My boilerplate wp-config.php file for working locally with WordPress

wp-config.php

<?php

if ( file_exists( dirname( __FILE__ ) . '/wp-local-config.php' ) ) {
  include( dirname( __FILE__ ) . '/wp-local-config.php' );
  define( 'WP_LOCAL_DEV', true ); // We'll talk about this later
} else {
  define('DB_NAME', 'database_name_here');
  define('DB_USER', 'username_here');
  define('DB_PASSWORD', 'password_here');
  define('DB_HOST', 'localhost');
}

define('DB_CHARSET', 'utf8');
define('DB_COLLATE', '');

// https://api.wordpress.org/secret-key/1.1/salt/
define('AUTH_KEY',         'put your unique phrase here');
define('SECURE_AUTH_KEY',  'put your unique phrase here');
define('LOGGED_IN_KEY',    'put your unique phrase here');
define('NONCE_KEY',        'put your unique phrase here');
define('AUTH_SALT',        'put your unique phrase here');
define('SECURE_AUTH_SALT', 'put your unique phrase here');
define('LOGGED_IN_SALT',   'put your unique phrase here');
define('NONCE_SALT',       'put your unique phrase here');

$table_prefix  = 'wp_';

define('WPLANG', '');
define('WP_DEBUG', false);
if ( !defined('ABSPATH') )
  define('ABSPATH', dirname(__FILE__) . '/');

require_once(ABSPATH . 'wp-settings.php');

wp-local-config.php

<?php
  //Local DB credentials
  define('DB_NAME', 'database_name_here');
  define('DB_USER', 'username_here');
  define('DB_PASSWORD', 'password_here');
  define('DB_HOST', 'localhost');