FOF30\Download\Adapter\AbstractAdapter::getFileSize PHP Метод

Get the size of a remote file in bytes

public getFileSize ( string $url ) : integer
$url	string	The remote file's URL
Результат	integer	The file size, or -1 if the remote server doesn't support this feature

    public function getFileSize($url)
    {
        return -1;
    }

AbstractAdapter