[kh99]

No, it has to be html. But you could probably render a template, like:

PHP Code:

if (is_member_of($vbulletin->userinfo, 1, 2, 3, 4)) 
{ 
    static $code_replacement = '';
    if (empty($code_replacement))
    {
        $templater = vB_Template::create('code_replacement');
        $code_replacement = $templater->render();
        unset($templater);
    }
    $post['message'] = preg_replace('#<!-- code -->.*?<!-- end code -->#s', $code_replacement, $post['message']); 
} 


That doesn't let you use bbcode, but it's a little more convenient. I suppose you could run the replacement text through the bbcode parser if you wanted, but it really doesn't let you do anything you couldn't do by inserting html.