<?php /** * Core Widgets API * * This API is used for creating dynamic sidebar without hardcoding functionality into * themes * * Includes both internal WordPress routines and theme-use routines. * * This functionality was found in a plugin before the WordPress 2.2 release, which * included it in the core from that point on. * * @link https://wordpress.org/support/article/wordpress-widgets/ * @link https://developer.wordpress.org/themes/functionality/widgets/ * * @package WordPress * @subpackage Widgets * @since 2.2.0 */ // // Global Variables. // /** @ignore */ global $wp_registered_sidebars, $wp_registered_widgets, $wp_registered_widget_controls, $wp_registered_widget_updates; /** * Stores the sidebars, since many themes can have more than one. * * @global array $wp_registered_sidebars Registered sidebars. * @since 2.2.0 */ $wp_registered_sidebars = array(); /** * Stores the registered widgets. * * @global array $wp_registered_widgets * @since 2.2.0 */ $wp_registered_widgets = array(); /** * Stores the registered widget controls (options). * * @global array $wp_registered_widget_controls * @since 2.2.0 */ $wp_registered_widget_controls = array(); /** * @global array $wp_registered_widget_updates */ $wp_registered_widget_updates = array(); /** * Private * * @global array $_wp_sidebars_widgets */ $_wp_sidebars_widgets = array(); /** * Private * * @global array $_wp_deprecated_widgets_callbacks */ $GLOBALS['_wp_deprecated_widgets_callbacks'] = array( 'wp_widget_pages', 'wp_widget_pages_control', 'wp_widget_calendar', 'wp_widget_calendar_control', 'wp_widget_archives', 'wp_widget_archives_control', 'wp_widget_links', 'wp_widget_meta', 'wp_widget_meta_control', 'wp_widget_search', 'wp_widget_recent_entries', 'wp_widget_recent_entries_control', 'wp_widget_tag_cloud', 'wp_widget_tag_cloud_control', 'wp_widget_categories', 'wp_widget_categories_control', 'wp_widget_text', 'wp_widget_text_control', 'wp_widget_rss', 'wp_widget_rss_control', 'wp_widget_recent_comments', 'wp_widget_recent_comments_control', ); // // Template tags & API functions. // /** * Register a widget * * Registers a WP_Widget widget * * @since 2.8.0 * @since 4.6.0 Updated the `$widget` parameter to also accept a WP_Widget instance object * instead of simply a `WP_Widget` subclass name. * * @see WP_Widget * * @global WP_Widget_Factory $wp_widget_factory * * @param string|WP_Widget $widget Either the name of a `WP_Widget` subclass or an instance of a `WP_Widget` subclass. */ function register_widget( $widget ) { global $wp_widget_factory; $wp_widget_factory->register( $widget ); } /** * Unregisters a widget. * * Unregisters a WP_Widget widget. Useful for un-registering default widgets. * Run within a function hooked to the {@see 'widgets_init'} action. * * @since 2.8.0 * @since 4.6.0 Updated the `$widget` parameter to also accept a WP_Widget instance object * instead of simply a `WP_Widget` subclass name. * * @see WP_Widget * * @global WP_Widget_Factory $wp_widget_factory * * @param string|WP_Widget $widget Either the name of a `WP_Widget` subclass or an instance of a `WP_Widget` subclass. */ function unregister_widget( $widget ) { global $wp_widget_factory; $wp_widget_factory->unregister( $widget ); } /** * Creates multiple sidebars. * * If you wanted to quickly create multiple sidebars for a theme or internally. * This function will allow you to do so. If you don't pass the 'name' and/or * 'id' in `$args`, then they will be built for you. * * @since 2.2.0 * * @see register_sidebar() The second parameter is documented by register_sidebar() and is the same here. * * @global array $wp_registered_sidebars The new sidebars are stored in this array by sidebar ID. * * @param int $number Optional. Number of sidebars to create. Default 1. * @param array|string $args { * Optional. Array or string of arguments for building a sidebar. * * @type string $id The base string of the unique identifier for each sidebar. If provided, and multiple * sidebars are being defined, the ID will have "-2" appended, and so on. * Default 'sidebar-' followed by the number the sidebar creation is currently at. * @type string $name The name or title for the sidebars displayed in the admin dashboard. If registering * more than one sidebar, include '%d' in the string as a placeholder for the uniquely * assigned number for each sidebar. * Default 'Sidebar' for the first sidebar, otherwise 'Sidebar %d'. * } */ function register_sidebars( $number = 1, $args = array() ) { global $wp_registered_sidebars; $number = (int) $number; if ( is_string( $args ) ) { parse_str( $args, $args ); } for ( $i = 1; $i <= $number; $i++ ) { $_args = $args; if ( $number > 1 ) { if ( isset( $args['name'] ) ) { $_args['name'] = sprintf( $args['name'], $i ); } else { /* translators: %d: Sidebar number. */ $_args['name'] = sprintf( __( 'Sidebar %d' ), $i ); } } else { $_args['name'] = isset( $args['name'] ) ? $args['name'] : __( 'Sidebar' ); } // Custom specified ID's are suffixed if they exist already. // Automatically generated sidebar names need to be suffixed regardless starting at -0. if ( isset( $args['id'] ) ) { $_args['id'] = $args['id']; $n = 2; // Start at -2 for conflicting custom IDs. while ( is_registered_sidebar( $_args['id'] ) ) { $_args['id'] = $args['id'] . '-' . $n++; } } else { $n = count( $wp_registered_sidebars ); do { $_args['id'] = 'sidebar-' . ++$n; } while ( is_registered_sidebar( $_args['id'] ) ); } register_sidebar( $_args ); } } /** * Builds the definition for a single sidebar and returns the ID. * * Accepts either a string or an array and then parses that against a set * of default arguments for the new sidebar. WordPress will automatically * generate a sidebar ID and name based on the current number of registered * sidebars if those arguments are not included. * * When allowing for automatic generation of the name and ID parameters, keep * in mind that the incrementor for your sidebar can change over time depending * on what other plugins and themes are installed. * * If theme support for 'widgets' has not yet been added when this function is * called, it will be automatically enabled through the use of add_theme_support() * * @since 2.2.0 * @since 5.6.0 Added the `before_sidebar` and `after_sidebar` arguments. * * @global array $wp_registered_sidebars Registered sidebars. * * @param array|string $args { * Optional. Array or string of arguments for the sidebar being registered. * * @type string $name The name or title of the sidebar displayed in the Widgets * interface. Default 'Sidebar $instance'. * @type string $id The unique identifier by which the sidebar will be called. * Default 'sidebar-$instance'. * @type string $description Description of the sidebar, displayed in the Widgets interface. * Default empty string. * @type string $class Extra CSS class to assign to the sidebar in the Widgets interface. * Default empty. * @type string $before_widget HTML content to prepend to each widget's HTML output when assigned * to this sidebar. Receives the widget's ID attribute as `%1$s` * and class name as `%2$s`. Default is an opening list item element. * @type string $after_widget HTML content to append to each widget's HTML output when assigned * to this sidebar. Default is a closing list item element. * @type string $before_title HTML content to prepend to the sidebar title when displayed. * Default is an opening h2 element. * @type string $after_title HTML content to append to the sidebar title when displayed. * Default is a closing h2 element. * @type string $before_sidebar HTML content to prepend to the sidebar when displayed. * Receives the `$id` argument as `%1$s` and `$class` as `%2$s`. * Outputs after the {@see 'dynamic_sidebar_before'} action. * Default empty string. * @type string $after_sidebar HTML content to append to the sidebar when displayed. * Outputs before the {@see 'dynamic_sidebar_after'} action. * Default empty string. * } * @return string Sidebar ID added to $wp_registered_sidebars global. */ function register_sidebar( $args = array() ) { global $wp_registered_sidebars; $i = count( $wp_registered_sidebars ) + 1; $id_is_empty = empty( $args['id'] ); $defaults = array( /* translators: %d: Sidebar number. */ 'name' => sprintf( __( 'Sidebar %d' ), $i ), 'id' => "sidebar-$i", 'description' => '', 'class' => '', 'before_widget' => '<li id="%1$s" class="widget %2$s">', 'after_widget' => "</li>\n", 'before_title' => '<h2 class="widgettitle">', 'after_title' => "</h2>\n", 'before_sidebar' => '', 'after_sidebar' => '', ); /** * Filters the sidebar default arguments. * * @since 5.3.0 * * @see register_sidebar() * * @param array $defaults The default sidebar arguments. */ $sidebar = wp_parse_args( $args, apply_filters( 'register_sidebar_defaults', $defaults ) ); if ( $id_is_empty ) { _doing_it_wrong( __FUNCTION__, sprintf( /* translators: 1: The 'id' argument, 2: Sidebar name, 3: Recommended 'id' value. */ __( 'No %1$s was set in the arguments array for the "%2$s" sidebar. Defaulting to "%3$s". Manually set the %1$s to "%3$s" to silence this notice and keep existing sidebar content.' ), '<code>id</code>', $sidebar['name'], $sidebar['id'] ), '4.2.0' ); } $wp_registered_sidebars[ $sidebar['id'] ] = $sidebar; add_theme_support( 'widgets' ); /** * Fires once a sidebar has been registered. * * @since 3.0.0 * * @param array $sidebar Parsed arguments for the registered sidebar. */ do_action( 'register_sidebar', $sidebar ); return $sidebar['id']; } /** * Removes a sidebar from the list. * * @since 2.2.0 * * @global array $wp_registered_sidebars Registered sidebars. * * @param string|int $sidebar_id The ID of the sidebar when it was registered. */ function unregister_sidebar( $sidebar_id ) { global $wp_registered_sidebars; unset( $wp_registered_sidebars[ $sidebar_id ] ); } /** * Checks if a sidebar is registered. * * @since 4.4.0 * * @global array $wp_registered_sidebars Registered sidebars. * * @param string|int $sidebar_id The ID of the sidebar when it was registered. * @return bool True if the sidebar is registered, false otherwise. */ function is_registered_sidebar( $sidebar_id ) { global $wp_registered_sidebars; return isset( $wp_registered_sidebars[ $sidebar_id ] ); } /** * Register an instance of a widget. * * The default widget option is 'classname' that can be overridden. * * The function can also be used to un-register widgets when `$output_callback` * parameter is an empty string. * * @since 2.2.0 * @since 5.3.0 Formalized the existing and already documented `...$params` parameter * by adding it to the function signature. * @since 5.8.0 Added show_instance_in_rest option. * * @global array $wp_registered_widgets Uses stored registered widgets. * @global array $wp_registered_widget_controls Stores the registered widget controls (options). * @global array $wp_registered_widget_updates * @global array $_wp_deprecated_widgets_callbacks * * @param int|string $id Widget ID. * @param string $name Widget display title. * @param callable $output_callback Run when widget is called. * @param array $options { * Optional. An array of supplementary widget options for the instance. * * @type string $classname Class name for the widget's HTML container. Default is a shortened * version of the output callback name. * @type string $description Widget description for display in the widget administration * panel and/or theme. * @type bool $show_instance_in_rest Whether to show the widget's instance settings in the REST API. * Only available for WP_Widget based widgets. * } * @param mixed ...$params Optional additional parameters to pass to the callback function when it's called. */ function wp_register_sidebar_widget( $id, $name, $output_callback, $options = array(), ...$params ) { global $wp_registered_widgets, $wp_registered_widget_controls, $wp_registered_widget_updates, $_wp_deprecated_widgets_callbacks; $id = strtolower( $id ); if ( empty( $output_callback ) ) { unset( $wp_registered_widgets[ $id ] ); return; } $id_base = _get_widget_id_base( $id ); if ( in_array( $output_callback, $_wp_deprecated_widgets_callbacks, true ) && ! is_callable( $output_callback ) ) { unset( $wp_registered_widget_controls[ $id ] ); unset( $wp_registered_widget_updates[ $id_base ] ); return; } $defaults = array( 'classname' => $output_callback ); $options = wp_parse_args( $options, $defaults ); $widget = array( 'name' => $name, 'id' => $id, 'callback' => $output_callback, 'params' => $params, ); $widget = array_merge( $widget, $options ); if ( is_callable( $output_callback ) && ( ! isset( $wp_registered_widgets[ $id ] ) || did_action( 'widgets_init' ) ) ) { /** * Fires once for each registered widget. * * @since 3.0.0 * * @param array $widget An array of default widget arguments. */ do_action( 'wp_register_sidebar_widget', $widget ); $wp_registered_widgets[ $id ] = $widget; } } /** * Retrieve description for widget. * * When registering widgets, the options can also include 'description' that * describes the widget for display on the widget administration panel or * in the theme. * * @since 2.5.0 * * @global array $wp_registered_widgets * * @param int|string $id Widget ID. * @return string|void Widget description, if available. */ function wp_widget_description( $id ) { if ( ! is_scalar( $id ) ) { return; } global $wp_registered_widgets; if ( isset( $wp_registered_widgets[ $id ]['description'] ) ) { return esc_html( $wp_registered_widgets[ $id ]['description'] ); } } /** * Retrieve description for a sidebar. * * When registering sidebars a 'description' parameter can be included that * describes the sidebar for display on the widget administration panel. * * @since 2.9.0 * * @global array $wp_registered_sidebars Registered sidebars. * * @param string $id sidebar ID. * @return string|void Sidebar description, if available. */ function wp_sidebar_description( $id ) { if ( ! is_scalar( $id ) ) { return; } global $wp_registered_sidebars; if ( isset( $wp_registered_sidebars[ $id ]['description'] ) ) { return wp_kses( $wp_registered_sidebars[ $id ]['description'], 'sidebar_description' ); } } /** * Remove widget from sidebar. * * @since 2.2.0 * * @param int|string $id Widget ID. */ function wp_unregister_sidebar_widget( $id ) { /** * Fires just before a widget is removed from a sidebar. * * @since 3.0.0 * * @param int $id The widget ID. */ do_action( 'wp_unregister_sidebar_widget', $id ); wp_register_sidebar_widget( $id, '', '' ); wp_unregister_widget_control( $id ); } /** * Registers widget control callback for customizing options. * * @since 2.2.0 * @since 5.3.0 Formalized the existing and already documented `...$params` parameter * by adding it to the function signature. * * @global array $wp_registered_widget_controls * @global array $wp_registered_widget_updates * @global array $wp_registered_widgets * @global array $_wp_deprecated_widgets_callbacks * * @param int|string $id Sidebar ID. * @param string $name Sidebar display name. * @param callable $control_callback Run when sidebar is displayed. * @param array $options { * Optional. Array or string of control options. Default empty array. * * @type int $height Never used. Default 200. * @type int $width Width of the fully expanded control form (but try hard to use the default width). * Default 250. * @type int|string $id_base Required for multi-widgets, i.e widgets that allow multiple instances such as the * text widget. The widget id will end up looking like `{$id_base}-{$unique_number}`. * } * @param mixed ...