SQL + PHP显示多维数组

<?php
// 连接数据库
$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";
$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

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

// 将查询结果存储在多维数组中
$data = array();
if ($result->num_rows > 0) {
    while ($row = $result->fetch_assoc()) {
        $data[] = $row;
    }
}

// 遍历多维数组并显示数据
foreach ($data as $item) {
    echo "ID: " . $item['id'] . "<br>";
    echo "姓名: " . $item['name'] . "<br>";
    echo "年龄: " . $item['age'] . "<br>";
    // 其他字段...
    echo "<br>";
}

// 关闭数据库连接
$conn->close();
?>