Multi Environments | WP-Config.php

wp-config.php

<?php
/** Absolute path to the WordPress directory. **/
if ( !defined('ABSPATH') )
   define('ABSPATH', dirname(__FILE__) . '/');


/** Define Environments **/
$environments = array(
    'localhost' => 'localhost',
    'development' => '',
    'staging' => '',
    'production' => ''
);

/** Get Server name **/
$server_name = $_SERVER['SERVER_NAME'];

/** Detect Environment **/
foreach($environments AS $key => $host){

	if ($server_name === $host) {
		
		define('ENVIRONMENT', $key);
		break;
		
	} 
	
}

/** Failsafe if no environment defined **/
if (!defined('ENVIRONMENT')) {
	
	echo '<h2>The detected host has not been defined, please define in the "Define Environments" section of the wp-config.php file.</h2>';
	echo '<br />';
	echo '<h3>Detected Host: ' . $server_name . '</h3>';
	echo '<hr />';
	
} else {

/** Load configuration based on the server's environment if environment is defined **/
require_once ABSPATH . 'wp-config/wp-config.' . strtolower(ENVIRONMENT) . '.php';
	
}

/** Sets up WordPress vars and included files. */
require_once(ABSPATH . 'wp-settings.php');
?>