通过php向数据库提交javascript变量

var myVariable = "Hello World";

<?php
// 建立与数据库的连接
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_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);
}

// 准备SQL语句
$sql = "INSERT INTO your_table (column_name) VALUES ('$myVariable')";

// 执行SQL语句
if ($conn->query($sql) === TRUE) {
    echo "变量已成功提交到数据库";
} else {
    echo "提交变量时出错: " . $conn->error;
}

// 关闭数据库连接
$conn->close();
?>