[@zaerl Participant 14 years, 5 months ago]

Always wrap PHP code inside script tags

<script language="PHP">echo phpversion()</script>

also remember to make the change explained here: https://bbpress.org/forums/topic/admin-can-paste-php-code-in-post?replies=28#post-71965

Can you please explain what do you mean about production environment?

A public site. The code isn’t tested at all.