"Leider kannst du nur alle 15 Sekunden einen neuen Kommentar eingeben..."

function wp_allow_comment($commentdata) {
    global $wpdb;
    extract($commentdata);


    $comment_user_domain = apply_filters('pre_comment_user_domain', gethostbyaddr($comment_author_IP) );


    // Simple duplicate check
    $dupe = "SELECT comment_ID FROM $wpdb->comments WHERE comment_post_ID = '$comment_post_ID' AND ( comment_author = '$comment_author' ";
    if ( $comment_author_email )
        $dupe .= "OR comment_author_email = '$comment_author_email' ";
    $dupe .= ") AND comment_content = '$comment_content' LIMIT 1";
    if ( $wpdb->get_var($dupe) )
        die( __('Duplicate comment detected; it looks as though you\'ve already said that!') );


    // Simple flood-protection
    if ( $lasttime = $wpdb->get_var("SELECT comment_date_gmt FROM $wpdb->comments WHERE comment_author_IP = '$comment_author_IP' OR comment_author_email = '$comment_author_email' ORDER BY comment_date DESC LIMIT 1") ) {
        $time_lastcomment = mysql2date('U', $lasttime);
        $time_newcomment  = mysql2date('U', $comment_date_gmt);
        if ( ($time_newcomment - $time_lastcomment) < 15 ) {
            do_action('comment_flood_trigger', $time_lastcomment, $time_newcomment);
            die( __('Sorry, you can only post a new comment once every 15 seconds. Slow down cowboy.') );
        }
    }