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htaccess chaining rules with variables

Posted on 2010-08-30
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Last Modified: 2012-05-10
Hello experts,

I have a series of .htaccess rules that are working well on my Unix server.  I just need to add one extra rule to the chain and I don't know how to do it.  

Currently, for every request that comes in, I strip off the last part of the URL and attach it to a PHP page. Like this:

RewriteRule ^(db)\/(\w*)\/?(\d)?$ index.php?page=$1&dbid=$2&autoplay=$3
RewriteRule ^(db_search)\/(.*)$ index.php?page=$1&search=$2

I also need to add a rule that makes sure there is a www prefix, after all of the other rules have been exercised -- like this:

RewriteCond %{HTTP_HOST} ^mydomain\.com$ [NC]
RewriteRule ^(.*)$ http://www.mydomain.com/$1 [L]

I don't understand how to use the [E] or [ENV] flag to attach those variables ($1,$2,$3) to the last RewriteCond, so that if the entire request came in as http://mydomain/db/abc/123 or mydomain.com/db/abc/123, the URL would ultimately be http://www.mydomain/db/abc/123.

Thank you
-marc
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Question by:marcparillo
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by:oldmanbim
oldmanbim earned 1000 total points
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arober11 earned 1000 total points
ID: 33577485
Hi, loose the [L]  (Last) from the HTTP_HOST rewrite, and make it the first rule. Any URL modified by that URL will then just drop into your other rules, before possibly being returned to the users browser e.g.

RewriteCond %{HTTP_HOST} !^www.mydomain\.com$ [NC]
RewriteRule .* http://www.mydomain.com%{REQUEST_URI}
RewriteRule ^(db)\/(\w*)\/?(\d)?$ index.php?page=$1&dbid=$2&autoplay=$3
RewriteRule ^(db_search)\/(.*)$ index.php?page=$1&search=$2


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