Habari\HTMLNode::add_class PHP Метод

    function add_class($newclass)
    {
        $class = $this->class;
        $classes = preg_split('#\\s+#', $class);
        $newclass = is_array($newclass) ? $newclass : preg_split('#\\s+#', $newclass);
        $classes = array_merge($classes, $newclass);
        $classes = array_unique($classes);
        $this->class = trim(implode(' ', $classes));
    }