<?php
/**
- * API for creating dynamic sidebar without hardcoding functionality into
- * themes. Includes both internal WordPress routines and theme use routines.
+ * Core Widgets API
*
- * This functionality was found in a plugin before WordPress 2.2 release which
- * included it in the core from that point on.
+ * This API is used for creating dynamic sidebar without hardcoding functionality into
+ * themes
*
- * @link http://codex.wordpress.org/Plugins/WordPress_Widgets WordPress Widgets
- * @link http://codex.wordpress.org/Plugins/WordPress_Widgets_Api Widgets API
+ * Includes both internal WordPress routines and theme-use routines.
*
- * @package WordPress
- * @subpackage Widgets
- */
-
-/**
- * This class must be extended for each widget and WP_Widget::widget(), WP_Widget::update()
- * and WP_Widget::form() need to be over-ridden.
+ * This functionality was found in a plugin before the WordPress 2.2 release, which
+ * included it in the core from that point on.
*
- * @package WordPress
- * @subpackage Widgets
- * @since 2.8
- */
-class WP_Widget {
-
- var $id_base; // Root id for all widgets of this type.
- var $name; // Name for this widget type.
- var $widget_options; // Option array passed to wp_register_sidebar_widget()
- var $control_options; // Option array passed to wp_register_widget_control()
-
- var $number = false; // Unique ID number of the current instance.
- var $id = false; // Unique ID string of the current instance (id_base-number)
- var $updated = false; // Set true when we update the data after a POST submit - makes sure we don't do it twice.
-
- // Member functions that you must over-ride.
-
- /** Echo the widget content.
- *
- * Subclasses should over-ride this function to generate their widget code.
- *
- * @param array $args Display arguments including before_title, after_title, before_widget, and after_widget.
- * @param array $instance The settings for the particular instance of the widget
- */
- function widget($args, $instance) {
- die('function WP_Widget::widget() must be over-ridden in a sub-class.');
- }
-
- /** Update a particular instance.
- *
- * This function should check that $new_instance is set correctly.
- * The newly calculated value of $instance should be returned.
- * If "false" is returned, the instance won't be saved/updated.
- *
- * @param array $new_instance New settings for this instance as input by the user via form()
- * @param array $old_instance Old settings for this instance
- * @return array Settings to save or bool false to cancel saving
- */
- function update($new_instance, $old_instance) {
- return $new_instance;
- }
-
- /** Echo the settings update form
- *
- * @param array $instance Current settings
- */
- function form($instance) {
- echo '<p class="no-options-widget">' . __('There are no options for this widget.') . '</p>';
- return 'noform';
- }
-
- // Functions you'll need to call.
-
- /**
- * PHP4 constructor
- */
- function WP_Widget( $id_base = false, $name, $widget_options = array(), $control_options = array() ) {
- WP_Widget::__construct( $id_base, $name, $widget_options, $control_options );
- }
-
- /**
- * PHP5 constructor
- *
- * @param string $id_base Optional Base ID for the widget, lower case,
- * if left empty a portion of the widget's class name will be used. Has to be unique.
- * @param string $name Name for the widget displayed on the configuration page.
- * @param array $widget_options Optional Passed to wp_register_sidebar_widget()
- * - description: shown on the configuration page
- * - classname
- * @param array $control_options Optional Passed to wp_register_widget_control()
- * - width: required if more than 250px
- * - height: currently not used but may be needed in the future
- */
- function __construct( $id_base = false, $name, $widget_options = array(), $control_options = array() ) {
- $this->id_base = empty($id_base) ? preg_replace( '/(wp_)?widget_/', '', strtolower(get_class($this)) ) : strtolower($id_base);
- $this->name = $name;
- $this->option_name = 'widget_' . $this->id_base;
- $this->widget_options = wp_parse_args( $widget_options, array('classname' => $this->option_name) );
- $this->control_options = wp_parse_args( $control_options, array('id_base' => $this->id_base) );
- }
-
- /**
- * Constructs name attributes for use in form() fields
- *
- * This function should be used in form() methods to create name attributes for fields to be saved by update()
- *
- * @param string $field_name Field name
- * @return string Name attribute for $field_name
- */
- function get_field_name($field_name) {
- return 'widget-' . $this->id_base . '[' . $this->number . '][' . $field_name . ']';
- }
-
- /**
- * Constructs id attributes for use in form() fields
- *
- * This function should be used in form() methods to create id attributes for fields to be saved by update()
- *
- * @param string $field_name Field name
- * @return string ID attribute for $field_name
- */
- function get_field_id($field_name) {
- return 'widget-' . $this->id_base . '-' . $this->number . '-' . $field_name;
- }
-
- // Private Functions. Don't worry about these.
