Is it possible to force Views to always lowercase URL paths? Here is a detailed example. I'm using contextual filters to filter by node field (field's name is country). Here are the node examples:

Node title: Madrid | country: spain
Node title: Rome | country: italy

Country name values are intentionally lowercased. Now I create a country contextual filter with this path: results/%. These are the results:

Path: results/spain
Result: Madrid

Path: results/Spain
Result: Madrid

Path: Results/Spain
Result: Madrid

I want the results to be available only on these paths:



Is there a way to force Views to convert all of the paths to lowercase letters? If it's not possible in Views, is there a way to make Drupal convert all of the URL requests to lowercase paths?

1 Answer 1


This is untested, but I believe you can use a hook_url_outbound_alter() for this, since I think Views URLs still get run through url() when they get generated:

function MYMODULE_url_outbound_alter(&$path, &$options, $original_path) {
  $path = drupal_strtolower($path);

(Updates to address some comments post acceptance.)

This should update URLs that get generated by Views, and will prevent the uppercased ones from getting out into the wild.

Drupal 7 is case-insensitive with regards to inbound URL routing. However, I am not 100% sure this is always the case with Views arguments being pulled from the URL. I suspect that the base part of the path w/o the argument is being matched by Drupal as case-insensitive, and the argument is matching case-insensitive because of database collation being case-insensive.

  • Thank you! It's not outbound_alter, but inbound_alter. Please change that, so that I can accept the answer. Are there any potential side-effects to this? All of my URLs are lowercased and I don't have any worries about that, but are there potential performance issues or strange redirects?
    – take2
    Apr 7, 2016 at 16:11
  • @take2 I will update the answer later. This is a bit of a weird situation b/c Drupal 7 inbound URLs are case-insensitive. I think this is a weird Views thing.
    – mpdonadio
    Apr 7, 2016 at 16:20
  • I was surprised to learn that even the default Views pages accept both versions (e. g. example.com/viewspage and example.com/ViewsPage).
    – take2
    Apr 7, 2016 at 16:30

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