Using Gravity Forms ‘gform_dropbox_file_name’ PHP filter

The gform_dropbox_file_name is a Gravity Forms filter that allows you to override the filename before the file is uploaded to Dropbox.


To apply this filter to all forms:

add_filter('gform_dropbox_file_name', 'your_function_name', 10, 5);

To target a specific form, append the form ID to the hook name:

add_filter('gform_dropbox_file_name_10', 'your_function_name', 10, 5);


  • $file_name (string): The filename, including extension, e.g. screenshot.png.
  • $form (Form Object): The form currently being processed.
  • $field_id (string): The ID of the field currently being processed.
  • $entry (Entry Object): The entry currently being processed.
  • $feed (Feed Object): The feed currently being processed.

More information

See Gravity Forms Docs: gform_dropbox_file_name


Use an entry value in the filename

This example demonstrates how to use a value from the Entry Object when modifying the filename:

add_filter('gform_dropbox_file_name_10', 'change_name', 10, 5);
function change_name($file_name, $form, $field_id, $entry, $feed) {
    return rgar($entry, 'id') . '-' . $file_name;

Place this code in the functions.php file of your active theme.