php怎么自己建立数据库服务器

<?php
$servername = "localhost";
$username = "root";
$password = "your_password";

// 创建连接
$conn = new mysqli($servername, $username, $password);

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

// 创建数据库
$sql = "CREATE DATABASE mydatabase";
if ($conn->query($sql) === TRUE) {
    echo "数据库创建成功";
} else {
    echo "Error creating database: " . $conn->error;
}

// 关闭连接
$conn->close();
?>

<?php
$servername = "localhost";
$username = "root";
$password = "your_password";
$dbname = "mydatabase";

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

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

// 插入数据
$sql = "INSERT INTO mytable (column1, column2, column3)
VALUES ('value1', 'value2', 'value3')";

if ($conn->query($sql) === TRUE) {
    echo "数据插入成功";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

// 关闭连接
$conn->close();
?>