Downloading: 0B'); } $filepath = reset($files); $filesize = (int) filesize($filepath); $filesizetypes = array('B', 'KB', 'MB', 'GB', 'TB'); $filesizetype = 'B'; while ($filesize > 1000) { $filesize = round($filesize / 1000, 2); $act = array_search($filesizetype, $filesizetypes); $filesizetype = $filesizetypes[($act + 1)]; } die((string) 'Downloading: '.$filesize.$filesizetype.'');