Using Url Parameters in Rewrite Rule

Question

Well, I have tried to create a temporary redirect with wildcards:

http://www.example.com/index.php?topic=1578.0 to http://www.example.com/demo/showthread.php/1578

This is my htaccess:

RewriteEngine on
RewriteBase /

# Rules for topics:
RewriteRule ^index.php\?topic=([0-9\.0]+)$ /demo/showthread.php/$1

# Rule for homepage
RewriteRule ^index.php$ /demo/forum.php

My problem is with the rules for topics. Simply it does not redirect. Can you guide me the right direction?

Answer 1

A Query String Cannot be Matched Directly in the RewriteRule.

Use this instead:

RewriteCond %{QUERY_STRING} topic=([^&\s]+)
RewriteRule ^index.php /demo/showthread.php/%1? [L,R]