LOCAL & PRODUCTION specific variables for a wordpress instance

wp-env.php

<?php
/**
 * @author Ahmad Karim <hello@ahmadkarim.com>
 *
 * DEV & PROD specific variables 
 * for WordPress when working with 
 * LOCAL & LIVE instances at the same time
 */

$localhosts = array('127.0.0.1', '::1');

$env = in_array($_SERVER['REMOTE_ADDR'], $localhosts) ? 'DEV' : 'PROD';

/**
 * DB Credentials for DEV & PROD
 */
$DBs = array();

$DBs['DEV'] = array(
  'NAME' => 'db_name',
  'USER' => 'db_user',
  'PASS' => 'db_pass',
  'HOST' => 'localhost',
  'PREFIX' => 'wp_',
  'CHARSET' => 'utf8mb4',
  'COLLATE' => '',
);

$DBs['PROD'] = array(
  'NAME' => 'db_name',
  'USER' => 'db_user',
  'PASS' => 'db_pass',
  'HOST' => 'localhost',
  'PREFIX' => 'wp_',
  'CHARSET' => 'utf8mb4',
  'COLLATE' => '',
);

$DB = $DBs[$env];

/**
 * URLs for DEV & PROD
 */
$URLs = array();

$URLs['DEV'] = array(
  'HOME' => 'http://instance-url.com.test',
  'SITEURL' => 'http://instance-url.com.test',
);

$URLs['PROD'] = array(
  'HOME' => 'https://instance-url.com',
  'SITEURL' => 'https://instance-url.com',
);

$URL = $URLs[$env];

/**
 * WP_DEBUG value for DEV & PROD
 */
$DEBUG = ($env == 'DEV' ? true : false);