Apache RewriteMap example

Today I needed to rewrite a list of about 1000 URL’s to a new location. Our product database was cleaned and new URL’s were created… Using RewriteMap from Apache’s Mod_rewrite comes in handy here.

In my case I needed to rewrite URL’s like this:




Where in my URL’s I had a 1000 different ‘poducts1234’ to rewrite to a new URL.


Here’s the HOWTO:

Create a textfile on your server with 2 columns. Something that would look like this:

And save it to a folder you wish, eg

from this file,  create a rewrite database,  more info: httxt2dbm

Once done,  open your vhosts config and add the following configuration:

A bit of clarification:

The line with content:

creates a condition that if the rewritemap contains the URI and the value is not “” (so an empty string) then it should perform the RewriteRule.

The rewrite rule itself is pretty obvious. It’ll rewrite the URL’s for which the rewritemap is found to the new product URL, and also keep the trailing parameters.

4 thoughts on “Apache RewriteMap example”

    1. Don’t think you need a rewrite map for this… Something like:

      RewriteEngine On
      RewriteRule ^(.*)/(.*)/(.*)/(.*).html$ /$4 [L]

      should work. (out of my head… you can test htaccess here)
      you’ll probably need to add some excludes as well

      1. Thanks for you reply.

        It seems to work with the rules you give me, but how could i do if the products are https://domaine.com/category/product-number.html

        Sometimes, it’s in juste one category, sometimes in two https://domaine.com/category/category/product-number.html or sometimes in 3 https://domaine.com/category/category/category/product-number.html

        Could i write a rule whom working on all this ?
        Do it will slow my website ? It is a better way than do a rewritemap ?

        It’s a prestashop by the way.


        1. Out of my head, try this:

          RewriteEngine On
          RewriteRule ^/(.+?)/?$ /$1 [L]

          (.+?) is a regex (it’s called the non-greedy regex) and will capture everything until last optional regex is found , so the product-number.html in your case.
          But, this might screw up more is not all subfolders in your uri are categories….

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