PHP8.1.2出现Fatal error: Uncaught mysqli_sql_exception: Access denied for user 'root'@'localhost' (using password: YES) ，求问应该怎么解决。

代码如下：

<?php
$servername = "localhost";
$username = "root";
$password = "password";
// 创建连接
$conn = new mysqli($servername, $username, $password);
// 检测连接
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}
echo "连接成功";
?>

出错如下：

Fatal error: Uncaught mysqli_sql_exception: Access denied for user 'root'@'localhost' (using password: YES) in D:\Program Files (x86)\httpd-2.4.52-o111m-x64-vc15\Apache24\htdocs\demo13.php:7 Stack trace: #0 D:\Program Files (x86)\httpd-2.4.52-o111m-x64-vc15\Apache24\htdocs\demo13.php(7): mysqli->__construct('localhost', 'root', ' ') #1 {main} thrown in D:\Program Files (x86)\httpd-2.4.52-o111m-x64-vc15\Apache24\htdocs\demo13.php on line 7

解决了！