$params Optional additional parameters to pass to the callback function when it's called. */ function wp_register_widget_control( $id, $name, $control_callback, $options = array(), ...$params ) { global $wp_registered_widget_controls, $wp_registered_widget_updates, $wp_registered_widgets, $_wp_deprecated_widgets_callbacks; $id = strtolower( $id ); $id_base = _get_widget_id_base( $id ); if ( empty( $control_callback ) ) { unset( $wp_registered_widget_controls[ $id ] ); unset( $wp_registered_widget_updates[ $id_base ] ); return; } if ( in_array( $control_callback, $_wp_deprecated_widgets_callbacks, true ) && ! is_callable( $control_callback ) ) { unset( $wp_registered_widgets[ $id ] ); return; } if ( isset( $wp_registered_widget_controls[ $id ] ) && ! did_action( 'widgets_init' ) ) { return; } $defaults = array( 'width' => 250, 'height' => 200, ); // Height is never used. $options = wp_parse_args( $options, $defaults ); $options['width'] = (int) $options['width']; $options['height'] = (int) $options['height']; $widget = array( 'name' => $name, 'id' => $id, 'callback' => $control_callback, 'params' => $params, ); $widget = array_merge( $widget, $options ); $wp_registered_widget_controls[ $id ] = $widget; if ( isset( $wp_registered_widget_updates[ $id_base ] ) ) { return; } if ( isset( $widget['params'][0]['number'] ) ) { $widget['params'][0]['number'] = -1; } unset( $widget['width'], $widget['height'], $widget['name'], $widget['id'] ); $wp_registered_widget_updates[ $id_base ] = $widget; } /** * Registers the update callback for a widget. * * @since 2.8.0 * @since 5.3.0 Formalized the existing and already documented `...$params` parameter * by adding it to the function signature. * * @global array $wp_registered_widget_updates * * @param string $id_base The base ID of a widget created by extending WP_Widget. * @param callable $update_callback Update callback method for the widget. * @param array $options Optional. Widget control options. See wp_register_widget_control(). * Default empty array. * @param mixed ...$params Optional additional parameters to pass to the callback function when it's called. */ function _register_widget_update_callback( $id_base, $update_callback, $options = array(), ...$params ) { global $wp_registered_widget_updates; if ( isset( $wp_registered_widget_updates[ $id_base ] ) ) { if ( empty( $update_callback ) ) { unset( $wp_registered_widget_updates[ $id_base ] ); } return; } $widget = array( 'callback' => $update_callback, 'params' => $params, ); $widget = array_merge( $widget, $options ); $wp_registered_widget_updates[ $id_base ] = $widget; } /** * Registers the form callback for a widget. * * @since 2.8.0 * @since 5.3.0 Formalized the existing and already documented `...$params` parameter * by adding it to the function signature. * * @global array $wp_registered_widget_controls * * @param int|string $id Widget ID. * @param string $name Name attribute for the widget. * @param callable $form_callback Form callback. * @param array $options Optional. Widget control options. See wp_register_widget_control(). * Default empty array. * @param mixed ...$params Optional additional parameters to pass to the callback function when it's called. */ function _register_widget_form_callback( $id, $name, $form_callback, $options = array(), ...$params ) { global $wp_registered_widget_controls; $id = strtolower( $id ); if ( empty( $form_callback ) ) { unset( $wp_registered_widget_controls[ $id ] ); return; } if ( isset( $wp_registered_widget_controls[ $id ] ) && ! did_action( 'widgets_init' ) ) { return; } $defaults = array( 'width' => 250, 'height' => 200, ); $options = wp_parse_args( $options, $defaults ); $options['width'] = (int) $options['width']; $options['height'] = (int) $options['height']; $widget = array( 'name' => $name, 'id' => $id, 'callback' => $form_callback, 'params' => $params, ); $widget = array_merge( $widget, $options ); $wp_registered_widget_controls[ $id ] = $widget; } /** * Remove control callback for widget. * * @since 2.2.0 * * @param int|string $id Widget ID. */ function wp_unregister_widget_control( $id ) { wp_register_widget_control( $id, '', '' ); } /** * Display dynamic sidebar. * * By default this displays the default sidebar or 'sidebar-1'. If your theme specifies the 'id' or * 'name' parameter for its registered sidebars you can pass an ID or name as the $index parameter. * Otherwise, you can pass in a numerical index to display the sidebar at that index. * * @since 2.2.0 * * @global array $wp_registered_sidebars Registered sidebars. * @global array $wp_registered_widgets Registered widgets. * * @param int|string $index Optional. Index, name or ID of dynamic sidebar. Default 1. * @return bool True, if widget sidebar was found and called. False if not found or not called. */ function dynamic_sidebar( $index = 1 ) { global $wp_registered_sidebars, $wp_registered_widgets; if ( is_int( $index ) ) { $index = "sidebar-$index"; } else { $index = sanitize_title( $index ); foreach ( (array) $wp_registered_sidebars as $key => $value ) { if ( sanitize_title( $value['name'] ) === $index ) { $index = $key; break; } } } $sidebars_widgets = wp_get_sidebars_widgets(); if ( empty( $wp_registered_sidebars[ $index ] ) || empty( $sidebars_widgets[ $index ] ) || ! is_array( $sidebars_widgets[ $index ] ) ) { /** This action is documented in wp-includes/widget.php */ do_action( 'dynamic_sidebar_before', $index, false ); /** This action is documented in wp-includes/widget.php */ do_action( 'dynamic_sidebar_after', $index, false ); /** This filter is documented in wp-includes/widget.php */ return apply_filters( 'dynamic_sidebar_has_widgets', false, $index ); } $sidebar = $wp_registered_sidebars[ $index ]; $sidebar['before_sidebar'] = sprintf( $sidebar['before_sidebar'], $sidebar['id'], $sidebar['class'] ); /** * Fires before widgets are rendered in a dynamic sidebar. * * Note: The action also fires for empty sidebars, and on both the front end * and back end, including the Inactive Widgets sidebar on the Widgets screen. * * @since 3.9.0 * * @param int|string $index Index, name, or ID of the dynamic sidebar. * @param bool $has_widgets Whether the sidebar is populated with widgets. * Default true. */ do_action( 'dynamic_sidebar_before', $index, true ); if ( ! is_admin() && ! empty( $sidebar['before_sidebar'] ) ) { echo $sidebar['before_sidebar']; } $did_one = false; foreach ( (array) $sidebars_widgets[ $index ] as $id ) { if ( ! isset( $wp_registered_widgets[ $id ] ) ) { continue; } $params = array_merge( array( array_merge( $sidebar, array( 'widget_id' => $id, 'widget_name' => $wp_registered_widgets[ $id ]['name'], ) ), ), (array) $wp_registered_widgets[ $id ]['params'] ); // Substitute HTML `id` and `class` attributes into `before_widget`. $classname_ = ''; foreach ( (array) $wp_registered_widgets[ $id ]['classname'] as $cn ) { if ( is_string( $cn ) ) { $classname_ .= '_' . $cn; } elseif ( is_object( $cn ) ) { $classname_ .