Merge Tag modifier to output file upload links with filenames

gk_file_upload_modifier.php

<?php // DO NOT COPY THIS LINE

add_filter( 'gform_secure_file_download_location', '__return_false' );

add_filter( 'gform_merge_tag_filter', function ( $value, $merge_tag, $modifier, $field, $raw_value ) {

	if ( 'all_fields' !== $merge_tag && 'linker' === $modifier ) {

		// Split on <br> tags, line breaks, or commas
		$files = preg_split('/<br\s*\/?>|\r\n|\r|\n|,/', trim($value));

		$output = '';

		foreach ( $files as $file_url ) {
			$file_url = trim($file_url);
			if( empty($file_url) ) {
				continue;
			}
			$file_name = basename($file_url);
			$output .= '<a href="'.$file_url.'" target="_blank">'.$file_name.'</a><br>';
		}

		// Remove trailing <br> if desired
		$output = rtrim($output, '<br>');

		return $output;
	}

	return $value;
}, 10, 5 );