执行基本SQL语句时出现内部服务器错误[重复]

I am working on my local wamp server and trying to retrieve data from a phpMyAdmin. But i am getting an error.

could not find driver 500 Internal Server Error - PDOException

my routing.yml

# This file is auto-generated during the composer install
parameters:
    database_driver: pdo_mysql
    database_host: www.example.com
    database_port: null
    database_name: mydb
    database_user: myuser
    database_password: mypass
    mailer_transport: smtp
    mailer_host: www.example.com
    mailer_user: null
    mailer_password: null
    locale: en
    secret: ThisTokenIsNotSoSecretChangeIt
    database_path: null

my controller

$connection = $this->get("database_connection");
$statement = $connection->prepare("SELECT * FROM table");
$statement->execute();
$tabs = $statement->fetchAll();

</div>

It looks like there's a driver issue. You need to make sure that your PHP environment has loaded pdo_mysql. For more info, see this post.