通过php将MYSQL数据导出到Excel/CSV

<?php
// 数据库连接信息
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

// 检查连接
if ($conn->connect_error) {
  die("Connection failed: " . $conn->connect_error);
}

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

// 打开CSV文件
$filename = "mydata.csv";
$file = fopen($filename, "w");

// 将数据写入CSV文件
$header = array("ID", "Name", "Email");
fputcsv($file, $header);
while($row = $result->fetch_assoc()) {
  fputcsv($file, $row);
}

// 关闭文件和数据库连接
fclose($file);
$conn->close();

// 下载CSV文件
header("Content-type: text/csv");
header("Content-Disposition: attachment; filename=$filename");
header("Pragma: no-cache");
header("Expires: 0");
readfile("$filename");
unlink("$filename");
?>

<?php
// 数据库连接信息
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

// 检查连接
if ($conn->connect_error) {
  die("Connection failed: " . $conn->connect__error);
}

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

// 创建Excel文件
require 'vendor/autoload.php';
use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;

$spreadsheet = new Spreadsheet();
$sheet = $spreadsheet->getActiveSheet();

// 将数据写入Excel文件
$header = array("ID", "Name", "Email");
$sheet->fromArray($header, NULL, 'A1');
$row = 2;
while($data = $result->fetch_assoc()) {
  $sheet->setCellValue('A' . $row, $data['id']);
  $sheet->setCellValue('B' . $row, $data['name']);
  $sheet->setCellValue('C' . $row, $data['email']);
  $row++;
}

// 保存Excel文件
$filename = "mydata.xlsx";
$writer = new Xlsx($spreadsheet);
$writer->save($filename);

// 下载Excel文件
header("Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
header("Content-Disposition: attachment;filename=$filename");
header("Cache-Control: max-age=0");
$writer = \PhpOffice\PhpSpreadsheet\IOFactory::createWriter($spreadsheet, "Xlsx");
$writer->save("php://output");
exit;