如何将会话数组存储到数据库中

<?php
// 连接数据库
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 将会话数组转换为字符串
$sessionData = $_SESSION['session_array'];
$sessionString = json_encode($sessionData);

// 执行插入操作
$sql = "INSERT INTO sessions (session_data) VALUES ('$sessionString')";
if ($conn->query($sql) === TRUE) {
    echo "会话数组已成功存储到数据库中";
} else {
    echo "存储失败: " . $conn->error;
}

// 关闭数据库连接
$conn->close();
?>