mysqli如何创建数据库

<?php
// 数据库连接配置
$servername = "localhost";
$username = "your_username";
$password = "your_password";

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

// 检查连接
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();
?>

if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

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