><cfset renamedOriginal = regex.replace(cffile.serverFile, "[^a-zA-Z0-9.]",
>"")>
ColdFusion does not have a built in "regex" object, as you are attempting to
use there.
To perform a regex replace, you need to use
rereplace("input","regex","replacement")
Also, your regex does not match your description:
> something to remove all non-alphanumeric characters,
> except the . before the extension.
You are currently accepting any . not just the last one.
Try this instead:
<cfset Extension = ListLast(cffile.ServerFile,'.')/>
<cfset NewFilename = rereplace( cffile.ServerFile , "\W|(\.#Extension#$)" , ''
, 'all' ) &'.'& Extension />
(Not that is not perfect, but should be good enough for your needs)
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