OT : help needed for a Apache 301 redirect using regex

[jbv at souslelogo.com]

yes of course, but that's not the point : there are thousands of links
that have
already been visited by googlebots and on the site upgrade that is about to
be put online, all these links will be changed from
  mydomain.com/foo.php?someName_someCode
to
  mydomain.com/?foo_someName_someCode
and we need to configure .htaccess with a permanent 301 redirect so that
all links already visited by bots don"t get lost...


>
> What's handling those URLs on the backend?  LC Server, PHP, or something
> else?
>
> If LC I would imagine you could alter the string following the domain to
> simply replace ".php?" with "_", no?
>