plugin_name = $plugin['Name']; $this->version = $plugin['Version']; spl_autoload_register( array( $this, 'autoload_class' ), true, false ); // Start hooks. $this->setup_hooks(); // Init the bulk actions. new Bulk_Actions( $this ); } /** * Setup and register WordPress hooks. */ protected function setup_hooks() { // Load plugin text domain add_action( 'init', array( $this, 'load_text_domain' ) ); add_action( 'init', array( $this, 'plugin_groups_init' ), PHP_INT_MAX ); // Always the last thing to init. add_action( 'admin_init', array( $this, 'admin_init' ) ); add_action( 'admin_menu', array( $this, 'admin_menu' ) ); add_action( 'network_admin_menu', array( $this, 'admin_menu' ) ); add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_assets' ) ); add_action( 'rest_api_init', array( $this, 'register_routes' ) ); add_filter( 'views_plugins', array( $this, 'add_groups' ), PHP_INT_MAX ); add_filter( 'views_plugins-network', array( $this, 'add_groups' ), PHP_INT_MAX ); add_filter( 'all_plugins', array( $this, 'catch_selected_group' ) ); add_filter( 'show_advanced_plugins', array( $this, 'filter_shown_status' ), 10, 2 ); add_filter( 'site_transient_update_plugins', array( $this, 'alter_update_plugins' ) ); add_action( 'pre_current_active_plugins', array( $this, 'render_group_navigation' ) ); add_filter( 'bulk_actions-plugins', array( $this, 'bulk_actions' ) ); add_action( 'admin_bar_menu', array( $this, 'admin_bar_item' ), 100 ); add_filter( 'self_admin_url', array( $this, 'append_group_to_self' ), 10, 3 ); add_filter( 'plugin_action_links', array( $this, 'append_group_to_actions' ) ); } /** * Append the current group id to plugin action links to maintain selection on activation and deactivation of plugins. * * @param array $actions Array of action links. * * @return array */ public function append_group_to_actions( $actions ) { if ( isset( $this->current_group ) ) { foreach ( $actions as &$tag ) { $parts = shortcode_parse_atts( $tag ); if ( isset( $parts['href'] ) ) { $url = html_entity_decode( $parts['href'] ); $url = add_query_arg( self::$slug, $this->current_group, $url ); $tag = str_replace( $parts['href'], htmlentities( $url ), $tag ); } } } return $actions; } /** * Append the group to redirect URLS after activation and deactivation of plugins. * * @param string $url The url to append to. * @param string $path The path location. * * @return string */ public function append_group_to_self( $url, $path ) { if ( 'plugins.php' === wp_parse_url( $path, PHP_URL_PATH ) ) { if ( ! isset( $this->current_group ) ) { // Init the current group if not set yet. $this->catch_selected_group(); } // If we found a group, then append it to the self URL on the plugins page to maintain groups in nav. if ( isset( $this->current_group ) ) { $url = add_query_arg( self::$slug, $this->current_group, $url ); } } return $url; } /** * Load the plugin text domain for translation. */ public function load_text_domain() { load_plugin_textdomain( self::$slug, false, basename( PLGGRP_PATH ) . '/languages' ); } /** * Remove plugins from the update available. * * @param object $data The data object. * * @return object */ public function alter_update_plugins( $data ) { if ( $this->current_group ) { $keys = array_keys( $this->groups[ $this->current_group ] ); foreach ( $data->response as $key => $plugin ) { if ( ! in_array( $key, $keys, true ) ) { unset( $data->response[ $key ] ); } } } return $data; } /** * Remove status that are not relevant. * * @param bool $show Flag to show. * @param string $status The current status * * @return bool */ public function filter_shown_status( $show, $status ) { global $plugins; static $removes = array( 'mustuse', 'dropins', ); if ( $this->current_group && in_array( $status, $removes, true ) ) { $show = false; } if ( true === $this->config['params']['legacyGrouping'] ) { $plugins += $this->groups; } return $show; } /** * Render the Group navigation. */ public function render_group_navigation() { // Use new group system. if ( true !== $this->config['params']['legacyGrouping'] && 'groups-dropdown' !