Mod_Rewrite not working when i add a query string

Question

I'm using the following rewrite rule in my .htaccess file, but whenever i add parameters to the string it makes the rewrite fail

RewriteRule ^c([0-9]+)/[a-zA-z0-9\-]+$ category.php?id=$1 [L]

For example:

If i go to the following, all works fine:

c87/newest-post

But if i go to:

c87/newest-post?param1=this&param2=that
c87/newest-post/?param1=this&param2=that

it redirects incorrectly and fails. I think it has something to do with the QSA tag, but with my poor knowledge of redirects i cant see what I'm doing wrong.

Salman Arshad · Accepted Answer · 2012-06-26 09:00:09Z

1

The QSA flag is required since you have specified a query string in the replacement URL:

When the replacement URI contains a query string, the default behavior of RewriteRule is to discard the existing query string, and replace it with the newly generated one. Using the [QSA] flag causes the query strings to be combined.

For the trailing slash you need an extra tweak. The suggested RewriteRule is:

RewriteRule ^c([0-9]+)/[a-zA-z0-9\-]+/?$ category.php?id=$1 [QSA,L]
# c87/newest-post?param1=this&param2=that  -> category.php?id=87&param1=this&param2=that
# c87/newest-post/?param1=this&param2=that -> category.php?id=87&param1=this&param2=that

edited Jun 26, 2012 at 9:00

answered Jun 26, 2012 at 8:53

Salman Arshad

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