<?php

/**
 * @param string $identifier
 * @return array{
 *     upload_id: string,
 *     fieldname: string,
 *     filename: string,
 *     time_start: int,
 *     time_last: int,
 *     speed_average: int,
 *     speed_last: int,
 *     bytes_uploaded: int,
 *     bytes_total: int,
 *     files_uploaded: int,
 *     est_sec: int
 * }|null
 */
function uploadprogress_get_info(string $identifier): ?array {}