Multiple Domains into Single Instance of WordPress

..WordPress - Multiple Domains

.htaccess

# BEGIN NO-WWW Redirection
<IfModule mod_rewrite.c>
RewriteEngine on
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^(.*)$ http://%1%{REQUEST_URI} [R=301,QSA,NC,L]
</IfModule>
# END NO-WWW Redirection

# BEGIN HTTPS Redirection
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{SERVER_PORT} !^443$
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]
</IfModule>
# END HTTPS Redirection

wp-config.php

/*
 * Handle multi domain into single instance of wordpress installation
 */
define('WP_SITEURL', 'https://' . $_SERVER['HTTP_HOST']);
define('WP_HOME', 'https://' . $_SERVER['HTTP_HOST']);