title = isset($title) ? $title : '提示';
$content = isset($content) ? $content : '';
$class = isset($class) ? $class : 'info';
$class = in_array($class, ['danger', 'warning', 'success', 'info']) ? $class : 'info';
$buttons = isset($buttons) ? $buttons : [['title' => '好的，我知道了', 'class' => 'primary', 'url' => FALSE]];
?>