-
- function _register() {
- $settings = $this->get_settings();
- $empty = true;
-
- if ( is_array($settings) ) {
- foreach ( array_keys($settings) as $number ) {
- if ( is_numeric($number) ) {
- $this->_set($number);
- $this->_register_one($number);
- $empty = false;
- }
- }
- }
-
- if ( $empty ) {
- // If there are none, we register the widget's existence with a
- // generic template
- $this->_set(1);
- $this->_register_one();
- }
- }
-
- function _set($number) {
- $this->number = $number;
- $this->id = $this->id_base . '-' . $number;
- }
-
- function _get_display_callback() {
- return array(&$this, 'display_callback');
- }
-
- function _get_update_callback() {
- return array(&$this, 'update_callback');
- }
-
- function _get_form_callback() {
- return array(&$this, 'form_callback');
- }
-
- /** Generate the actual widget content.
- * Just finds the instance and calls widget().
- * Do NOT over-ride this function. */
- function display_callback( $args, $widget_args = 1 ) {
- if ( is_numeric($widget_args) )
- $widget_args = array( 'number' => $widget_args );
-
- $widget_args = wp_parse_args( $widget_args, array( 'number' => -1 ) );
- $this->_set( $widget_args['number'] );
- $instance = $this->get_settings();
-
- if ( array_key_exists( $this->number, $instance ) ) {
- $instance = $instance[$this->number];
- // filters the widget's settings, return false to stop displaying the widget
- $instance = apply_filters('widget_display_callback', $instance, $this, $args);
- if ( false !== $instance )
- $this->widget($args, $instance);
- }
- }
-
- /** Deal with changed settings.
- * Do NOT over-ride this function. */
- function update_callback( $widget_args = 1 ) {
- global $wp_registered_widgets;
-
- if ( is_numeric($widget_args) )
- $widget_args = array( 'number' => $widget_args );
-
- $widget_args = wp_parse_args( $widget_args, array( 'number' => -1 ) );
- $all_instances = $this->get_settings();
-
- // We need to update the data
- if ( $this->updated )
- return;
-
- $sidebars_widgets = wp_get_sidebars_widgets();
-
- if ( isset($_POST['delete_widget']) && $_POST['delete_widget'] ) {
- // Delete the settings for this instance of the widget
- if ( isset($_POST['the-widget-id']) )
- $del_id = $_POST['the-widget-id'];
- else
- return;
-
- if ( isset($wp_registered_widgets[$del_id]['params'][0]['number']) ) {
- $number = $wp_registered_widgets[$del_id]['params'][0]['number'];
-
- if ( $this->id_base . '-' . $number == $del_id )
- unset($all_instances[$number]);
- }
- } else {
- if ( isset($_POST['widget-' . $this->id_base]) && is_array($_POST['widget-' . $this->id_base]) ) {
- $settings = $_POST['widget-' . $this->id_base];
- } elseif ( isset($_POST['id_base']) && $_POST['id_base'] == $this->id_base ) {
- $num = $_POST['multi_number'] ? (int) $_POST['multi_number'] : (int) $_POST['widget_number'];
- $settings = array( $num => array() );
- } else {
- return;
- }
-
- foreach ( $settings as $number => $new_instance ) {
- $new_instance = stripslashes_deep($new_instance);
- $this->_set($number);
-
- $old_instance = isset($all_instances[$number]) ? $all_instances[$number] : array();
-
- $instance = $this->update($new_instance, $old_instance);
-
- // filters the widget's settings before saving, return false to cancel saving (keep the old settings if updating)
- $instance = apply_filters('widget_update_callback', $instance, $new_instance, $old_instance, $this);
- if ( false !== $instance )
- $all_instances[$number] = $instance;
-
- break; // run only once
- }
- }
-
- $this->save_settings($all_instances);
- $this->updated = true;
- }
-
- /** Generate the control form.
