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widgets.php
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<?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://codex.wordpress.org/Plugins/WordPress_Widgets WordPress Widgets
* @link https://codex.wordpress.org/Plugins/WordPress_Widgets_Api Widgets API
*
* @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
* @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 control (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
*
* @see WP_Widget
*
* @global WP_Widget_Factory $wp_widget_factory
*
* @param string $widget_class The name of a class that extends WP_Widget
*/
function register_widget($widget_class) {
global $wp_widget_factory;
$wp_widget_factory->register($widget_class);
}
/**
* 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
*
* @see WP_Widget
*
* @global WP_Widget_Factory $wp_widget_factory
*
* @param string $widget_class The name of a class that extends WP_Widget.
*/
function unregister_widget($widget_class) {
global $wp_widget_factory;
$wp_widget_factory->unregister($widget_class);
}
/**
* 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' => '<li id="%1$s" class="widget %2$s">',
'after_widget' => "</li>\n",
'before_title' => '<h2 class="widgettitle">',
'after_title' => "</h2>\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.' ), '<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 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_register_widget_defaults Retrieves widget defaults.
* @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 esc_html( $wp_registered_sidebars[$id]['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
*
* @param array $sidebars_widgets Sidebar widgets and their settings.
*/
function wp_set_sidebars_widgets( $sidebars_widgets ) {
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;
}
}
}