function filesize_formatted($path)

{

    $size = filesize($path);

    $units = array( 'B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB');

    $power = $size > 0 ? floor(log($size, 1024)) : 0;

    return number_format($size / pow(1024, $power), 2, '.', ',') . ' ' . $units[$power];

}