RewriteRule for several parameters - apache

Question

I'm currently working on a project powered by a home-made CMS and I'm experiencing some issues with URL rewriting.
Here's the thing: all the website is centralized around the index.php located in the main directory. Depending on what he gets thought the URL, the index.php displays the right page (the pages are included from a inc/pages/ folder)
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} (.+)/$
RewriteRule ^ %1 [L,R=301]
RewriteRule ^([A-Za-z0-9-]+)/?$ index.php?page=$1 [NC]
For a single parameter, it works great. http://demo.com/subscribe/ or demo.com/subscribe does transmit a $_GET['page'] to the index.
For some pages, I do need a second parameter. So it's not required for each single pages. Per example, http://demo.com/edit/I-love-Stackoverflow should transmit a $_GET['snd_param')
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} (.+)/$
RewriteRule ^ %1 [L,R=301]
RewriteRule ^([A-Za-z0-9-]+)/([A-Za-z0-9-]+)?$ index.php?page=$1&snd_param=$2 [NC]
I tried this but this isn't working well. First, if the second parameter is not mentioned (demo.com/edit) it's not working. The index doesn't receive the right $_GET['page']. Secondly, when the second parameter is mentionned, it "works" but apache believes this is a directory. My index page is then located in the fictive "I-love-Stackoverflow" folder and loading the CSS, images and javascript fails.
I hope I explained my issue pretty clearly ! Thanks in advance for helping me

Answer 1

You should treat the rules separately. All Conditions preceding rules only apply to a single rule, so basically the second RewriteRule is not executed at all.
You can use something like this:
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^([^/]+)$ index.php?page=$1 [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^([^/]+)/([^/]+)$ index.php?page=$1&snd_param=$2 [L]
My index page is then located in the fictive "I-love-Stackoverflow"
folder and loading the CSS, images and javascript fails.
You are probably load your assets using relative paths, so the browser only knows for the unmodified url ( http://demo.com/edit/I-love-Stackoverflow ) in your case, and the wrong urls are created when browser load the assets. If you load resources with absolute paths instead of relative, you will be okay.