A local settings file for your db info

local.settings.php

<?php

$databases = array (
  'default' =>
  array (
    'default' =>
    array (
      'database' => 'db_name',
      'username' => 'db_pass',
      'password' => 'db_password',
      'host' => 'localhost',
      'port' => '',
      'driver' => 'mysql',
      'prefix' => '',
    ),
  ),
);