Managing `wp-config.php` files for different environments. This allows you to version control your configurations.

wp-config.environments.php

<?php
/** Loads environment specific config files for WordPress.
 *   See https://github.com/studio24/wordpress-multi-env-config and/or http://abandon.ie/notebook/wordpress-configuration-for-multiple-environments
 *
 *   Environment can be:
 *   1. Directly loaded via an Environment variable (Name: WP_ENV)
 *   2. Looks the ServerName attribute
 *   3. Default to production (if no other one is found)
 *
 *   ** Usage **
 *   a. Add the following to your wp-config.php file.
 *
 *       $environments = array(
 *           'development' => 'coderpad.local',
 *           'production' => 'coderpad.io'
 *       );
 *       include 'wp-config.environments.php';
 *
 *   b. Add environment specific files with DB connection information, named like so:
 *       wp-config.production.php
 *       wp-config.development.php
 **/

// Try environment variable 'WP_ENV'
if ( getenv( 'WP_ENV' ) !== false ) {
	// Filter non-alphabetical characters for security
	define( 'WP_ENVIRONMENT_TYPE', preg_replace( '/[^a-z]/', '', getenv( 'WP_ENV' ) ) );
}

if ( ! defined( 'WP_ENVIRONMENT_TYPE' ) ) {
	// Get Server name
	$server_name = $_SERVER['SERVER_NAME'];

	foreach ( $environments as $key => $env ) {
		if ( strstr( $server_name, $env ) ) {
			define( 'WP_ENVIRONMENT_TYPE', $key );
			break;
		}
	}
}
// If no environment is set default to production
if ( ! defined( 'WP_ENVIRONMENT_TYPE' ) ) {
	define( 'WP_ENVIRONMENT_TYPE', 'production' );
}

// Load config file for current environment
require 'wp-config.' . WP_ENVIRONMENT_TYPE . '.php';

wp-config.local.php

<?php
// You can git-ignore the local development wp-config file which may be different for different developers  

define( 'WP_SITEURL', '' );
define( 'WP_HOME', '' );
define( 'DB_NAME', 'local' );
define( 'DB_USER', 'root' );
define( 'DB_PASSWORD', 'root' );
define( 'DB_HOST', 'localhost' );

define( 'WP_REDIS_DISABLED', true );
define( 'EMPTY_TRASH_DAYS', 0 );
define( 'WP_DEBUG', true );

// If WP_DEBUG is true then enable other fun goodies
if ( WP_DEBUG ) {
	define( 'WP_DEBUG_LOG', true );
	define( 'SAVEQUERIES', true );
}

wp-config.php

<?php
// Add this to your wp-config.php file
$environments = array(
	'local'      => 'example.local',
	'staging'    => 'staging.example.com',
	'production' => 'example.com',
);
require dirname( __FILE__ ) . '/wp-config.environments.php';

wp-config.production.php

<?php
// See a list of wp-config constants https://gist.github.com/MikeNGarrett/e20d77ca8ba4ae62adf5 

$host = $_SERVER['SERVER_NAME'];
define( 'WP_SITEURL', 'https://' . $host );
define( 'WP_HOME', 'https://' . $host );
define( 'DB_NAME', '' );
define( 'DB_USER', '' );
define( 'DB_PASSWORD', '' );
define( 'DB_HOST', 'localhost' );

// Prevent plugin updates and file editing
define( 'FS_METHOD', 'direct' );
define( 'DISALLOW_FILE_EDIT', true );
define( 'DISALLOW_FILE_MODS', true );

// Define directroy and file permissions
define( 'FS_CHMOD_DIR', ( 0775 & ~ umask() ) );
define( 'FS_CHMOD_FILE', ( 0664 & ~ umask() ) );

// Object caching
define( 'WP_CACHE', true );
define( 'WP_REDIS_PREFIX', 'prod_' );

// Use external cron instead of WordPress' cron
define( 'DISABLE_WP_CRON', true );