exclude header if field is filled?

[QtrCafe]

Hello all,

its basically as it says .. I am trying to exclude the header and footer from showing up if a certain field is filled .. whats the best way to do this?

I am not a professional coder but I did have some experience in C++. I'm trying to make it this way but I have no clue why isn't it doing it right

PHP Code:

<if condition!="$userinfo[field8]">
$header
</if> 


a little help will be really appreciated