== $this->config['params']['navStyle'] ) { $parts = array(); $parts[] = $this->make_all_tag(); foreach ( $this->groups as $key => $plugins ) { $parts[] = $this->make_group_tag( $key ); } $groups = implode( "", $parts ); $group_set = Utils::build_tag( 'ul', array( 'class' => array( $this->config['params']['navStyle'] ) ), $groups ); $html = Utils::build_tag( 'div', array( 'class' => self::$slug ), $group_set ); if ( 1 < count( $parts ) ) { echo wp_kses( $html, wp_kses_allowed_html( 'post' ) ); } } } /** * Add dropdown navigation on bulk actions. * * @param array $actions Unchanged actions. * * @return array */ public function bulk_actions( $actions ) { if ( true !== $this->config['params']['legacyGrouping'] && 'groups-dropdown' === $this->config['params']['navStyle'] ) { $this->dropdown_navigation(); } return $actions; } /** * Render a dropdown navigation. * * @param bool $echo Optional flag to echo the field or return the string. * * @return void|string */ public function dropdown_navigation( $echo = true ) { $html = array(); $html[] = ''; $html[] = '\n"; $html = implode( $html ); if ( false === $echo ) { return $html; } echo $html; } /** * Catch the selected group. * * @param array $plugins List of plugins. * * @return array */ public function catch_selected_group( $plugins = array() ) { global $status; $this->current_status = $status; $selected_group = filter_input( INPUT_GET, self::$slug, FILTER_SANITIZE_STRING ); if ( $selected_group && isset( $this->groups[ $selected_group ] ) ) { $this->current_group = $selected_group; if ( ! empty( $plugins ) ) { $plugins = $this->groups[ $selected_group ]; // Add selection path. $this->current_nav_path .= ' | ' . $this->config['groups'][ $selected_group ]['name']; } } // Add our styles if we have groups; if ( ! empty( $this->groups ) ) { wp_enqueue_style( self::$slug . '-navbar' ); } return $plugins; } /** * Get a url link for group navigation. * * @param null|string $id The group ID or null for all. * * @return string */ protected function get_nav_url( $id = null ) { $url = filter_input( INPUT_SERVER, 'REQUEST_URI', FILTER_SANITIZE_URL ); if ( ! $url || false === strpos( 'plugins.php', $url ) ) { // Just in case. $url = self_admin_url( 'plugins.php' ); } if ( null === $id ) { // Null id is for the 'All groups'. return remove_query_arg( self::$slug, $url ); } // If no plugins get a link back to admin. if ( empty( $this->groups[ $id ] ) ) { return add_query_arg( 'page', self::$slug, $url ); } return add_query_arg( array( 'plugin_status' => $this->current_status, self::$slug => $id, ), $url ); } /** * Get the current group. * * @return array|null */ public function get_current_group() { if ( ! isset( $this->current_group ) ) { $this->catch_selected_group(); } return $this->current_group ? $this->config['groups'][ $this->current_group ] : null; } /** * Get the groups. * * @return array */ public function get_groups() { return array_values( $this->config['groups'] ); } /** * Make a group tag. * * @param string $id The Group ID. * * @return string */ protected function make_group_tag( $id ) { $group = $this->config['groups'][ $id ]; $total = count( $this->groups[ $id ] ); $counter = ''; if ( ! empty( $total ) ) { $counter = Utils::build_tag( 'span', array( 'class' => 'count' ), " ({$total})" ); } $li_atts = array( 'class' => array( 'group-link', $group['id'], ), ); $link_atts = array( 'href' => $this->get_nav_url( $id ), ); if ( $group['id'] === $this->current_group ) { $li_atts['class'][] = 'current'; $link_atts['class'] = 'current'; $link_atts['aria-current'] = 'page'; } $link = Utils::build_tag( 'a', $link_atts, $group['name'] . $counter ); return Utils::build_tag( 'li', $li_atts, $link ); } /** * Load presets into groups for built-in and filtered presets. * * @return array */ protected function load_presets() { $groups = array( 'WooCommerce' => array( 'WooCommerce' ), 'Easy Digital Downloads' => array( 'Easy Digital Downloads' ), 'Ninja Forms' => array( 'Ninja Forms' ), 'Gravity Forms' => array( 'Gravity Forms' ), 'WPForms' => array( 'WPForms' ), 'E-Commerce' => array( 'WooCommerce', 'Easy Digital