PHP를 사용하여 양식에서 데이터 내보내기 및 가져오기를 처리하는 방법

$name = $_POST['name'];
$email = $_POST['email'];

// 邮箱验证
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
    echo "邮箱格式不正确";
} else {
    // 数据库存储操作
    $conn = new mysqli('localhost', 'username', 'password', 'database');
    if ($conn->connect_error) {
        die("数据库连接失败：" . $conn->connect_error);
    }
    
    $sql = "INSERT INTO users (name, email) VALUES ('$name', '$email')";
    if ($conn->query($sql) === TRUE) {
        echo "数据保存成功";
    } else {
        echo "数据保存失败：" . $conn->error;
    }
    $conn->close();
}

// 查询数据
$conn = new mysqli('localhost', 'username', 'password', 'database');
if ($conn->connect_error) {
    die("数据库连接失败：" . $conn->connect_error);
}
$sql = "SELECT * FROM users";
$result = $conn->query($sql);

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

// 写入表头
fputcsv($file, array('姓名', '邮箱'));

// 写入数据
if ($result->num_rows > 0) {
    while ($row = $result->fetch_assoc()) {
        fputcsv($file, array($row['name'], $row['email']));
    }
}

fclose($file);
$conn->close();

echo "数据导出成功，文件名为" . $filename;

// 读取CSV文件
$filename = "users.csv";
$file = fopen($filename, "r");

// 创建数据库连接
$conn = new mysqli('localhost', 'username', 'password', 'database');
if ($conn->connect_error) {
    die("数据库连接失败：" . $conn->connect_error);
}

// 清空表数据
$conn->query("DELETE FROM users");

// 逐行读取CSV文件，并存储数据
while (($data = fgetcsv($file)) !== FALSE) {
    $name = $data[0];
    $email = $data[1];
    
    // 数据库存储操作
    $sql = "INSERT INTO users (name, email) VALUES ('$name', '$email')";
    if ($conn->query($sql) === TRUE) {
        echo "数据导入成功";
    } else {
        echo "数据导入失败：" . $conn->error;
    }
}

fclose($file);
$conn->close();