eventespresso / event-espresso-core

        // load the widget class file

        require_once($widget_path . '/' . $widget_class . $widget_ext);

        // verify that class exists

        if (! class_exists($widget_class)) {

            $msg = sprintf(__('The requested %s widget class does not exist.', 'event_espresso'), $widget_class);

            EE_Error::add_error($msg . '||' . $msg, __FILE__, __FUNCTION__, __LINE__);

            return;

        }

        register_widget($widget_class);

        // add to array of registered widgets

        EE_Registry::instance()->widgets->{$widget_class} = $widget_path . '/' . $widget_class . $widget_ext;

                                // default setup for it.

                                // @link https://events.codebasehq.com/projects/event-espresso/tickets/9465

                                $updated = $MTP->insert($message_template_fields);

                                if (! $updated || is_wp_error($updated)) {

                                    EE_Error::add_error(

                                        sprintf(

                                            esc_html__('%s field could not be updated.', 'event_espresso'),

                                            $template_field

                                        ),

                                        __FILE__,

                                        __FUNCTION__,

                                        __LINE__

                                    );

                                    $success = 0;

                                } else {

                                    $success = 1;

                                }

                            }

                        }

                        $action_desc = 'updated';

            return $critical_page;

        }

        // get newly created post's details

        if (! $critical_page['post'] = get_post($post_id)) {

            $msg = sprintf(

                __('The Event Espresso critical page entitled "%s" could not be retrieved.', 'event_espresso'),

                $critical_page['name']

            );

            EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);

        }

        return $critical_page;

    }