you mean this mod?
https://www.ubbdev.com/forum/showflat.php/Number/124272 I think the problem is that getimagesize() expects a valid path into the filesystem, so most probably you should use something like:
getimagesize('/home/whoever/public_html/images/filename');
this line here
$imagesunique[] = "http" . $out[$n]['2'] . "." . $out[$n]['3'];
may need to actually be rewritten to I would send Anno a PM
