需要帮助将MySQL查询到数组并输出到echo

<?php
// 连接到MySQL数据库
$servername = "数据库服务器地址";
$username = "数据库用户名";
$password = "数据库密码";
$dbname = "数据库名称";

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

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

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

// 将结果存储到数组
$data = array();
if ($result->num_rows > 0) {
    while ($row = $result->fetch_assoc()) {
        $data[] = $row;
    }
}

// 输出数组内容
foreach ($data as $row) {
    echo "字段1: " . $row["字段1"] . ", 字段2: " . $row["字段2"] . "<br>";
}

// 关闭数据库连接
$conn->close();
?>