= '_' . get_class( $cn ); } } $classname_ = ltrim( $classname_, '_' ); $params[0]['before_widget'] = sprintf( $params[0]['before_widget'], str_replace( '\\', '_', $id ), $classname_ ); /** * Filters the parameters passed to a widget's display callback. * * Note: The filter is evaluated on both the front end and back end, * including for the Inactive Widgets sidebar on the Widgets screen. * * @since 2.5.0 * * @see register_sidebar() * * @param array $params { * @type array $args { * An array of widget display arguments. * * @type string $name Name of the sidebar the widget is assigned to. * @type string $id ID of the sidebar the widget is assigned to. * @type string $description The sidebar description. * @type string $class CSS class applied to the sidebar container. * @type string $before_widget HTML markup to prepend to each widget in the sidebar. * @type string $after_widget HTML markup to append to each widget in the sidebar. * @type string $before_title HTML markup to prepend to the widget title when displayed. * @type string $after_title HTML markup to append to the widget title when displayed. * @type string $widget_id ID of the widget. * @type string $widget_name Name of the widget. * } * @type array $widget_args { * An array of multi-widget arguments. * * @type int $number Number increment used for multiples of the same widget. * } * } */ $params = apply_filters( 'dynamic_sidebar_params', $params ); $callback = $wp_registered_widgets[ $id ]['callback']; /** * Fires before a widget's display callback is called. * * Note: The action fires on both the front end and back end, including * for widgets in the Inactive Widgets sidebar on the Widgets screen. * * The action is not fired for empty sidebars. * * @since 3.0.0 * * @param array $widget { * An associative array of widget arguments. * * @type string $name Name of the widget. * @type string $id Widget ID. * @type callable $callback When the hook is fired on the front end, `$callback` is an array * containing the widget object. Fired on the back end, `$callback` * is 'wp_widget_control', see `$_callback`. * @type array $params An associative array of multi-widget arguments. * @type string $classname CSS class applied to the widget container. * @type string $description The widget description. * @type array $_callback When the hook is fired on the back end, `$_callback` is populated * with an array containing the widget object, see `$callback`. * } */ do_action( 'dynamic_sidebar', $wp_registered_widgets[ $id ] ); if ( is_callable( $callback ) ) { call_user_func_array( $callback, $params ); $did_one = true; } } if ( ! is_admin() && ! empty( $sidebar['after_sidebar'] ) ) { echo $sidebar['after_sidebar']; } /** * Fires after widgets are rendered in a dynamic sidebar. * * Note: The action also fires for empty sidebars, and on both the front end * and back end, including the Inactive Widgets sidebar on the Widgets screen. * * @since 3.9.0 * * @param int|string $index Index, name, or ID of the dynamic sidebar. * @param bool $has_widgets Whether the sidebar is populated with widgets. * Default true. */ do_action( 'dynamic_sidebar_after', $index, true ); /** * Filters whether a sidebar has widgets. * * Note: The filter is also evaluated for empty sidebars, and on both the front end * and back end, including the Inactive Widgets sidebar on the Widgets screen. * * @since 3.9.0 * * @param bool $did_one Whether at least one widget was rendered in the sidebar. * Default false. * @param int|string $index Index, name, or ID of the dynamic sidebar. */ return apply_filters( 'dynamic_sidebar_has_widgets', $did_one, $index ); } /** * Determines whether a given widget is displayed on the front end. * * Either $callback or $id_base can be used * $id_base is the first argument when extending WP_Widget class * Without the optional $widget_id parameter, returns the ID of the first sidebar * in which the first instance of the widget with the given callback or $id_base is found. * With the $widget_id parameter, returns the ID of the sidebar where * the widget with that callback/$id_base AND that ID is found. * * NOTE: $widget_id and $id_base are the same for single widgets. To be effective * this function has to run after widgets have initialized, at action {@see 'init'} or later. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 2.2.0 * * @global array $wp_registered_widgets * * @param callable|false $callback Optional. Widget callback to check. Default false. * @param string|false $widget_id Optional. Widget ID. Optional, but needed for checking. * Default false. * @param string|false $id_base Optional. The base ID of a widget created by extending WP_Widget. * Default false. * @param bool $skip_inactive Optional. Whether to check in 'wp_inactive_widgets'. * Default true. * @return string|false ID of the sidebar in which the widget is active, * false if the widget is not active. */ function is_active_widget( $callback = false, $widget_id = false, $id_base = false, $skip_inactive = true ) { global $wp_registered_widgets; $sidebars_widgets = wp_get_sidebars_widgets(); if ( is_array( $sidebars_widgets ) ) { foreach ( $sidebars_widgets as $sidebar => $widgets ) { if ( $skip_inactive && ( 'wp_inactive_widgets' === $sidebar || 'orphaned_widgets' === substr( $sidebar, 0, 16 ) ) ) { continue; } if ( is_array( $widgets ) ) { foreach ( $widgets as $widget ) { if ( ( $callback && isset( $wp_registered_widgets[ $widget ]['callback'] ) && $wp_registered_widgets[ $widget ]['callback'] === $callback ) || ( $id_base && _get_widget_id_base( $widget ) === $id_base ) ) { if ( ! $widget_id || $widget_id === $wp_registered_widgets[ $widget ]['id'] ) { return $sidebar; } } } } } } return false; } /** * Determines whether the dynamic sidebar is enabled and used by the theme. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 2.2.0 * * @global array $wp_registered_widgets Registered widgets. * @global array $wp_registered_sidebars Registered sidebars. * * @return bool True if using widgets, false otherwise. */ function is_dynamic_sidebar() { global $wp_registered_widgets, $wp_registered_sidebars; $sidebars_widgets = get_option( 'sidebars_widgets' ); foreach ( (array) $wp_registered_sidebars as $index => $sidebar ) { if ( ! empty( $sidebars_widgets[ $index ] ) ) { foreach ( (array) $sidebars_widgets[ $index ] as $widget ) { if ( array_key_exists( $widget, $wp_registered_widgets ) ) { return true; } } } } return false; } /** * Determines whether a sidebar contains widgets. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 2.8.0 * * @param string|int $index Sidebar name, id or number to check. * @return bool True if the sidebar has widgets, false otherwise. */ function is_active_sidebar( $index ) { $index = ( is_int( $index ) ) ? "sidebar-$index" : sanitize_title( $index ); $sidebars_widgets = wp_get_sidebars_widgets(); $is_active_sidebar = ! empty( $sidebars_widgets[ $index ] ); /** * Filters whether a dynamic sidebar is considered "active". * * @since 3.9.0 * * @param bool $is_active_sidebar Whether or not the sidebar should be considered "active". * In other words, whether the sidebar contains any widgets. * @param int|string $index Index, name, or ID of the dynamic sidebar. */ return apply_filters( 'is_active_sidebar', $is_active_sidebar, $index ); } // // Internal Functions. // /** * Retrieve full list of sidebars and their widget instance IDs. * * Will upgrade sidebar widget list, if needed. Will also save updated list, if * needed. * * @since 2.2.0 * @access private * * @global array $_wp_sidebars_widgets * @global array $sidebars_widgets * * @param bool $deprecated Not used (argument deprecated). * @return array Upgraded list of widgets to version 3 array format when called from the admin. */ function wp_get_sidebars_widgets( $deprecated = true ) { if ( true !