tkphp mysql导出excel

<?php
require 'vendor/autoload.php';

use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;

// 连接 MySQL 数据库
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database_name";

$conn = new mysqli($servername, $username, $password, $dbname);

if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 查询数据
$sql = "SELECT id, name, email FROM users";
$result = $conn->query($sql);

// 创建 Excel 文件
$spreadsheet = new Spreadsheet();
$sheet = $spreadsheet->getActiveSheet();

// 设置表头
$sheet->setCellValue('A1', 'ID');
$sheet->setCellValue('B1', 'Name');
$sheet->setCellValue('C1', 'Email');

// 填充数据
$row = 2;
if ($result->num_rows > 0) {
    while($row_data = $result->fetch_assoc()) {
        $sheet->setCellValue('A' . $row, $row_data['id']);
        $sheet->setCellValue('B' . $row, $row_data['name']);
        $sheet->setCellValue('C' . $row, $row_data['email']);
        $row++;
    }
} else {
    echo "0 结果";
}

// 导出 Excel 文件
$writer = new Xlsx($spreadsheet);
$filename = 'exported_data.xlsx';
$writer->save($filename);

echo "数据已导出为 $filename";

$conn->close();
?>