I'm trying to create a route for an RSS feed which allows for the following routes.


I have the first two routes working and the category fetching logic looks okay to me.

So far in my routes file I have the following

'feed' => 'feed/_index.twig',
'(?P<slug>[^/]+)/feed' => 'feed/_index',

// Additional New route
'(?P<slug>[^/]+)/(?P<slug>[^/]+)/feed' => 'feed/_index',

That last line was added recently as I thought the child category would include the parent category in its route.

I either get a 404 error without that new route, or when I do add that third route I get the following error

preg_match(): Compilation failed: two named subpatterns have the same    
name at offset 27 (craft/app/etc/web/UrlManager.php:387)

Any help would be greatly appreciated.

  • 1
    The error is because you've got two named subpatterns with the same name (<slug>). According to stackoverflow.com/a/7166444/684, you can do that as long as you use the (?J) option in your pattern. Not sure if that's going to solve your overall problem, so just adding this as a comment.
    – Brad Bell
    Jul 15, 2015 at 2:02

1 Answer 1


Brad nails the problem in his comment:

The error is because you've got two named subpatterns with the same name (<slug>)

And the solution is simple... Change the name(s) of your subpattern(s).

The term slug is just a convention of Craft. It doesn't matter what the names are, they can be anything useful to you:


Whatever values match those named patterns are automatically passed into the Twig template as "magic" variables. So your Twig template can now make use of the domain and category values.


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