[thelist] PHP template code security sufficient?

[P Chen]

I was reading an old tutorial on A List Apart regarding building a PHP
template based site using the following code to insert page-specific
content, but wasn't sure if this was sufficient in terms of security. I
don't know much about php security, so I'm hoping someone can shed light on
this piece of code, what it's vulnerable to, etc...

http://alistapart.com/articles/phpcms/

<div class="body">
<?php @ require_once ("$page.html"); ?>
</div>

Thanks,
Peter