== $deprecated ) { _deprecated_argument( __FUNCTION__, '2.8.1' ); } global $_wp_sidebars_widgets, $sidebars_widgets; // If loading from front page, consult $_wp_sidebars_widgets rather than options // to see if wp_convert_widget_settings() has made manipulations in memory. if ( ! is_admin() ) { if ( empty( $_wp_sidebars_widgets ) ) { $_wp_sidebars_widgets = get_option( 'sidebars_widgets', array() ); } $sidebars_widgets = $_wp_sidebars_widgets; } else { $sidebars_widgets = get_option( 'sidebars_widgets', array() ); } if ( is_array( $sidebars_widgets ) && isset( $sidebars_widgets['array_version'] ) ) { unset( $sidebars_widgets['array_version'] ); } /** * Filters the list of sidebars and their widgets. * * @since 2.7.0 * * @param array $sidebars_widgets An associative array of sidebars and their widgets. */ return apply_filters( 'sidebars_widgets', $sidebars_widgets ); } /** * Set the sidebar widget option to update sidebars. * * @since 2.2.0 * @access private * * @global array $_wp_sidebars_widgets * @param array $sidebars_widgets Sidebar widgets and their settings. */ function wp_set_sidebars_widgets( $sidebars_widgets ) { global $_wp_sidebars_widgets; // Clear cached value used in wp_get_sidebars_widgets(). $_wp_sidebars_widgets = null; if ( ! isset( $sidebars_widgets['array_version'] ) ) { $sidebars_widgets['array_version'] = 3; } update_option( 'sidebars_widgets', $sidebars_widgets ); } /** * Retrieve default registered sidebars list. * * @since 2.2.0 * @access private * * @global array $wp_registered_sidebars Registered sidebars. * * @return array */ function wp_get_widget_defaults() { global $wp_registered_sidebars; $defaults = array(); foreach ( (array) $wp_registered_sidebars as $index => $sidebar ) { $defaults[ $index ] = array(); } return $defaults; } /** * Converts the widget settings from single to multi-widget format. * * @since 2.8.0 * * @global array $_wp_sidebars_widgets * * @param string $base_name Root ID for all widgets of this type. * @param string $option_name Option name for this widget type. * @param array $settings The array of widget instance settings. * @return array The array of widget settings converted to multi-widget format. */ function wp_convert_widget_settings( $base_name, $option_name, $settings ) { // This test may need expanding. $single = false; $changed = false; if ( empty( $settings ) ) { $single = true; } else { foreach ( array_keys( $settings ) as $number ) { if ( 'number' === $number ) { continue; } if ( ! is_numeric( $number ) ) { $single = true; break; } } } if ( $single ) { $settings = array( 2 => $settings ); // If loading from the front page, update sidebar in memory but don't save to options. if ( is_admin() ) { $sidebars_widgets = get_option( 'sidebars_widgets' ); } else { if ( empty( $GLOBALS['_wp_sidebars_widgets'] ) ) { $GLOBALS['_wp_sidebars_widgets'] = get_option( 'sidebars_widgets', array() ); } $sidebars_widgets = &$GLOBALS['_wp_sidebars_widgets']; } foreach ( (array) $sidebars_widgets as $index => $sidebar ) { if ( is_array( $sidebar ) ) { foreach ( $sidebar as $i => $name ) { if ( $base_name === $name ) { $sidebars_widgets[ $index ][ $i ] = "$name-2"; $changed = true; break 2; } } } } if ( is_admin() && $changed ) { update_option( 'sidebars_widgets', $sidebars_widgets ); } } $settings['_multiwidget'] = 1; if ( is_admin() ) { update_option( $option_name, $settings ); } return $settings; } /** * Output an arbitrary widget as a template tag. * * @since 2.8.0 * * @global WP_Widget_Factory $wp_widget_factory * * @param string $widget The widget's PHP class name (see class-wp-widget.php). * @param array $instance Optional. The widget's instance settings. Default empty array. * @param array $args { * Optional. Array of arguments to configure the display of the widget. * * @type string $before_widget HTML content that will be prepended to the widget's HTML output. * Default `<div class="widget %s">`, where `%s` is the widget's class name. * @type string $after_widget HTML content that will be appended to the widget's HTML output. * Default `</div>`. * @type string $before_title HTML content that will be prepended to the widget's title when displayed. * Default `<h2 class="widgettitle">`. * @type string $after_title HTML content that will be appended to the widget's title when displayed. * Default `</h2>`. * } */ function the_widget( $widget, $instance = array(), $args = array() ) { global $wp_widget_factory; if ( ! isset( $wp_widget_factory->widgets[ $widget ] ) ) { _doing_it_wrong( __FUNCTION__, sprintf( /* translators: %s: register_widget() */ __( 'Widgets need to be registered using %s, before they can be displayed.' ), '<code>register_widget()</code>' ), '4.9.0' ); return; } $widget_obj = $wp_widget_factory->widgets[ $widget ]; if ( ! ( $widget_obj instanceof WP_Widget ) ) { return; } $default_args = array( 'before_widget' => '<div class="widget %s">', 'after_widget' => '</div>', 'before_title' => '<h2 class="widgettitle">', 'after_title' => '</h2>', ); $args = wp_parse_args( $args, $default_args ); $args['before_widget'] = sprintf( $args['before_widget'], $widget_obj->widget_options['classname'] ); $instance = wp_parse_args( $instance ); /** This filter is documented in wp-includes/class-wp-widget.php */ $instance = apply_filters( 'widget_display_callback', $instance, $widget_obj, $args ); if ( false === $instance ) { return; } /** * Fires before rendering the requested widget. * * @since 3.0.0 * * @param string $widget The widget's class name. * @param array $instance The current widget instance's settings. * @param array $args An array of the widget's sidebar arguments. */ do_action( 'the_widget', $widget, $instance, $args ); $widget_obj->_set( -1 ); $widget_obj->widget( $args, $instance ); } /** * Retrieves the widget ID base value. * * @since 2.8.0 * * @param string $id Widget ID. * @return string Widget ID base. */ function _get_widget_id_base( $id ) { return preg_replace( '/-[0-9]+$/', '', $id ); } /** * Handle sidebars config after theme change * * @access private * @since 3.3.0 * * @global array $sidebars_widgets */ function _wp_sidebars_changed() { global $sidebars_widgets; if ( ! is_array( $sidebars_widgets ) ) { $sidebars_widgets = wp_get_sidebars_widgets(); } retrieve_widgets( true ); } /** * Look for "lost" widgets, this has to run at least on each theme change. * * @since 2.8.0 * * @global array $wp_registered_sidebars Registered sidebars. * @global array $sidebars_widgets * @global array $wp_registered_widgets Registered widgets. * * @param string|bool $theme_changed Whether the theme was changed as a boolean. A value * of 'customize' defers updates for the Customizer. * @return array Updated sidebars widgets. */ function retrieve_widgets( $theme_changed = false ) { global $wp_registered_sidebars, $sidebars_widgets, $wp_registered_widgets; $registered_sidebars_keys = array_keys( $wp_registered_sidebars ); $registered_widgets_ids = array_keys( $wp_registered_widgets ); if ( ! is_array( get_theme_mod( 'sidebars_widgets' ) ) ) { if ( empty( $sidebars_widgets ) ) { return array(); } unset( $sidebars_widgets['array_version'] ); $sidebars_widgets_keys = array_keys( $sidebars_widgets ); sort( $sidebars_widgets_keys ); sort( $registered_sidebars_keys ); if ( $sidebars_widgets_keys === $registered_sidebars_keys ) { $sidebars_widgets = _wp_remove_unregistered_widgets( $sidebars_widgets, $registered_widgets_ids ); return $sidebars_widgets; } } // Discard invalid, theme-specific widgets from sidebars. $sidebars_widgets = _wp_remove_unregistered_widgets( $sidebars_widgets, $registered_widgets_ids ); $sidebars_widgets = wp_map_sidebars_widgets( $sidebars_widgets ); // Find hidden/lost multi-widget instances. $shown_widgets = array_merge( ...array_values( $sidebars_widgets ) ); $lost_widgets = array_diff( $registered_widgets_ids, $shown_widgets ); foreach ( $lost_widgets as $key => $widget_id ) { $number = preg_replace( '/.+?