How to rewrite attachment thumbnail URLs?

I'm trying to rewrite my attachment thumbnail URLs from outside of a vBulletin Folder. The code I have right now is

Code:

include_once 'includes/functions_vbseo.php';
vbseo_get_options();
vbseo_prepare_seo_replace();
get_forum_info();

vbseo_any_url('attachment.php?attachmentid='.$thread["attachmentid"].'&stc=1&thumb=1&d='.$thread["thumbnail_dateline"])

Any help?

Also, will this cause the images to be cached by the browser?

Thanks

I'm trying to write a custom rule to rename thumbnail attachments. I have

Code:

'^attachment\.php\?attachmentid=(\d+)&stc=1&thumb=1&d=(\d+)&name=(.+)' => 'attachment/$1$2/$3'

where name is pulled from the DB and put into the url. However

Code:

vbseo_any_url("attachment.php?attachmentid=217&stc=1&thumb=1&d=1164782277&name=202588730");

just returns the url with no rewrite.

Why doesn't this work. Is it because it's conflicting with a built in attachment rewrite rule?

Hello Wongod,

yes, Custom Rewrite Rules are not applied to default vBulletin scripts (those having URL formats defined by default in vbseocp).

** merged threads **

So is there any way to accomplish this?

You can rename attachments script and then create CRRs for new filename (attachment2.php, for instance).

Thanks, so I tried it out and got the rewrite to work, but the redirect does not.

Code:

 'http://www.domain.com/forums/'.vbseo_any_url("fpattachment.php?attachmentid=217&stc=1&thumb=1&d=1164782277&name=202588730.jpg");
 =
 http://www.domain.com/forums/attachment/2171164782277/202588730.jpg

which is correct. However the rewritten address gives me the "Invalid Attachment specified." error.

When I turn off the custom rewrite rule and use the original URL, the attachment loads correctly.

What's wrong?

Since both $1 and $2 are numbers in your case, you should separate them in rewritten URL, for instance:
'attachment/$1-$2/$3'

Thanks Oleg! It works now. Do you happen to know if this will cause the images to get cached?

Yes, but that depends on browser. You can send cache related http headers in the script to make sure it is cached (or not cached).