.htaccess URL rewrite

Question

I used to have a rewrite rule to

RewriteRule ^([^/]+)\.htm$ index.php?c=$1 [NC]
RewriteRule ^([^/]+)\.htm/([0-9.]+)$ index.php?c=$1&amt=$2 [NC]

Now, I have to change to

RewriteRule ^1/([^/]+)\.htm$ index.php?c=$1 [NC]
RewriteRule ^1/([^/]+)\.htm/([0-9.]+)$ index.php?c=$1&amt=$2 [NC]
RewriteRule ^2/([^/]+)\.htm$ index2.php?c=$1 [NC]
RewriteRule ^2/([^/]+)\.htm/([0-9.]+)$ index2.php?c=$1&amt=$2 [NC]

The difference is adding a sub-directory.

My question is, how can I redirect my old links to the new 1/ sub-directory?

Answer 1

If i was understand you right

 RewriteRule ^([^/]+)\.htm$ /1/index.php?c=$1 [NC]
 RewriteRule ^([^/]+)\.htm/([0-9.]+)$ /1/index.php?c=$1&amt=$2 [NC]
 RewriteRule ^1/([^/]+)\.htm$ index.php?c=$1 [NC]
 RewriteRule ^1/([^/]+)\.htm/([0-9.]+)$ index.php?c=$1&amt=$2 [NC]
 RewriteRule ^2/([^/]+)\.htm$ index2.php?c=$1 [NC]
 RewriteRule ^2/([^/]+)\.htm/([0-9.]+)$ index2.php?c=$1&amt=$2 [NC]

Answer 2

If you want to redirect traffic from search engines, you should use 301 Redirect using something like:

RewriteRule ^([^12][^/]+)\.htm$ 1/index.php?c=$1 [R=301,L]

This will not work if some of your old files start by 1 or 2. If so, you can probably omit the [^12] and place this rule last. You will have to tag the old rules with last as well, replacing the [NC] by [NC,L].

Answer 3

Itai's answer is going in the right direction, but I don't think it's quite there yet. This is how I would do it:

RewriteRule ^([^/]+\.htm(/[0-9.]+)?)$ 1/$1 [NC,NS,L,R=301]

This will match those (and only those) URLs matched by your original two RewriteRules, and will prefix 1/ to them using an HTTP 301 redirect.