php如何创建数据库

$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database_name";

// 创立一个数据库毗连
$conn = new <a style="color:#f60; text-decoration:underline;" href="https://www.php.cn/zt/15713.html" target="_blank">mysql</a>i($servername, $username, $password);

// 查抄毗连能否顺利
if ($conn->connect_error) {
    die("联接掉败: " . $conn->connect_error);
}

// 创立数据库
$sql = "CREATE DATABASE $dbname";
if ($conn->query($sql) === TRUE) {
    echo "数据库建立顺利";
} else {
    echo "数据库建立掉败: " . $conn->error;
}

// 选择新建立的数据库
$conn->select_db($dbname);

// 洞开数据库毗连
$conn->close();