I\'m trying to implement a solution using .htaccess and wildcard subdomains so that
http://subdomain.example.com is mapped to http://example.com/index.php/accounts/s
You probably need to exclude the index.php
from your rule:
RewriteCond %{HTTP_HOST} !^www\.example\.com$ [NC]
RewriteCond %{HTTP_HOST} ^(www\.)?([a-z0-9-]+)\.example\.com$ [NC]
RewriteRule !^index\.php($|/) index.php/accounts/%2%{REQUEST_URI} [PT,L]
Try changing your RewriteRule
to
RewriteRule ^/(.*)$ /index.php/accounts/%1/$1 [PT]
That will rewrite the URL to one that includes the subdomain and the original request URI.
EDIT: maybe it needs to be
RewriteRule ^(.*)$ /index.php/accounts/%1/$1 [PT]
as mentioned in the comments.
This is an adaptation of the code I use to redirect subdomains on my own site. I make no claims to it being best practice but it works;
RewriteCond %{HTTP_HOST} ^(.*)\.com$ [NC]
RewriteCond %1 !^(www)\.example$ [NC]
RewriteRule ^.*$ http://www.example.com/index.php/accounts/%1/ [R=301,L]