Redirecting to a single domain

Redirecting to a single domain

If your website is running under several domain names, it is recommended to choose one main domain and make the redirection from other domains to the selected one. Place this part of the code at the beginning of your PHP script.

<?php
$redirect  = 'platon.sk';
$http_host = @$_SERVER['HTTP_HOST'];
$req_uri   = @$_SERVER['REQUEST_URI'];
if (strlen($http_host) > 0
    && strcasecmp($http_host, $redirect))
{
    header("Location: http://$redirect$req_uri");
    exit;
}
?>

The main advantages of this solution are mostly within the area of Search Engine Optimization (SEO):

• the same content sits on a single website (domain), which is what search engines like;
• the Google PageRank value is not split between several pages, but adds up for the one main page;
• as a result, the indexing of your website should improve, and so should its ranking in search engines.

Solution using the .htaccess

You can solve this problem using the .htaccess file as well.

Redirect from www to non-www:

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^ %{REQUEST_SCHEME}://%1%{REQUEST_URI} [R=301,L]
</IfModule>
					

Redirect from non-www to www:

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteRule ^ %{REQUEST_SCHEME}://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
</IfModule>