Method getMultipleUploadSizeFormat

public static function getMultipleUploadSizeFormat($size)
{
    $readableSize = PhocaDownloadFile::getFileSizeReadable($size, '%01.0f %s', 1);
    $readableSize = str_replace(' ', '', $readableSize);
    $readableSize = strtolower($readableSize);
    return $readableSize;
}