうすればよいですか?

CREATE TABLE attendance (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(50) NOT NULL,
    department VARCHAR(50) NOT NULL,
    date DATE NOT NULL,
    time TIME NOT NULL
);

<?php
$dsn = "mysql:host=localhost;dbname=database";
$username = "username";
$password = "password";

try {
    $pdo = new PDO($dsn, $username, $password);
} catch (PDOException $e) {
    die("数据库连接失败：" . $e->getMessage());
}

<?php
$sql = "SELECT * FROM attendance";
$stmt = $pdo->query($sql);
$attendanceData = $stmt->fetchAll(PDO::FETCH_ASSOC);

<?php
// 按照部门分组
$departmentData = [];
foreach ($attendanceData as $attendance) {
    $department = $attendance['department'];
    if (!isset($departmentData[$department])) {
        $departmentData[$department] = [];
    }
    $departmentData[$department][] = $attendance;
}

// 按照日期和时间排序
foreach ($departmentData as &$department) {
    usort($department, function ($a, $b) {
        return strcmp($a['date'] . $a['time'], $b['date'] . $b['time']);
    });
}

// 格式化输出
foreach ($departmentData as $department => $attendances) {
    echo "$department 考勤数据：
";
    foreach ($attendances as $attendance) {
        $name = $attendance['name'];
        $date = $attendance['date'];
        $time = $attendance['time'];
        echo "姓名：$name    日期：$date    时间：$time
";
    }
    echo "
";
}