-([0-9]+)$/', '$1', $widget_id ); // Only keep active and default widgets. if ( is_numeric( $number ) && (int) $number < 2 ) { unset( $lost_widgets[ $key ] ); } } $sidebars_widgets['wp_inactive_widgets'] = array_merge( $lost_widgets, (array) $sidebars_widgets['wp_inactive_widgets'] ); if ( 'customize' !== $theme_changed ) { wp_set_sidebars_widgets( $sidebars_widgets ); } return $sidebars_widgets; } /** * Compares a list of sidebars with their widgets against an allowed list. * * @since 4.9.0 * @since 4.9.2 Always tries to restore widget assignments from previous data, not just if sidebars needed mapping. * * @param array $existing_sidebars_widgets List of sidebars and their widget instance IDs. * @return array Mapped sidebars widgets. */ function wp_map_sidebars_widgets( $existing_sidebars_widgets ) { global $wp_registered_sidebars; $new_sidebars_widgets = array( 'wp_inactive_widgets' => array(), ); // Short-circuit if there are no sidebars to map. if ( ! is_array( $existing_sidebars_widgets ) || empty( $existing_sidebars_widgets ) ) { return $new_sidebars_widgets; } foreach ( $existing_sidebars_widgets as $sidebar => $widgets ) { if ( 'wp_inactive_widgets' === $sidebar || 'orphaned_widgets' === substr( $sidebar, 0, 16 ) ) { $new_sidebars_widgets['wp_inactive_widgets'] = array_merge( $new_sidebars_widgets['wp_inactive_widgets'], (array) $widgets ); unset( $existing_sidebars_widgets[ $sidebar ] ); } } // If old and new theme have just one sidebar, map it and we're done. if ( 1 === count( $existing_sidebars_widgets ) && 1 === count( $wp_registered_sidebars ) ) { $new_sidebars_widgets[ key( $wp_registered_sidebars ) ] = array_pop( $existing_sidebars_widgets ); return $new_sidebars_widgets; } // Map locations with the same slug. $existing_sidebars = array_keys( $existing_sidebars_widgets ); foreach ( $wp_registered_sidebars as $sidebar => $name ) { if ( in_array( $sidebar, $existing_sidebars, true ) ) { $new_sidebars_widgets[ $sidebar ] = $existing_sidebars_widgets[ $sidebar ]; unset( $existing_sidebars_widgets[ $sidebar ] ); } elseif ( ! array_key_exists( $sidebar, $new_sidebars_widgets ) ) { $new_sidebars_widgets[ $sidebar ] = array(); } } // If there are more sidebars, try to map them. if ( ! empty( $existing_sidebars_widgets ) ) { /* * If old and new theme both have sidebars that contain phrases * from within the same group, make an educated guess and map it. */ $common_slug_groups = array( array( 'sidebar', 'primary', 'main', 'right' ), array( 'second', 'left' ), array( 'sidebar-2', 'footer', 'bottom' ), array( 'header', 'top' ), ); // Go through each group... foreach ( $common_slug_groups as $slug_group ) { // ...and see if any of these slugs... foreach ( $slug_group as $slug ) { // ...and any of the new sidebars... foreach ( $wp_registered_sidebars as $new_sidebar => $args ) { // ...actually match! if ( false === stripos( $new_sidebar, $slug ) && false === stripos( $slug, $new_sidebar ) ) { continue; } // Then see if any of the existing sidebars... foreach ( $existing_sidebars_widgets as $sidebar => $widgets ) { // ...and any slug in the same group... foreach ( $slug_group as $slug ) { // ... have a match as well. if ( false === stripos( $sidebar, $slug ) && false === stripos( $slug, $sidebar ) ) { continue; } // Make sure this sidebar wasn't mapped and removed previously. if ( ! empty( $existing_sidebars_widgets[ $sidebar ] ) ) { // We have a match that can be mapped! $new_sidebars_widgets[ $new_sidebar ] = array_merge( $new_sidebars_widgets[ $new_sidebar ], $existing_sidebars_widgets[ $sidebar ] ); // Remove the mapped sidebar so it can't be mapped again. unset( $existing_sidebars_widgets[ $sidebar ] ); // Go back and check the next new sidebar. continue 3; } } // End foreach ( $slug_group as $slug ). } // End foreach ( $existing_sidebars_widgets as $sidebar => $widgets ). } // End foreach ( $wp_registered_sidebars as $new_sidebar => $args ). } // End foreach ( $slug_group as $slug ). } // End foreach ( $common_slug_groups as $slug_group ). } // Move any left over widgets to inactive sidebar. foreach ( $existing_sidebars_widgets as $widgets ) { if ( is_array( $widgets ) && ! empty( $widgets ) ) { $new_sidebars_widgets['wp_inactive_widgets'] = array_merge( $new_sidebars_widgets['wp_inactive_widgets'], $widgets ); } } // Sidebars_widgets settings from when this theme was previously active. $old_sidebars_widgets = get_theme_mod( 'sidebars_widgets' ); $old_sidebars_widgets = isset( $old_sidebars_widgets['data'] ) ? $old_sidebars_widgets['data'] : false; if ( is_array( $old_sidebars_widgets ) ) { // Remove empty sidebars, no need to map those. $old_sidebars_widgets = array_filter( $old_sidebars_widgets ); // Only check sidebars that are empty or have not been mapped to yet. foreach ( $new_sidebars_widgets as $new_sidebar => $new_widgets ) { if ( array_key_exists( $new_sidebar, $old_sidebars_widgets ) && ! empty( $new_widgets ) ) { unset( $old_sidebars_widgets[ $new_sidebar ] ); } } // Remove orphaned widgets, we're only interested in previously active sidebars. foreach ( $old_sidebars_widgets as $sidebar => $widgets ) { if ( 'orphaned_widgets' === substr( $sidebar, 0, 16 ) ) { unset( $old_sidebars_widgets[ $sidebar ] ); } } $old_sidebars_widgets = _wp_remove_unregistered_widgets( $old_sidebars_widgets ); if ( ! empty( $old_sidebars_widgets ) ) { // Go through each remaining sidebar... foreach ( $old_sidebars_widgets as $old_sidebar => $old_widgets ) { // ...and check every new sidebar... foreach ( $new_sidebars_widgets as $new_sidebar => $new_widgets ) { // ...for every widget we're trying to revive. foreach ( $old_widgets as $key => $widget_id ) { $active_key = array_search( $widget_id, $new_widgets, true ); // If the widget is used elsewhere... if ( false !== $active_key ) { // ...and that elsewhere is inactive widgets... if ( 'wp_inactive_widgets' === $new_sidebar ) { // ...remove it from there and keep the active version... unset( $new_sidebars_widgets['wp_inactive_widgets'][ $active_key ] ); } else { // ...otherwise remove it from the old sidebar and keep it in the new one. unset( $old_sidebars_widgets[ $old_sidebar ][ $key ] ); } } // End if ( $active_key ). } // End foreach ( $old_widgets as $key => $widget_id ). } // End foreach ( $new_sidebars_widgets as $new_sidebar => $new_widgets ). } // End foreach ( $old_sidebars_widgets as $old_sidebar => $old_widgets ). } // End if ( ! empty( $old_sidebars_widgets ) ). // Restore widget settings from when theme was previously active. $new_sidebars_widgets = array_merge( $new_sidebars_widgets, $old_sidebars_widgets ); } return $new_sidebars_widgets; } /** * Compares a list of sidebars with their widgets against an allowed list. * * @since 4.9.0 * * @param array $sidebars_widgets List of sidebars and their widget instance IDs. * @param array $allowed_widget_ids Optional. List of widget IDs to compare against. Default: Registered widgets. * @return array Sidebars with allowed widgets. */ function _wp_remove_unregistered_widgets( $sidebars_widgets, $allowed_widget_ids = array() ) { if ( empty( $allowed_widget_ids ) ) { $allowed_widget_ids = array_keys( $GLOBALS['wp_registered_widgets'] ); } foreach ( $sidebars_widgets as $sidebar => $widgets ) { if ( is_array( $widgets ) ) { $sidebars_widgets[ $sidebar ] = array_intersect( $widgets, $allowed_widget_ids ); } } return $sidebars_widgets; } /** * Display the RSS entries in a list. * * @since 2.5.0 * * @param string|array|object $rss RSS url. * @param array $args Widget arguments. */ function wp_widget_rss_output( $rss, $args = array() ) { if ( is_string( $rss ) ) { $rss = fetch_feed( $rss ); } elseif ( is_array( $rss ) && isset( $rss['url'] ) ) { $args = $rss; $rss = fetch_feed( $rss['url'] ); } elseif ( ! is_object( $rss ) ) { return; } if ( is_wp_error( $rss ) ) { if ( is_admin() || current_user_can( 'manage_options' ) ) { echo '<p><strong>' . __( 'RSS Error:' ) . '</strong> ' . $rss->get_error_message() . '</p>'; } return; } $default_args = array( 'show_author' => 0, 'show_date' => 0, 'show_summary' => 0, 'items' => 0, ); $args = wp_parse_args( $args, $default_args ); $items = (int) $args['items']; if ( $items < 1 || 20 < $items ) { $items = 10; } $show_summary = (int) $args['show_summary']; $show_author = (int) $args['show_author']; $show_date = (int) $args['show_date']; if ( ! $rss->get_item_quantity() ) { echo '<ul><li>' . __( 'An error has occurred, which probably means the feed is down. Try again later.' ) . '</li></ul>'; $rss->__destruct(); unset( $rss ); return; } echo '<ul>'; foreach ( $rss->get_items( 0, $items ) as $item ) { $link = $item->get_link(); while ( ! empty( $link ) && stristr( $link, 'http' ) !