public static function init() { add_filter('theme_options_save', __CLASS__ . '::options_save'); add_filter('theme_options_default', __CLASS__ . '::options_default'); add_action('base_settings', __CLASS__ . '::display_backend'); if (theme_functions::$thumbnail_placeholder !== self::get_options('thumbnail')) { theme_functions::$thumbnail_placeholder = self::get_options('thumbnail'); } if (theme_functions::$avatar_placeholder !== self::get_options('avatar')) { theme_functions::$avatar_placeholder = self::get_options('avatar'); } }