Code-Snippets-Functions/Execute a function on a child site/Gravity Forms/custom-merge-tab-download.txt

add_filter('gform_custom_merge_tags', 'custom_merge_tags', 10, 4);
function custom_merge_tags( $merge_tags, $form_id, $fields, $element_id ) {
    $merge_tags[] = array('label' => 'Download Link', 'tag' => '{download_link}');
    return $merge_tags;
}