Drupal 7 settings.php database snippet

settings.php

$databases = array (
  'default' =>
  array (
    'default' =>
    array (
      'database' => 'dbname_db',
      'username' => '',
      'password' => '',
      'host' => '127.0.0.1',
      'port' => '',
      'driver' => 'mysql',
      'prefix' => '',
    ),
  ),
);