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Editorial Team
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Asked: 2026-06-12T12:27:14+00:00

I think I’m misunderstanding some fundamental thing here, as this is my first time

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I think I’m misunderstanding some fundamental thing here, as this is my first time using mod_rewrite.

I would like the following:

blog.example.com
blog.example.com/
blog.example.com/index.php

to redirect to:

example.com/blog

However, I would like all other cases to do nothing, e.g.

blog.example.com/foobar
blog.example.com/wp-admin
blog.example.com/wp-admin.php

This is my current .htaccess:

RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} =blog.example.com
RewriteCond %{REQUEST_URI} ^|/|index\.php$
RewriteRule ^(.*)$ http://www\.example\.com/blog [QSA,L]

I have tried many variants but each time either all requests redirect, or none redirect, so mod_rewrite is definitely doing something, just not what I want.

I have skimmed through this post for anything relevant, but I think the issue is more that I’m missing some subtle fact due to inexperience. Would someone kindly point out my error? I know we don’t need yet another mod_rewrite question on SO but I’m really struggling with this one. Thanks in advance.

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1 Answer

  1. Editorial Team

    Try this:

    RewriteEngine On
RewriteCond %{HTTP_HOST} =blog.example.com [NC]
RewriteRule ^/?(index\.php)?$ http://www.example.com/blog [QSA,R,L]

    Some basic points:

    1. The second part of the rewrite rule is not a regular expression, so periods do not need to be escaped there.

    2. I was not familiar with the =String option for RewriteCond. Thank you for teaching me something today (I was worried when I did not see a regex there but that should be fine)! I would add [NC] here since it will help match both lowercase and uppercase versions of your domain.

    3. None of this will work unless your virtual host includes the blog.example.com subdomain as a proper alias, and DNS is set up for that subdomain.

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