Field Name prefix for Uploaded file

As part of a conference speakers registration form individuals are asked to upload multiple files (bio,photo, presentation, etc.) Because there are multiple speakers (around 40+) , and the potential of 3 or more uploaded files for each speaker, there re a lot of uploaded files to manage.
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To make organization easier, I have prefixed the uploaded file with the presenters name with this code:
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<?php
return $form->data['presenter_name'].'-'.date('Ymd').'_'.$file_name;
?>
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So the source (presenter) of the uploaded file is in the file name. So I have a file name which looks like: John Smith-20190324_JohnSmith.pdf
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I would like to also add the FieldName ( bio,photo, presentation, etc.) , so that the file name looks like: John Smith-bio--20190324_JohnSmith.pdf
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Any ideas?

I forgot to mention, this is Chronoforms v5

Hi drgolden,
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Can you not add that into the code you have?

<?php
return $form->data['presenter_name'].'-bio-'.date('Ymd').'_'.$file_name;
?>

Bob

There are 3 upload fields,.. 1) bio, 2) photo, and 3) presentation. I would like to use the name of each field to identify which "category" the file belongs to. Is it a bio, photo, or presentation? I can't always tell from the file extension.

Hi drgolden,
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The simplest way may be to use a separate Files Upload action for each of your File Fields - that way you can use the code I suggested.
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Otherwise you need to have some way to identify the file type and then use PHP to rename it after the Files Upload action.
​
Bob