无法连接到数据库-PHP

我试图连接到数据库，但收到错误消息：

PDOException: could not find driver in E:'Drive'Dev'PHP'connect'index.php:3 Stack trace: #0 E:'Drive'Dev'PHP'connect'index.php(3): PDO->__construct('mysql:host=localhost;...', 'dbuser', 'dbpassword') #1 {main}

我使用XAMPP来运行Apache和MySQL。此外，我还配置了VirtualPorts，并通过其别名访问所有网站，例如"mysite/"而不是"localhost"

你能检查一下下面的代码并帮助我解决这个问题吗。提前感谢！

<?php
    try{
        $pdo = new PDO('mysql:host=localhost;dbname=carbrands', 'dbuser', 'dbpassword');
        $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
        $pdo->exec('SET NAMES "utf8"');
    }
    catch(PDOException $e){
        $output = 'not connected';
        $e->getMessage();
        include 'output.html';
        exit();
    }
    $output = 'connected';
    include 'output.html';
?>