Undefined Functions

Hi, I previously asked a question about getting undefined function errors in my script and someone mentioned that it may be that I am calling it from within an if or else statement. This turned out to be the case. Now the question - is there a way around this? What I need to do resolves around many different conditions, and depending on the what's what I call the necessary function. I have looked my script over and over and can not see any other way of doing this. I am fairly new to PHP and maybe there is a better way, and I'm open to suggestions. TIA Example: if ($a == $b) call function one; elseif ($a > $b) call function two; elseif ($a == $c) call function two; elseif ($a < $b) call function two; elseif ($c > $b) call function two; elseif ($d == $e) call function two;