Sample Craft db file

craft_db.php

<?php

if ($_SERVER['SERVER_NAME'] == 'local.sitename')
{
    return array(
        'server' => 'localhost',
        'user' => 'user',
        'password' => 'password',
        'database' => 'database',
        'tablePrefix' => 'craft',
    );
} else {
    return array(
        'server' => 'production_db_location',
        'user' => 'user',
        'password' => 'password',
        'database' => 'database',
        'tablePrefix' => 'craft',
    );
}