Example of drupal 7 local settings.php file.

drupal-7-example-local-settings.php

<?php

// To set up a local environment, make a duplicate of this file and name it 
// local-settings.inc in the site directory that contains the settings.php file.
// Ignore sites/*/local-settings.php in the .gitignore file. Change the settings.php
// file to include local-settings.php if the file exists.

// Point database to local service.
$databases['default']['default'] = array(
  'database' => 'local_db_name',
  'username' => 'root',
  'password' => 'root',
  'host' => 'localhost',
  'port' => '',
  'driver' => 'mysql',
  'prefix' => '',
);

// Turn off css and js consolidation for local development.
$conf['preprocess_css'] = 0;
$conf['preprocess_js'] = 0;

// Turn on all error reporting for local development.
error_reporting(-1);
$conf['error_level'] = 2;
ini_set('display_errors', TRUE);
ini_set('display_startup_errors', TRUE);