I am using the fileupload field to upload an image with a submission. How do I show the thumbnail of this image in the directory instead of just the link to the image ??

I got this answer from support, that works just perfectly:

Place this script in the "Scripts called on Listing Layout" in the directory.

$pattern = '#<a href="(.*?/submission-view-file/.*?)">.*?</a>#';
if (preg_match_all($pattern, $directoryLayout, $matches)){
foreach ($matches[0] as $i => $fullMatch){
$directoryLayout = str_replace($fullMatch, '<img src="'.$matches[1][$i].'"/>', $directoryLayout);
}
}