PHP .htaccess -> pretty url (in reverse)
Solution 1:
RewriteEngine on
# Prevents browser looping, which does seem
# to occur in some specific scenarios. Can't
# explain the mechanics of this problem in
# detail, but there we go.
RewriteCond %{ENV:REDIRECT_STATUS} 200
RewriteRule .* - [L]
# Hard-rewrite ("[R]") to "friendly" URL.
# Needs RewriteCond to match original querystring.
# Uses "?" in target to remove original querystring,
# and "%n" backrefs to move its components.
# Target must be a full path as it's a hard-rewrite.
RewriteCond %{QUERY_STRING} ^id=(\d+)&cat=(\d+)$
RewriteRule ^index\.php$ http://example.com/index/%1/%2/? [L,R]
# Soft-rewrite from "friendly" URL to "real" URL.
# Transparent to browser.
RewriteRule ^index/(\d+)/(\d+)/$ /index.php?id=$1&cat=$2
Of course, ideally, you'd just fix your links, and then you'd only require the soft-rewrite. :)
Tested with Apache/2.2.3. I think I made up the terms "hard-rewrite" and "soft-rewrite".