Need hel pwith an IF

[MarkFoster]

I'm using this:

<if condition="$forumid == 176"><span style="color:red"><b>Note: Spamming in this forum is not permitted! Breaking this rule will result in a two day ban.</b></span></if>

But it gets shown on the "New Posts/Today's Posts" page as well. How can I create a code that would go something like:

<if condition="file == search.php"><then == Do not show something></then></if>

^ That's just an example, I know nothing about coding.