Set multiple domains in one wordpress

Question

I have wordpress in this domain:

http://www.Dummy.com/en

And want to use second domain such this:

 http://www.Dummy2.com

for this wordpress.

How can I redirect Dummy2 to Dummy?

This is some codes that I find out but I couldn't understand them:

wp-config.php

define('WP_SITEURL', ((is_ssl() == true) ? 'https://' : 'http://').$_SERVER['HTTP_HOST']);
define('WP_HOME', ((is_ssl() == true) ? 'https://' : 'http://').$_SERVER['HTTP_HOST']);

Answer 1

It is not a good practice, but:

$host = $_SERVER['HTTP_HOST'];
switch ($host) {
  case 'www.Dummy.com/en':
    define('WP_HOME', 'http://www.Dummy.com/en/'); 
  break;
  case 'www.Dummy2.com':
    define('WP_HOME', 'http://www.Dummy2.com/');
  break;
  default:
    define('WP_HOME', 'http://www.Dummy2.com/');
  break;
}

define('WP_SITEURL', WP_HOME);

Answer 2

The best practice is to setup a redirect on a web server side rather than trying to make your website to do so when WordPress doesn't support multiple domains out-of-the-box. Depending on your chosen web server setup there are two answers for you.

1. Apache

You can use the RedirectPermanent directive with a simple VirtualHost, read more here

#Location:/etc/httpd/conf/httpd.conf
<VirtualHost *:80>
        ServerName www.Dummy2.com
        RedirectPermanent / http://www.Dummy.com/en
</VirtualHost>

If only your Dummy2 website would be configured as a WordPress-based site too then,a ternatively, you can add a redirect rule to .htaccess inside of your DocumentRoot configured for www.Dummy2.com site.

RewriteEngine On
RewriteRule ^(.*)$ http://www.Dummy.com/en/$1 [R=301,L]

2. IIS

Make sure that you have an URL Rewrite module installed and simply create a new rewrite rule as follows:

<rule name="Dummy2.com" stopProcessing="true">
     <match url=".*" />
     <conditions>
         <add input="{HTTP_HOST}" pattern="^(.*)?Dummy2.com" />                 
     </conditions>
     <action type="Redirect" url="http://www.Dummy.com/en/{R:0}" />
 </rule>