CODEWITHSUNDEEP
regexapache.htaccessmod-rewritehttp-redirect
Unicycle
Unicycle

Reputation: 13

How to force www to replace subdomain in a generic way

I am using a shared codebase to support several domains, and I want to force the use of a www subdomain in .htaccess, replacing any other subdomain provided without otherwise altering the HTTP_HOST.

I've read several solutions on how to force www when a subdomain is not provided (e.g. example.com becomes www.example.com) and how to add www to the beginning of the HTTP_HOST (e.g. test.example.com becomes www.test.example.com). What I have NOT found is how to replace ANY subdomain (or lack thereof) with www while keeping the first and second level domains intact, whatever they might be.

I need a generic rule that will make all of the following rewrites (as 301s) without having to write rules for every TLD and every possible subdomain:

Upvotes: 1

Views: 128

Answers (1)

anubhava
anubhava

Reputation: 786359

You can use this rule for all the cases:

RewriteEngine on

RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteCond %{HTTP_HOST} ^(?:[^.]+\.)?(example\..+)$ [NC]
RewriteRule ^ http://www.%1%{REQUEST_URI} [R=301,L,NE]

Upvotes: 1

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