使用PHP开发的员工考勤报表模块在企业资源计划（ERP）系统中的应用

CREATE TABLE employee (
  id INT AUTO_INCREMENT PRIMARY KEY,
  name VARCHAR(50),
  employee_number VARCHAR(20)
);

CREATE TABLE attendance (
  id INT AUTO_INCREMENT PRIMARY KEY,
  employee_id INT,
  date DATE,
  start_time TIME,
  end_time TIME,
  FOREIGN KEY (employee_id) REFERENCES employee(id)
);

class AttendanceReport {
  private $db; // 数据库连接

  public function __construct($db) {
    $this->db = $db;
  }

  /**
   * 查询指定日期的考勤数据
   *
   * @param string $date 日期
   * @return array
   */
  public function getAttendanceByDate($date) {
    $query = "SELECT 
                employee.name, 
                attendance.start_time, 
                attendance.end_time 
              FROM 
                attendance 
              INNER JOIN 
                employee ON attendance.employee_id = employee.id 
              WHERE 
                attendance.date = :date";
    $stmt = $this->db->prepare($query);
    $stmt->bindParam(':date', $date);
    $stmt->execute();
    return $stmt->fetchAll(PDO::FETCH_ASSOC);
  }

  /**
   * 添加员工考勤记录
   *
   * @param int $employeeId 员工ID
   * @param string $date 日期
   * @param string $startTime 上班打卡时间
   * @param string $endTime 下班打卡时间
   * @return bool
   */
  public function addAttendance($employeeId, $date, $startTime, $endTime) {
    $query = "INSERT INTO attendance (employee_id, date, start_time, end_time) VALUES (:employeeId, :date, :startTime, :endTime)";
    $stmt = $this->db->prepare($query);
    $stmt->bindParam(':employeeId', $employeeId);
    $stmt->bindParam(':date', $date);
    $stmt->bindParam(':startTime', $startTime);
    $stmt->bindParam(':endTime', $endTime);
    return $stmt->execute();
  }
}

// 创建一个数据库连接
$db = new PDO("mysql:host=localhost;dbname=erp", "username", "password");

// 创建一个员工考勤报表实例
$attendanceReport = new AttendanceReport($db);

// 获取指定日期的员工考勤数据
$date = '2022-01-01';
$attendanceData = $attendanceReport->getAttendanceByDate($date);

// 输出员工考勤表格
echo "<table>";
echo "<tr><th>姓名</th><th>上班打卡时间</th><th>下班打卡时间</th></tr>";
foreach ($attendanceData as $row) {
  echo "<tr>";
  echo "<td>".$row['name']."</td>";
  echo "<td>".$row['start_time']."</td>";
  echo "<td>".$row['end_time']."</td>";
  echo "</tr>";
}
echo "</table>";