RewriteCond to match query string parameters in any order

Question

I have a URL which may contain three parameters:

1. ?category=computers
2. &subcategory=laptops
3. &product=dell-inspiron-15

I

Answer 1

1) In case You just need to check that all parameters are in url:

   RewriteCond %{QUERY_STRING} (^|&)category\=computers($|&)
   RewriteCond %{QUERY_STRING} (^|&)subcategory\=laptops($|&)
   RewriteCond %{QUERY_STRING} (^|&)product\=dell\-inspiron\-15($|&)
   RewriteRule ^$ http://store.example.com/computers/laptops/dell-inspiron-15/? [R=301,L]

2) In case You need exact set of parameters:

 RewriteCond %{QUERY_STRING} ^&*(?:category\=computers|subcategory\=laptops|product\=dell\-inspiron\-15)(?!.*&\1(?:&|$))(?:&+(category\=computers|subcategory\=laptops|product\=dell\-inspiron\-15)(?!.*&\1(?:&|$))){2}&*$
 RewriteRule ^$ http://store.example.com/computers/laptops/dell-inspiron-15/? [R=301,L] 

This rule is generated by 301 redirect generator