- * Do NOT over-ride this function. */
- function form_callback( $widget_args = 1 ) {
- if ( is_numeric($widget_args) )
- $widget_args = array( 'number' => $widget_args );
-
- $widget_args = wp_parse_args( $widget_args, array( 'number' => -1 ) );
- $all_instances = $this->get_settings();
-
- if ( -1 == $widget_args['number'] ) {
- // We echo out a form where 'number' can be set later
- $this->_set('__i__');
- $instance = array();
- } else {
- $this->_set($widget_args['number']);
- $instance = $all_instances[ $widget_args['number'] ];
- }
-
- // filters the widget admin form before displaying, return false to stop displaying it
- $instance = apply_filters('widget_form_callback', $instance, $this);
-
- $return = null;
- if ( false !== $instance ) {
- $return = $this->form($instance);
- // add extra fields in the widget form - be sure to set $return to null if you add any
- // if the widget has no form the text echoed from the default form method can be hidden using css
- do_action_ref_array( 'in_widget_form', array(&$this, &$return, $instance) );
- }
- return $return;
- }
-
- /** Helper function: Registers a single instance. */
- function _register_one($number = -1) {
- wp_register_sidebar_widget( $this->id, $this->name, $this->_get_display_callback(), $this->widget_options, array( 'number' => $number ) );
- _register_widget_update_callback( $this->id_base, $this->_get_update_callback(), $this->control_options, array( 'number' => -1 ) );
- _register_widget_form_callback( $this->id, $this->name, $this->_get_form_callback(), $this->control_options, array( 'number' => $number ) );
- }
-
- function save_settings($settings) {
- $settings['_multiwidget'] = 1;
- update_option( $this->option_name, $settings );
- }
-
- function get_settings() {
- $settings = get_option($this->option_name);
-
- if ( false === $settings && isset($this->alt_option_name) )
- $settings = get_option($this->alt_option_name);
-
- if ( !is_array($settings) )
- $settings = array();
-
- if ( !empty($settings) && !array_key_exists('_multiwidget', $settings) ) {
- // old format, convert if single widget
- $settings = wp_convert_widget_settings($this->id_base, $this->option_name, $settings);
- }
-
- unset($settings['_multiwidget'], $settings['__i__']);
- return $settings;
- }
-}
-
-/**
- * Singleton that registers and instantiates WP_Widget classes.
+ * @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 2.8
+ * @since 2.2.0
*/
-class WP_Widget_Factory {
- var $widgets = array();
-
- function WP_Widget_Factory() {
- add_action( 'widgets_init', array( &$this, '_register_widgets' ), 100 );
- }
-
- function register($widget_class) {
- $this->widgets[$widget_class] = new $widget_class();
- }
-
- function unregister($widget_class) {
- if ( isset($this->widgets[$widget_class]) )
- unset($this->widgets[$widget_class]);
- }
-
- function _register_widgets() {
- global $wp_registered_widgets;
- $keys = array_keys($this->widgets);
- $registered = array_keys($wp_registered_widgets);
- $registered = array_map('_get_widget_id_base', $registered);
-
- foreach ( $keys as $key ) {
- // don't register new widget if old widget with the same id is already registered
- if ( in_array($this->widgets[$key]->id_base, $registered, true) ) {
- unset($this->widgets[$key]);
- continue;
- }
-
- $this->widgets[$key]->_register();
- }
- }
-}
-/* Global Variables */
+//
+// Global Variables
+//
/** @ignore */
global $wp_registered_sidebars, $wp_registered_widgets, $wp_registered_widget_controls, $wp_registered_widget_updates;
* @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
*/
- $GLOBALS['_wp_deprecated_widgets_callbacks'] = array(
- 'wp_widget_pages',
+$GLOBALS['_wp_deprecated_widgets_callbacks'] = array(
+ 'wp_widget_pages',
'wp_widget_pages_control',
'wp_widget_calendar',
'wp_widget_calendar_control',
'wp_widget_rss_control',
'wp_widget_recent_comments',
'wp_widget_recent_comments_control'
- );
+);
-/* Template tags & API functions */
+//
+// Template tags & API functions
+//
/**
* Register a widget
* @since 2.8.0
*
* @see WP_Widget
- * @see WP_Widget_Factory
- * @uses WP_Widget_Factory
+ *
+ * @global WP_Widget_Factory $wp_widget_factory
*
* @param string $widget_class The name of a class that extends WP_Widget
*/
}
/**
- * Unregister a widget
+ * Unregisters a widget.
