Php在下一个mysql查询中循环所有结果

<?php
// 连接到MySQL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("连接失败: " . $conn->connect_error);
}

// 执行查询
$sql = "SELECT * FROM table_name";
$result = $conn->query($sql);

// 循环处理结果
if ($result->num_rows > 0) {
    while ($row = $result->fetch_assoc()) {
        // 处理每行数据
        echo "字段1: " . $row["column1"] . "<br>";
        echo "字段2: " . $row["column2"] . "<br>";
        // ...
    }
} else {
    echo "没有结果";
}

// 关闭数据库连接
$conn->close();
?>