RewriteRule and passed variables not working - apache

Question

I am trying to make my site more SEO friendly. I researched this and couple other sites and besically none of the solutions work. The URL rewrite works fine with this simple code:
RewriteRule ^testpage\.php$ destination.php [NC,L]
However, when I try to implement RewriteRule on pages that are dynamic and passing variable in URL, nothing happens. This is the code I have right now that does not work:
RewriteRule ^([^/]*)\.html$ /prodinfo.php?prodid=$1 [NC,L]
I would like to have http://www.mysite.com/products/prodinfo.php?id=268
converted to http://www.mysite.com/268.html
I am on Apache 2.2 with php.5.3 Thanks.

Answer 1

Is what you're looking for something like this?
RewriteEngine On
RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /products/prodinfo\.php\?id=([0-9]+)
RewriteRule ^ /%1.html? [L,R=301]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^([0-9]+).html$ /products/prodinfo.php?id=$1 [L]

Answer 2

Anyone who accesses: http://example.com/268.html in their browser has it converted server-side into: http://example.com/products/prodinfo.php?id=268 with this:
RewriteEngine On
#RewriteRule ^([0-9]+).html/?$ /products/prodinfo.php?id=$1 [NC]
... or to do the opposite and translate a visitor's request for: http://example.com/products/prodinfo.php?id=268 to http://example.com/268.html in their browser use:
RewriteEngine On
RewriteCond %{QUERY_STRING} id=([0-9]+)
RewriteRule ^products/prodinfo.php$ /%1.html? [R]