How can one automatically rename files uploaded in a webform?

Question

I would like to rename the files uploaded to a webform according to some tokens or the value in some other field.

I did some research on this and was surprised to find no definite solution.

For example:

• https://www.drupal.org/node/326738 => A patch supplied for token support but the discussion ends without a final working patch
• https://www.drupal.org/node/364752 => Discussion on "Renaming file upload fields using other form fields". Discussion ends in "Won't Fix"
• Webform, creating customized directories for uploaded files => Approaches have been suggested here but no final solution given.

Answer 1

The sandbox project is removed as the issue queue get continued, the latest patch has been failed in simpletest, but you can still check this patch

Answer 2

You can change every file upload by hook_file_presave as your desire pattern as example

function yourmodulename_file_presave($file) {
  $parts = pathinfo($file->filename);
  $file->filename = 'mypattern_'.$file->uid .'_'. $file->timestamp . '.' . $parts['extension'];
}

but this method do not rename filname(it just rename file name in file_managed table), if you want also rename file name (uri of file) you should use below code

function yourmodulename_file_insert($file) {
  $parts = pathinfo($file->filename);
  $uri = 'public://'.'mypattern_'.$file->uid .'_'. $file->timestamp . '.' . $parts['extension'];
  $file=file_move($file, $uri);
}