Php从数据库到xml

<?php
// 连接数据库
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";
$conn = new mysqli($servername, $username, $password, $dbname);

// 检查连接是否成功
if ($conn->connect_error) {
    die("连接数据库失败: " . $conn->connect_error);
}

// 查询数据库
$sql = "SELECT * FROM table";
$result = $conn->query($sql);

// 创建XML文档
$xmlDoc = new DOMDocument('1.0', 'UTF-8');
$xmlRoot = $xmlDoc->createElement("data");
$xmlDoc->appendChild($xmlRoot);

// 处理查询结果
if ($result->num_rows > 0) {
    while ($row = $result->fetch_assoc()) {
        // 创建XML元素
        $xmlRow = $xmlDoc->createElement("row");
        
        // 添加数据到XML元素
        foreach ($row as $key => $value) {
            $xmlField = $xmlDoc->createElement($key, $value);
            $xmlRow->appendChild($xmlField);
        }
        
        // 添加XML元素到根节点
        $xmlRoot->appendChild($xmlRow);
    }
}

// 保存XML文档
$xmlDoc->save("data.xml");

// 关闭数据库连接
$conn->close();
?>