php tag???

I thought I had solved my problem, but it doesn'twork in Safari.
I have a php tag in my content block.

<div id="Content">
<?php @ require_once ("include.php"); ?>
</div>

In Safari the browser puts a space between the content
and the menu, and I can't figure out why. If I change it to a class:

<div class="Content">
<?php @ require_once ("include.php"); ?>
</div>

It works in Safari, but not in any other browser!

Is there another way to do this?

thanks