Can I get the database login/password in an action?

I have a symfony action that creates a mysqldump of the database :

public function executeBackup(sfWebRequest $request)
{
    $dump = `mysqldump -u root -proot ec2`;
    $fp = fopen("php://temp", 'r+');
    fputs($fp, $开发者_StackOverflow中文版dump);
    rewind($fp);

    $this->setLayout(false);
    header('Content-Type: application/gzip');
    header('Content-Disposition: attachment; filename="db.sql"');
    header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
    $this->fichier = stream_get_contents($fp);
}

I've written the database login and password (root/root) in the action, but how can I get them from the yml configuration ?

Look at the code of this plugin, it's pretty self-explanatory.

I've found this answer on the old Symfony forum.

So retrieving login and password from databases.yml should look like:

$file = sfConfig::get('sf_config_dir').'/databases.yml';
$config = file_exists($file) ? sfYaml::load($file) : array();

$db_params = $config['prod']['propel']['param']; // should follow the databases.yml structure
$username = $db_params['username'];
$password = $db_params['password'];

HTH