Downloads', ), 'Forms' => array( 'Ninja Forms', 'Gravity Forms', 'WPForms', 'Formidable Forms', ), 'SEO' => array( 'All in One SEO', 'Yoast SEO', ), // @todo: Add more categories for presets. ); /** * Filter the presets (legacy) * * @deprecated 2.0.0 */ $groups = apply_filters( 'plugin-groups-get-presets', $groups ); /** * Filter preset plugin groups. * * @hook get_preset_plugin_groups * @since 2.0.0 * * @param $groups {array} The preset groups. * * @return array */ $presets = apply_filters( 'get_preset_plugin_groups', $groups ); $preset_groups = array(); foreach ( $presets as $name => $keywords ) { $id = sanitize_title( $name ); $preset_groups[ $id ] = array( 'id' => $id, 'name' => $name, 'plugins' => array(), 'keywords' => $keywords, ); } return array( 'preset_groups' => $preset_groups, 'presets' => array_keys( $groups ), ); } /** * Make all link tag. * * @return string */ protected function make_all_tag() { $link_atts = array( 'href' => $this->get_nav_url(), ); if ( empty( $this->current_group ) ) { $link_atts['class'] = 'current'; $link_atts['aria-current'] = 'page'; } $link = Utils::build_tag( 'a', $link_atts, __( 'All Groups', self::$slug ) ); return Utils::build_tag( 'li', array( 'class' => array( 'group-link', '__allgroups' ) ), $link ); } /** * Add new filter view * * @param array $views The list of nav tags for plugin statuses. * * @return array */ public function add_groups( $views ) { foreach ( $views as &$tag ) { if ( preg_match( '/]*?)>{1}/', $tag, $found ) ) { $atts = Utils::get_tag_attributes( $found[1] ); $url = add_query_arg( self::$slug, $this->current_group, $atts['href'] ); $tag = str_replace( $atts['href'], $url, $tag ); wp_parse_str( wp_parse_url( $atts['href'], PHP_URL_QUERY ), $query ); if ( isset( $query['plugin_status'] ) && $query['plugin_status'] === $this->current_status ) { $names = explode( ' ', wp_kses( $tag, array() ) ); array_pop( $names ); $this->current_nav_path .= ' | ' . implode( ' ', $names ); } } } // Legacy. if ( true === $this->config['params']['legacyGrouping'] ) { foreach ( $this->groups as $key => $plugins ) { $views[ $key ] = $this->make_group_tag( $key ); } } // @todo: Make method. if ( ! empty( $this->current_nav_path ) ) { $append = array( 'name' => $this->current_nav_path, ); wp_add_inline_script( 'wp-util', 'var appendHead = ' . wp_json_encode( $append ) . '; var pluginsHead = document.getElementsByClassName(\'wp-heading-inline\' );if( pluginsHead.length ) {pluginsHead[0].innerText += appendHead.name}' ); } return $views; } /** * Register REST Endpoint for saving config. */ public function register_routes() { register_rest_route( self::$slug, 'save', array( 'methods' => \WP_REST_Server::CREATABLE, 'args' => array(), 'callback' => array( $this, 'rest_save_config' ), 'permission_callback' => function( \WP_REST_Request $request ) { if ( is_multisite() ) { $data = $request->get_json_params(); $can = current_user_can_for_blog( $data['siteID'], 'manage_options' ); } else { $can = current_user_can( 'manage_options' ); } return $can; }, ) ); register_rest_route( self::$slug, 'load', array( 'methods' => \WP_REST_Server::READABLE, 'args' => array(), 'callback' => array( $this, 'rest_load_config' ), 'permission_callback' => function( \WP_REST_Request $request ) { $id = $request->get_param( 'siteID' ); return current_user_can_for_blog( $id, 'manage_options' ); }, ) ); } /** * Load a config for a specific site. * * @param \WP_REST_Request $request * * @return \WP_Error|\WP_HTTP_Response|\WP_REST_Response */ public function rest_load_config( \WP_REST_Request $request ) { $id = $request->get_param( 'siteID' ); $json = $this->build_config_object( $id ); return rest_ensure_response( json_decode( $json ) ); } /** * Save endpoint. * * @param \WP_REST_Request $request The request. * * @return \WP_Error|\WP_HTTP_Response|\WP_REST_Response */ public function rest_save_config( \WP_REST_Request $request ) { $data = $request->get_json_params(); $site_id = get_current_blog_id(); if ( is_multisite() ) { if ( ! empty( $data['siteID'] ) ) { $site_id = $data['siteID']; unset( $data['siteID'] ); } if ( ! empty( $data['sitesEnabled'] ) ) { // Ensure we have the same types. $data['sitesEnabled'] = array_map( 'intval', $data['sitesEnabled'] ); } } $this->config = wp_parse_args( $data, $this->config ); $success = $this->save_config( $site_id ); return rest_ensure_response( array( 'success' => $success ) ); } /** * Save the current config. * * @param null|int $site_id The site ID to save for. * * @return bool */ protected function save_config( $site_id = null ) { if ( is_multisite() ) { if ( null === $site_id ) { $site_id = get_current_blog_id(); } $success = update_network_option( $site_id, self::CONFIG_KEY, $this->config ); } else { $success = update_option( self::CONFIG_KEY, $this->config ); } return $success; } /** * Autoloader by Locating and finding classes via folder structure. * * @param string $class class name to be checked and autoloaded. */ function autoload_class( $class ) { $class_location = self::locate_class_file( $class ); if ( $class_location ) { include_once $class_location; } } /** * Locates the path to a requested class name. * * @param string $class The class name to locate. * * @return string|null */ static public function locate_class_file( $class ) { $return = null; $parts = explode( '\\', strtolower( str_replace( '_', '-', $class ) ) ); $core = array_shift( $parts ); $self = strtolower( str_replace( '_', '-', __CLASS__ ) ); if ( $core === self::$slug ) { $name = 'class-' . strtolower( array_pop( $parts ) ) . '.php'; $parts[] = $name; $path = PLGGRP_PATH . 'classes/' . implode( '/', $parts ); if ( file_exists( $path ) ) { $return = $path; } } return $return; } /** * Get the plugin version */ public function version() { return $this->version; } /** * Check plugin_groups version to allow 3rd party implementations to update or upgrade. */ protected function check_version() { $previous_version = get_option( self::VERSION_KEY, 0.0 ); $new_version = $this->version(); if ( version_compare( $previous_version, $new_version, '<' ) ) { if ( version_compare( $previous_version, '2.0.0', '<' ) ) { $data = get_option( 'plugin_groups_plugin_groups', array() ); if ( ! empty( $data ) ) { $new_config = $this->convert_legacy_groups( $data ); update_option( self::CONFIG_KEY, $new_config ); } } // Allow for updating. do_action( "_plugin_groups_version_upgrade", $previous_version, $new_version ); // Update version. update_option( self::VERSION_KEY, $new_version, true ); } } /** * Convert legacy configs. * * @param array $data Array of previous version config. * * @return array */ protected function convert_legacy_groups( $data ) { $groups = array(); foreach ( $data['group'] as $group ) { $keywords = explode( "\n", $group['config']['keywords'] ); $new_group = array( 'id' => $group['_id'], 'name' => $group['config']['group_name'], 'plugins' => isset( $group['config']['plugins'] ) ? $group['config']['plugins'] : array(), 'keywords' => array_filter( $keywords ), ); $groups[ $group['_id'] ] = $new_group; } // Set up the new config. $config = $this->get_default_config(); $config['groups'] = $groups; $config['selectedPresets'] = isset( $data['presets'] ) ? $data['presets'] : array(); $config['params']['legacyGrouping'] = true; $config['params']['navStyle'] = 'subsubsub'; return $config; } /** * Initialise plugin_groups. */ public function plugin_groups_init() { // Check version. $this->check_version(); // Load config. $this->set_config(); /** * Init the settings system * * @param Plugin_Groups ${slug} The core object. */ do_action( 'plugin_groups_init' ); } /** * Hook into admin_init. */ public function admin_init() { if ( ! empty( $_POST['plugin-group-config'] ) ) { $data = stripslashes( $_POST['plugin-group-config'] ); $data = json_decode( $data, true ); update_option( Plugin_Groups::CONFIG_KEY, $data ); wp_safe_redirect( admin_url( 'plugins.php?page=plugin-groups' ) ); } $asset = include PLGGRP_PATH . 'js/' . self::$slug . '.asset.php'; wp_register_script( self::$slug, PLGGRP_URL . 'js/' . self::$slug . '.js', $asset['dependencies'], $asset['version'], true ); wp_register_style( self::$slug, PLGGRP_URL . 