Filtering and stripping comment data...

[cgm225]

I am creating a class used to process comments posted by users on a blog page.  I set the variable values as follows, and I want to know if there are any other things I should be doing to check the user supplied data for badness...

 

        //Checks for, filters, and strips post data
        $this->name = !empty($_POST['name']) ? strip_tags($_POST['name']) : null;
        $this->email = (isset($_POST['email']) AND filter_var($_POST['email'], FILTER_VALIDATE_EMAIL)) ? $_POST['email'] : null;
        $this->url = (isset($_POST['url']) AND filter_var($_POST['url'], FILTER_VALIDATE_URL)) ? $_POST['url'] : null;
        $this->comment = !empty($_POST['comment']) ? strip_tags($_POST['comment']) : null;
        $this->ip = $_SERVER['REMOTE_ADDR'];