== $link ) { $link = substr( $link, 1 ); } $link = esc_url( strip_tags( $link ) ); $title = esc_html( trim( strip_tags( $item->get_title() ) ) ); if ( empty( $title ) ) { $title = __( 'Untitled' ); } $desc = html_entity_decode( $item->get_description(), ENT_QUOTES, get_option( 'blog_charset' ) ); $desc = esc_attr( wp_trim_words( $desc, 55, ' […]' ) ); $summary = ''; if ( $show_summary ) { $summary = $desc; // Change existing [...] to […]. if ( '[...]' === substr( $summary, -5 ) ) { $summary = substr( $summary, 0, -5 ) . '[…]'; } $summary = '<div class="rssSummary">' . esc_html( $summary ) . '</div>'; } $date = ''; if ( $show_date ) { $date = $item->get_date( 'U' ); if ( $date ) { $date = ' <span class="rss-date">' . date_i18n( get_option( 'date_format' ), $date ) . '</span>'; } } $author = ''; if ( $show_author ) { $author = $item->get_author(); if ( is_object( $author ) ) { $author = $author->get_name(); $author = ' <cite>' . esc_html( strip_tags( $author ) ) . '</cite>'; } } if ( '' === $link ) { echo "<li>$title{$date}{$summary}{$author}</li>"; } elseif ( $show_summary ) { echo "<li><a class='rsswidget' href='$link'>$title</a>{$date}{$summary}{$author}</li>"; } else { echo "<li><a class='rsswidget' href='$link'>$title</a>{$date}{$author}</li>"; } } echo '</ul>'; $rss->__destruct(); unset( $rss ); } /** * Display RSS widget options form. * * The options for what fields are displayed for the RSS form are all booleans * and are as follows: 'url', 'title', 'items', 'show_summary', 'show_author', * 'show_date'. * * @since 2.5.0 * * @param array|string $args Values for input fields. * @param array $inputs Override default display options. */ function wp_widget_rss_form( $args, $inputs = null ) { $default_inputs = array( 'url' => true, 'title' => true, 'items' => true, 'show_summary' => true, 'show_author' => true, 'show_date' => true, ); $inputs = wp_parse_args( $inputs, $default_inputs ); $args['title'] = isset( $args['title'] ) ? $args['title'] : ''; $args['url'] = isset( $args['url'] ) ? $args['url'] : ''; $args['items'] = isset( $args['items'] ) ? (int) $args['items'] : 0; if ( $args['items'] < 1 || 20 < $args['items'] ) { $args['items'] = 10; } $args['show_summary'] = isset( $args['show_summary'] ) ? (int) $args['show_summary'] : (int) $inputs['show_summary']; $args['show_author'] = isset( $args['show_author'] ) ? (int) $args['show_author'] : (int) $inputs['show_author']; $args['show_date'] = isset( $args['show_date'] ) ? (int) $args['show_date'] : (int) $inputs['show_date']; if ( ! empty( $args['error'] ) ) { echo '<p class="widget-error"><strong>' . __( 'RSS Error:' ) . '</strong> ' . $args['error'] . '</p>'; } $esc_number = esc_attr( $args['number'] ); if ( $inputs['url'] ) : ?> <p><label for="rss-url-<?php echo $esc_number; ?>"><?php _e( 'Enter the RSS feed URL here:' ); ?></label> <input class="widefat" id="rss-url-<?php echo $esc_number; ?>" name="widget-rss[<?php echo $esc_number; ?>][url]" type="text" value="<?php echo esc_url( $args['url'] ); ?>" /></p> <?php endif; if ( $inputs['title'] ) : ?> <p><label for="rss-title-<?php echo $esc_number; ?>"><?php _e( 'Give the feed a title (optional):' ); ?></label> <input class="widefat" id="rss-title-<?php echo $esc_number; ?>" name="widget-rss[<?php echo $esc_number; ?>][title]" type="text" value="<?php echo esc_attr( $args['title'] ); ?>" /></p> <?php endif; if ( $inputs['items'] ) : ?> <p><label for="rss-items-<?php echo $esc_number; ?>"><?php _e( 'How many items would you like to display?' ); ?></label> <select id="rss-items-<?php echo $esc_number; ?>" name="widget-rss[<?php echo $esc_number; ?>][items]"> <?php for ( $i = 1; $i <= 20; ++$i ) { echo "<option value='$i' " . selected( $args['items'], $i, false ) . ">$i</option>"; } ?> </select></p> <?php endif; if ( $inputs['show_summary'] || $inputs['show_author'] || $inputs['show_date'] ) : ?> <p> <?php if ( $inputs['show_summary'] ) : ?> <input id="rss-show-summary-<?php echo $esc_number; ?>" name="widget-rss[<?php echo $esc_number; ?>][show_summary]" type="checkbox" value="1" <?php checked( $args['show_summary'] ); ?> /> <label for="rss-show-summary-<?php echo $esc_number; ?>"><?php _e( 'Display item content?' ); ?></label><br /> <?php endif; if ( $inputs['show_author'] ) : ?> <input id="rss-show-author-<?php echo $esc_number; ?>" name="widget-rss[<?php echo $esc_number; ?>][show_author]" type="checkbox" value="1" <?php checked( $args['show_author'] ); ?> /> <label for="rss-show-author-<?php echo $esc_number; ?>"><?php _e( 'Display item author if available?' ); ?></label><br /> <?php endif; if ( $inputs['show_date'] ) : ?> <input id="rss-show-date-<?php echo $esc_number; ?>" name="widget-rss[<?php echo $esc_number; ?>][show_date]" type="checkbox" value="1" <?php checked( $args['show_date'] ); ?>/> <label for="rss-show-date-<?php echo $esc_number; ?>"><?php _e( 'Display item date?' ); ?></label><br /> <?php endif; ?> </p> <?php endif; // End of display options. foreach ( array_keys( $default_inputs ) as $input ) : if ( 'hidden' === $inputs[ $input ] ) : $id = str_replace( '_', '-', $input ); ?> <input type="hidden" id="rss-<?php echo esc_attr( $id ); ?>-<?php echo $esc_number; ?>" name="widget-rss[<?php echo $esc_number; ?>][<?php echo esc_attr( $input ); ?>]" value="<?php echo esc_attr( $args[ $input ] ); ?>" /> <?php endif; endforeach; } /** * Process RSS feed widget data and optionally retrieve feed items. * * The feed widget can not have more than 20 items or it will reset back to the * default, which is 10. * * The resulting array has the feed title, feed url, feed link (from channel), * feed items, error (if any), and whether to show summary, author, and date. * All respectively in the order of the array elements. * * @since 2.5.0 * * @param array $widget_rss RSS widget feed data. Expects unescaped data. * @param bool $check_feed Optional. Whether to check feed for errors. Default true. * @return array */ function wp_widget_rss_process( $widget_rss, $check_feed = true ) { $items = (int) $widget_rss['items']; if ( $items < 1 || 20 < $items ) { $items = 10; } $url = esc_url_raw( strip_tags( $widget_rss['url'] ) ); $title = isset( $widget_rss['title'] ) ? trim( strip_tags( $widget_rss['title'] ) ) : ''; $show_summary = isset( $widget_rss['show_summary'] ) ? (int) $widget_rss['show_summary'] : 0; $show_author = isset( $widget_rss['show_author'] ) ? (int) $widget_rss['show_author'] : 0; $show_date = isset( $widget_rss['show_date'] ) ? (int) $widget_rss['show_date'] : 0; if ( $check_feed ) { $rss = fetch_feed( $url ); $error = false; $link = ''; if ( is_wp_error( $rss ) ) { $error = $rss->get_error_message(); } else { $link = esc_url( strip_tags( $rss->get_permalink() ) ); while ( stristr( $link, 'http' ) !