If then statements.

[4x4 Mecca]

If this is in the wrong forum, I apologize in advance.

I was on a site ColoradoK5 you can see the hack here.(http://coloradok5.com/forums/showthread.php?t=200375). He has a hack he made that allows him to specify users to receive little icons on the bottom of their post bit.

I asked him how he did it, and he just told me he made some sort of if/then code where if userid = 123 then post the graphic.

Can someone here teach me how I would write something like that?

Thanks.