尝试从mysql查询创建多维数组，php？

<?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";

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

// 创建多维数组
$multiArray = array();
if ($result->num_rows > 0) {
    while ($row = $result->fetch_assoc()) {
        $multiArray[] = $row;
    }
}

// 关闭数据库连接
$conn->close();

// 输出多维数组
print_r($multiArray);
?>