Question about mod_rewrite

Server Config
1

By a miracle from God, I came up with the following code several years ago, but its all Greek to me now. Can someone confirm if the following code pulls the number in the URL after convert2silver.com ?

RewriteCond %{HTTP_HOST} ^convert2silver\.com$ [NC]
RewriteRule ^(.*)$ http://www.convert2silver.com/$1 [R=301,L]
RewriteRule ^/?([0-9]+)/?$ index.php?x=$1 [L]

So convert2silver.com/2402 should end up with x=2402

Is this right? Then my PHP code should be able to get that value, to do a mySQL lookup with this:

$x = $_REQUEST[‘x’];

Thanks!

2

Yup, that’s what it does (in the third line). Plus it redirects non-www to www (first two lines).