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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 * * @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 ) $_args['name'] = isset($args['name']) ? sprintf($args['name'], $i) : 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 ID's 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 * * @global array $wp_registered_sidebars Stores the new sidebar in this array by sidebar ID. * * @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. 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. * } * @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( 'name' => sprintf(__('Sidebar %d'), $i ), 'id' => "sidebar-$i", 'description' => '', 'class' => '', 'before_widget' => '
  • ', 'after_widget' => "
    • \n", 'before_title' => '

    ', 'after_title' => "

    \n", ); $sidebar = wp_parse_args( $args, $defaults ); if ( $id_is_empty ) { /* translators: 1: the id argument, 2: sidebar name, 3: recommended id value */ _doing_it_wrong( __FUNCTION__, sprintf( __( 'No %1$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.' ), 'id', $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 Stores the new sidebar in this array by sidebar ID. * * @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 * * @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. * } */ function wp_register_sidebar_widget( $id, $name, $output_callback, $options = array() ) { 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' => array_slice(func_get_args(), 4) ); $widget = array_merge($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 * * @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($id); } /** * Registers widget control callback for customizing options. * * @since 2.2.0 * * @todo `$params` parameter? * * @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}`. * } */ function wp_register_widget_control( $id, $name, $control_callback, $options = array() ) { 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' => array_slice(func_get_args(), 4) ); $widget = array_merge($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 * * @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. */ function _register_widget_update_callback( $id_base, $update_callback, $options = array() ) { 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' => array_slice(func_get_args(), 3) ); $widget = array_merge($widget, $options); $wp_registered_widget_updates[$id_base] = $widget; } /** * Registers the form callback for a widget. * * @since 2.8.0 * * @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 $options Optional. Widget control options. See wp_register_widget_control(). * Default empty array. */ function _register_widget_form_callback($id, $name, $form_callback, $options = array()) { 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' => array_slice(func_get_args(), 4) ); $widget = array_merge($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 * @global array $wp_registered_widgets * * @param int|string $index Optional, default is 1. Index, name or ID of dynamic sidebar. * @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 ); } /** * 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 ); $sidebar = $wp_registered_sidebars[$index]; $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'], $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_id { * An associative array of widget arguments. * * @type string $name Name of the widget. * @type string $id Widget ID. * @type array|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; } } /** * 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 ); } /** * Whether 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. * * @since 2.2.0 * * @global array $wp_registered_widgets * * @param string|false $callback Optional, Widget callback to check. Default false. * @param int|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 False if widget is not active or id of sidebar in which the widget is 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; } /** * Whether the dynamic sidebar is enabled and used by theme. * * @since 2.2.0 * * @global array $wp_registered_widgets * @global array $wp_registered_sidebars * * @return bool True, if using widgets. False, if not using widgets. */ 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; } /** * Whether a sidebar is in use. * * @since 2.8.0 * * @param string|int $index Sidebar name, id or number to check. * @return bool true if the sidebar is in use, 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 ( $deprecated !== true ) _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 * * @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; } /** * Convert the widget settings from single to multi-widget format. * * @since 2.8.0 * * @global array $_wp_sidebars_widgets * * @param string $base_name * @param string $option_name * @param array $settings * @return array */ function wp_convert_widget_settings($base_name, $option_name, $settings) { // This test may need expanding. $single = $changed = false; if ( empty($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 `
    `, 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 `
    `. * @type string $before_title HTML content that will be prepended to the widget's title when displayed. * Default `

    `. * @type string $after_title HTML content that will be appended to the widget's title when displayed. * Default `

    `. * } */ function the_widget( $widget, $instance = array(), $args = array() ) { global $wp_widget_factory; if ( ! isset( $wp_widget_factory->widgets[ $widget ] ) ) { /* translators: %s: register_widget() */ _doing_it_wrong( __FUNCTION__, sprintf( __( 'Widgets need to be registered using %s, before they can be displayed.' ), 'register_widget()' ), '4.9.0' ); return; } $widget_obj = $wp_widget_factory->widgets[$widget]; if ( ! ( $widget_obj instanceof WP_Widget ) ) { return; } $default_args = array( 'before_widget' => '
    ', 'after_widget' => "
    ", 'before_title' => '

    ', 'after_title' => '

    ', ); $args = wp_parse_args( $args, $default_args ); $args['before_widget'] = sprintf( $args['before_widget'], $widget_obj->widget_options['classname'] ); $instance = wp_parse_args($instance); /** * 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 * @global array $sidebars_widgets * @global array $wp_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 = call_user_func_array( 'array_merge', $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 a whitelist. * * @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 ] ); } else if ( ! 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; } } // endforeach ( $slug_group as $slug ) } // endforeach ( $existing_sidebars_widgets as $sidebar => $widgets ) } // endforeach foreach ( $wp_registered_sidebars as $new_sidebar => $args ) } // endforeach ( $slug_group as $slug ) } // endforeach ( $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 ] ); } } // endif ( $active_key ) } // endforeach ( $old_widgets as $key => $widget_id ) } // endforeach ( $new_sidebars_widgets as $new_sidebar => $new_widgets ) } // endforeach ( $old_sidebars_widgets as $old_sidebar => $old_widgets ) } // endif ( ! 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 a whitelist. * * @since 4.9.0 * * @param array $sidebars_widgets List of sidebars and their widget instance IDs. * @param array $whitelist Optional. List of widget IDs to compare against. Default: Registered widgets. * @return array Sidebars with whitelisted widgets. */ function _wp_remove_unregistered_widgets( $sidebars_widgets, $whitelist = array() ) { if ( empty( $whitelist ) ) { $whitelist = array_keys( $GLOBALS['wp_registered_widgets'] ); } foreach ( $sidebars_widgets as $sidebar => $widgets ) { if ( is_array( $widgets ) ) { $sidebars_widgets[ $sidebar ] = array_intersect( $widgets, $whitelist ); } } 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 '

    ' . __( 'RSS Error:' ) . ' ' . $rss->get_error_message() . '

    '; 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 '
    • ' . __( 'An error has occurred, which probably means the feed is down. Try again later.' ) . '
    '; $rss->__destruct(); unset($rss); return; } echo '
      '; foreach ( $rss->get_items( 0, $items ) as $item ) { $link = $item->get_link(); while ( 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 = '
      ' . esc_html( $summary ) . '
      '; } $date = ''; if ( $show_date ) { $date = $item->get_date( 'U' ); if ( $date ) { $date = ' ' . date_i18n( get_option( 'date_format' ), $date ) . ''; } } $author = ''; if ( $show_author ) { $author = $item->get_author(); if ( is_object($author) ) { $author = $author->get_name(); $author = ' ' . esc_html( strip_tags( $author ) ) . ''; } } if ( $link == '' ) { echo "
    • $title{$date}{$summary}{$author}
      • "; } elseif ( $show_summary ) { echo "
    • $title{$date}{$summary}{$author}
      • "; } else { echo "
    • $title{$date}{$author}
      • "; } } echo '
    '; $rss->__destruct(); unset($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 '

    ' . __( 'RSS Error:' ) . ' ' . $args['error'] . '

    '; } $esc_number = esc_attr( $args['number'] ); if ( $inputs['url'] ) : ?>

    />

    />

    />

    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' ); /** * Fires after all default WordPress widgets have been registered. * * @since 2.2.0 */ do_action( 'widgets_init' ); }