== $link ) { $link = substr( $link, 1 ); } $rss->__destruct(); unset( $rss ); } } return compact( 'title', 'url', 'link', 'items', 'error', 'show_summary', 'show_author', 'show_date' ); } /** * Registers all of the default WordPress widgets on startup. * * Calls {@see 'widgets_init'} action after all of the WordPress widgets have been registered. * * @since 2.2.0 */ function wp_widgets_init() { if ( ! is_blog_installed() ) { return; } register_widget( 'WP_Widget_Pages' ); register_widget( 'WP_Widget_Calendar' ); register_widget( 'WP_Widget_Archives' ); if ( get_option( 'link_manager_enabled' ) ) { register_widget( 'WP_Widget_Links' ); } register_widget( 'WP_Widget_Media_Audio' ); register_widget( 'WP_Widget_Media_Image' ); register_widget( 'WP_Widget_Media_Gallery' ); register_widget( 'WP_Widget_Media_Video' ); register_widget( 'WP_Widget_Meta' ); register_widget( 'WP_Widget_Search' ); register_widget( 'WP_Widget_Text' ); register_widget( 'WP_Widget_Categories' ); register_widget( 'WP_Widget_Recent_Posts' ); register_widget( 'WP_Widget_Recent_Comments' ); register_widget( 'WP_Widget_RSS' ); register_widget( 'WP_Widget_Tag_Cloud' ); register_widget( 'WP_Nav_Menu_Widget' ); register_widget( 'WP_Widget_Custom_HTML' ); register_widget( 'WP_Widget_Block' ); /** * Fires after all default WordPress widgets have been registered. * * @since 2.2.0 */ do_action( 'widgets_init' ); } /** * Enables the widgets block editor. This is hooked into 'after_setup_theme' so * that the block editor is enabled by default but can be disabled by themes. * * @since 5.8.0 * * @access private */ function wp_setup_widgets_block_editor() { add_theme_support( 'widgets-block-editor' ); } /** * Whether or not to use the block editor to manage widgets. Defaults to true * unless a theme has removed support for widgets-block-editor or a plugin has * filtered the return value of this function. * * @since 5.8.0 * * @return boolean Whether or not to use the block editor to manage widgets. */ function wp_use_widgets_block_editor() { /** * Filters whether or not to use the block editor to manage widgets. * * @since 5.8.0 * * @param boolean $use_widgets_block_editor Whether or not to use the block editor to manage widgets. */ return apply_filters( 'use_widgets_block_editor', get_theme_support( 'widgets-block-editor' ) ); } /** * Converts a widget ID into its id_base and number components. * * @since 5.8.0 * * @param string $id Widget ID. * @return array Array containing a widget's id_base and number components. */ function wp_parse_widget_id( $id ) { $parsed = array(); if ( preg_match( '/^(.+)-(\d+)$/', $id, $matches ) ) { $parsed['id_base'] = $matches[1]; $parsed['number'] = (int) $matches[2]; } else { // Likely an old single widget. $parsed['id_base'] = $id; } return $parsed; } /** * Finds the sidebar that a given widget belongs to. * * @since 5.8.0 * * @param string $widget_id The widget id to look for. * @return string|null The found sidebar's id, or null if it was not found. */ function wp_find_widgets_sidebar( $widget_id ) { foreach ( wp_get_sidebars_widgets() as $sidebar_id => $widget_ids ) { foreach ( $widget_ids as $maybe_widget_id ) { if ( $maybe_widget_id === $widget_id ) { return (string) $sidebar_id; } } } return null; } /** * Assigns a widget to the given sidebar. * * @since 5.8.0 * * @param string $widget_id The widget id to assign. * @param string $sidebar_id The sidebar id to assign to. If empty, the widget won't be added to any sidebar. */ function wp_assign_widget_to_sidebar( $widget_id, $sidebar_id ) { $sidebars = wp_get_sidebars_widgets(); foreach ( $sidebars as $maybe_sidebar_id => $widgets ) { foreach ( $widgets as $i => $maybe_widget_id ) { if ( $widget_id === $maybe_widget_id && $sidebar_id !== $maybe_sidebar_id ) { unset( $sidebars[ $maybe_sidebar_id ][ $i ] ); // We could technically break 2 here, but continue looping in case the id is duplicated. continue 2; } } } if ( $sidebar_id ) { $sidebars[ $sidebar_id ][] = $widget_id; } wp_set_sidebars_widgets( $sidebars ); } /** * Calls the render callback of a widget and returns the output. * * @since 5.8.0 * * @param string $widget_id Widget ID. * @param string $sidebar_id Sidebar ID. * @return string */ function wp_render_widget( $widget_id, $sidebar_id ) { global $wp_registered_widgets, $wp_registered_sidebars; if ( ! isset( $wp_registered_widgets[ $widget_id ] ) ) { return ''; } if ( isset( $wp_registered_sidebars[ $sidebar_id ] ) ) { $sidebar = $wp_registered_sidebars[ $sidebar_id ]; } elseif ( 'wp_inactive_widgets' === $sidebar_id ) { $sidebar = array(); } else { return ''; } $params = array_merge( array( array_merge( $sidebar, array( 'widget_id' => $widget_id, 'widget_name' => $wp_registered_widgets[ $widget_id ]['name'], ) ), ), (array) $wp_registered_widgets[ $widget_id ]['params'] ); // Substitute HTML `id` and `class` attributes into `before_widget`. $classname_ = ''; foreach ( (array) $wp_registered_widgets[ $widget_id ]['classname'] as $cn ) { if ( is_string( $cn ) ) { $classname_ .= '_' . $cn; } elseif ( is_object( $cn ) ) { $classname_ .= '_' . get_class( $cn ); } } $classname_ = ltrim( $classname_, '_' ); $params[0]['before_widget'] = sprintf( $params[0]['before_widget'], $widget_id, $classname_ ); /** This filter is documented in wp-includes/widgets.php */ $params = apply_filters( 'dynamic_sidebar_params', $params ); $callback = $wp_registered_widgets[ $widget_id ]['callback']; ob_start(); /** This filter is documented in wp-includes/widgets.php */ do_action( 'dynamic_sidebar', $wp_registered_widgets[ $widget_id ] ); if ( is_callable( $callback ) ) { call_user_func_array( $callback, $params ); } return ob_get_clean(); } /** * Calls the control callback of a widget and returns the output. * * @since 5.8.0 * * @param string $id Widget ID. * @return string|null */ function wp_render_widget_control( $id ) { global $wp_registered_widget_controls; if ( ! isset( $wp_registered_widget_controls[ $id ]['callback'] ) ) { return null; } $callback = $wp_registered_widget_controls[ $id ]['callback']; $params = $wp_registered_widget_controls[ $id ]['params']; ob_start(); if ( is_callable( $callback ) ) { call_user_func_array( $callback, $params ); } return ob_get_clean(); } /** * Displays a _doing_it_wrong() message for conflicting widget editor scripts. * * The 'wp-editor' script module is exposed as window.wp.editor. This overrides * the legacy TinyMCE editor module which is required by the widgets editor. * Because of that conflict, these two shouldn't be enqueued together. * See https://core.trac.wordpress.org/ticket/53569. * * There is also another conflict related to styles where the block widgets * editor is hidden if a block enqueues 'wp-edit-post' stylesheet. * See https://core.trac.wordpress.org/ticket/53569. * * @since 5.8.0 * @access private * * @global WP_Scripts $wp_scripts * @global WP_Styles $wp_styles */ function wp_check_widget_editor_deps() { global $wp_scripts, $wp_styles; if ( $wp_scripts->query( 'wp-edit-widgets', 'enqueued' ) || $wp_scripts->query( 'wp-customize-widgets', 'enqueued' ) ) { if ( $wp_scripts->query( 'wp-editor', 'enqueued' ) ) { _doing_it_wrong( 'wp_enqueue_script()', '"wp-editor" script should not be enqueued together with the new widgets editor (wp-edit-widgets or wp-customize-widgets).', '5.8.0' ); } if ( $wp_styles->query( 'wp-edit-post', 'enqueued' ) ) { _doing_it_wrong( 'wp_enqueue_style()', '"wp-edit-post" style should not be enqueued together with the new widgets editor (wp-edit-widgets or wp-customize-widgets).', '5.8.0' ); } } }