I need the source to flag.php

I am using the Country Flag API flag.php.
When an IP address is not known, I am redirected to an image called xx.gif which is a question mark.
I do not want to display a "?" if a flag is not known. The flag.php source code will tell me what I need to know.
Thanks,
Mike
When an IP address is not known, I am redirected to an image called xx.gif which is a question mark.
I do not want to display a "?" if a flag is not known. The flag.php source code will tell me what I need to know.
Thanks,
Mike