public static function activate() { global $wpdb; global $series_table_name; global $posts_series_table_name; $series_db = new Easy_Series_Db($wpdb, $series_table_name); if (!$series_db->has_table()) { $series_db->create_table(); } $posts_series_db = new Easy_Series_Posts_Db($wpdb, $posts_series_table_name); if (!$posts_series_db->has_table()) { $posts_series_db->create_table(); } }