'css/' . self::$slug . '.css', array(), $asset['version'] ); wp_register_style( self::$slug . '-navbar', PLGGRP_URL . 'css/' . self::$slug . '-navbar.css', array(), $asset['version'] ); } /** * Hook into the admin_menu. */ public function admin_menu() { if ( ! $this->network_active() || $this->site_enabled() || is_main_site() ) { add_submenu_page( 'plugins.php', __( 'Plugin Groups', self::$slug ), __( 'Plugin Groups', self::$slug ), 'manage_options', 'plugin-groups', array( $this, 'render_admin' ), 50 ); } } /** * Check if the plugin is network activated. * * @return bool */ protected function network_active() { return is_plugin_active_for_network( PLGGRP_SLUG ); } /** * Check to see if the site is allowed to use this. * * @return bool */ protected function site_enabled() { $site_id = get_current_blog_id(); $main_config = get_network_option( get_main_site_id(), self::CONFIG_KEY, $this->get_default_config() ); return in_array( $site_id, $main_config['sitesEnabled'], true ); } /** * Add Groups to the admin bar. * * @param WP_Admin_Bar $admin_bar */ public function admin_bar_item( $admin_bar ) { if ( ! $this->config['params']['menuGroups'] || ! current_user_can( 'activate_plugins' ) ) { return; } $groups = array( 'parent' => array( 'id' => self::$slug, 'title' => $this->plugin_name, 'href' => $this->get_nav_url( 'dashboard' ), 'meta' => array( 'title' => $this->plugin_name, ), ), ); foreach ( $this->groups as $key => $plugins ) { $group = $this->config['groups'][ $key ]; $groups[ $key ] = array( 'id' => $key, 'parent' => self::$slug, 'title' => $group['name'] . ' (' . count( $plugins ) . ')', 'href' => $this->get_nav_url( $key ), ); } foreach ( $groups as $option ) { $admin_bar->add_menu( $option ); } } /** * Enqueue assets where needed. */ public function enqueue_assets() { $page = filter_input( INPUT_GET, 'page', FILTER_SANITIZE_STRING ); if ( $page && self::$slug === $page ) { wp_enqueue_script( self::$slug ); wp_enqueue_style( self::$slug ); $this->prep_config(); } } /** * Prepare the config data for output to the admin UI. */ protected function prep_config() { $data = $this->build_config_object(); // Add config data. wp_add_inline_script( self::$slug, 'var plgData = ' . $data, 'before' ); } /** * Build the json config object. * * @param int|null $site_id The site to get config for, ir null for current. * * @return string */ protected function build_config_object( $site_id = null ) { if ( null === $site_id ) { $data = $this->config; } else { $data = $this->load_config( $site_id ); } // Prep config data. $data['saveURL'] = rest_url( self::$slug . '/save' ); $data['legacyURL'] = add_query_arg( 'reactivate-legacy', true, $this->get_nav_url( 'dashboard' ) ); $data['restNonce'] = wp_create_nonce( 'wp_rest' ); // Multisite. if ( $this->network_active() && ( is_network_admin() || defined( 'REST_REQUEST' ) && true === REST_REQUEST ) ) { $data['loadURL'] = rest_url( self::$slug . '/load' ); $data['sites'] = get_sites(); $data['mainSite'] = get_main_site_id(); if ( ! in_array( $data['mainSite'], $data['sitesEnabled'], true ) ) { $data['sitesEnabled'][] = get_main_site_id(); } } // Add plugins. $data['plugins'] = get_plugins(); // Remove presets from groups for admin. $data['groups'] = array_diff_key( $data['groups'], $data['preset_groups'] ); return wp_json_encode( $data ); } /** * Get the default config. * * @return array */ protected function get_default_config() { return array( 'groups' => array(), 'selectedPresets' => array(), 'params' => array( 'legacyGrouping' => false, 'navStyle' => 'subsubsub', 'menuGroups' => false, ), 'sitesEnabled' => array(), // Used for multisite. ); } /** * Load the UI config. * * @param int|null $site_id The site ID to load. Null for current site. * * @return array; */ protected function load_config( $site_id = null ) { // Load the config. if ( is_multisite() ) { if ( ! $site_id ) { $site_id = get_current_blog_id(); } $config = get_network_option( $site_id, self::CONFIG_KEY, $this->get_default_config() ); $config['siteID'] = (int) $site_id; } else { $config = get_option( self::CONFIG_KEY, $this->get_default_config() ); } $config['pluginName'] = $this->plugin_name; $config['version'] = $this->version; $config['slug'] = self::$slug; // Load the presets. $config += $this->load_presets(); return $config; } /** * Set the config. * * @param int|null $site_id The site ID to load. Null for current site. */ protected function set_config( $site_id = null ) { $this->config = $this->load_config( $site_id ); // Populate groups with plugins. array_map( array( $this, 'populate_plugins' ), $this->config['groups'] ); // register selected presets. if ( ! empty( $this->config['selectedPresets'] ) ) { array_map( array( $this, 'register_preset' ), $this->config['selectedPresets'] ); } } /** * Register a preset. * * @param string $preset The preset name to register. */ protected function register_preset( $preset ) { $key = sanitize_title( $preset ); if ( isset( $this->config['preset_groups'][ $key ] ) ) { $this->config['groups'][ $key ] = $this->config['preset_groups'][ $key ]; } } /** * Populate a group with selected plugins. * * @param array $group The group array. */ protected function populate_plugins( $group ) { static $plugins; if ( ! $plugins ) { $plugins = get_plugins(); } foreach ( $group['plugins'] as $plugin ) { if ( isset( $plugins[ $plugin ] ) ) { $this->groups[ $group['id'] ][ $plugin ] = $plugins[ $plugin ]; } } // Populate keywords now to keep ordering. $this->populate_keywords( $group['id'] ); } /** * Populate a group from keywords. * * @param string $id The group ID. */ protected function populate_keywords( $id ) { if ( ! isset( $this->config['groups'][ $id ] ) || empty( $this->config['groups'][ $id ]['keywords'] ) ) { return; } $keywords = array_map( 'strtolower', $this->config['groups'][ $id ]['keywords'] ); $plugins = get_plugins(); foreach ( $plugins as $plugin_key => $plugin_data ) { if ( isset( $this->groups[ $id ][ $plugin_key ] ) ) { continue; } $plugin_string = strtolower( implode( ' ', $plugin_data ) ); $matched = array_filter( $keywords, function( $keyword ) use ( $plugin_string ) { return false !== strpos( $plugin_string, $keyword ); } ); if ( ! empty( $matched ) ) { $this->groups[ $id ][ $plugin_key ] = $plugin_data; } } } /** * Create a new Group. * * @param string $name The group name to create. * @param array $plugin_slugs Plugin slug or list of slugs to add to the group. * * @return string|bool */ public function create_group( $name, array $plugin_slugs = array() ) { $success = false; $new_id = Utils::generate_id(); $group = array( 'id' => $new_id, 'keywords' => array(), 'name' => trim( $name ), 'open' => false, 'plugins' => $plugin_slugs, ); $this->config['groups'][ $new_id ] = $group; if ( $this->save_config() ) { $success = $new_id; } return $success; } /** * Add plugins to a group. * * @param string $group_id The group ID to add plugin to. * @param array $plugin_slugs Plugin slug or list of slugs to add to the group. * * @return bool */ public function add_to_group( $group_id, array $plugin_slugs ) { $success = false; if ( isset( $this->config['groups'][ $group_id ] ) ) { $new_plugins = array_merge( $this->config['groups'][ $group_id ]['plugins'], $plugin_slugs ); $this->config['groups'][ $group_id ]['plugins'] = array_unique( $new_plugins ); $success = $this->save_config(); } return $success; } /** * Remove Plugins from a group. * * @param string $group_id The group ID to add plugin to. * @param array $plugin_slugs Plugin slug or list of slugs to add to the group. * * @return bool */ public function remove_from_group( $group_id, array $plugin_slugs ) { $success = false; if ( isset( $this->config['groups'][ $group_id ] ) ) { $this->config['groups'][ $group_id ]['plugins'] = array_diff( $this->config['groups'][ $group_id ]['plugins'], $plugin_slugs ); $success = $this->save_config(); } return $success; } /** * Render the admin page. */ public function render_admin() { include PLGGRP_PATH . 'includes/main.php'; } /** * Get the instance of the class. * * @return Plugin_Groups */ public static function get_instance() { if ( is_null( self::$instance ) ) { self::$instance = new self(); } return self::$instance; } }