*
- * Unregisters a WP_Widget widget. Useful for unregistering default widgets.
- * Run within a function hooked to the widgets_init action.
+ * 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
- * @see WP_Widget_Factory
- * @uses WP_Widget_Factory
*
- * @param string $widget_class The name of a class that extends 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;
*
* 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 $args, then they will be built for you.
- *
- * The default for the name is "Sidebar #", with '#' being replaced with the
- * number the sidebar is currently when greater than one. If first sidebar, the
- * name will be just "Sidebar". The default for id is "sidebar-" followed by the
- * number the sidebar creation is currently at. If the id is provided, and multiple
- * sidebars are being defined, the id will have "-2" appended, and so on.
+ * 'id' in `$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.
- * @uses parse_str() Converts a string to an array to be used in the rest of the function.
- * @uses register_sidebar() Sends single sidebar information [name, id] to this
- * function to handle building the sidebar.
*
- * @param int $number Number of sidebars to create.
- * @param string|array $args Builds Sidebar based off of 'name' and 'id' values.
+ * @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()) {
+function register_sidebars( $number = 1, $args = array() ) {
global $wp_registered_sidebars;
$number = (int) $number;
if ( isset($args['id']) ) {
$_args['id'] = $args['id'];
$n = 2; // Start at -2 for conflicting custom ID's
- while ( isset($wp_registered_sidebars[$_args['id']]) )
+ while ( is_registered_sidebar( $_args['id'] ) ) {
$_args['id'] = $args['id'] . '-' . $n++;
+ }
} else {
- $n = count($wp_registered_sidebars);
+ $n = count( $wp_registered_sidebars );
do {
$_args['id'] = 'sidebar-' . ++$n;
- } while ( isset($wp_registered_sidebars[$_args['id']]) );
+ } while ( is_registered_sidebar( $_args['id'] ) );
}
register_sidebar($_args);
}
/**
* Builds the definition for a single sidebar and returns the ID.
*
- * The $args parameter takes either a string or an array with 'name' and 'id'
- * contained in either usage. It will be noted that the values will be applied
- * to all sidebars, so if creating more than one, it will be advised to allow
- * for WordPress to create the defaults for you.
- *
- * Example for string would be <code>'name=whatever;id=whatever1'</code> and for
- * the array it would be <code>array(
- * 'name' => 'whatever',
- * 'id' => 'whatever1')</code>.
- *
- * name - The name of the sidebar, which presumably the title which will be
- * displayed.
- * id - The unique identifier by which the sidebar will be called by.
- * before_widget - The content that will prepended to the widgets when they are
- * displayed.
- * after_widget - The content that will be appended to the widgets when they are
- * displayed.
- * before_title - The content that will be prepended to the title when displayed.
- * after_title - the content that will be appended to the title when displayed.
- *
- * <em>Content</em> is assumed to be HTML and should be formatted as such, but
- * doesn't have to be.
+ * 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
- * @uses $wp_registered_sidebars Stores the new sidebar in this array by sidebar ID.
*
- * @param string|array $args Builds Sidebar based off of 'name' and 'id' values
- * @return string The sidebar id that was added.
+ * @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",
$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'];
*
* @since 2.2.0
*
- * @uses $wp_registered_sidebars Stores the new sidebar in this array by sidebar ID.
+ * @global array $wp_registered_sidebars Stores the new sidebar in this array by sidebar ID.
*
* @param string $name The ID of the sidebar when it was added.
*/
function unregister_sidebar( $name ) {
global $wp_registered_sidebars;
- if ( isset( $wp_registered_sidebars[$name] ) )
- unset( $wp_registered_sidebars[$name] );
+ unset( $wp_registered_sidebars[ $name ] );
+}
+
+/**
+ * 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 widget for use in sidebars.
+ * Register an instance of a widget.
*
- * The default widget option is 'classname' that can be override.
+ * The default widget option is 'classname' that can be overridden.
*
- * The function can also be used to unregister widgets when $output_callback
+ * The function can also be used to un-register widgets when `$output_callback`
* parameter is an empty string.
*
* @since 2.2.0
*
- * @uses $wp_registered_widgets Uses stored registered widgets.
- * @uses $wp_register_widget_defaults Retrieves widget defaults.
- *
- * @param int|string $id Widget ID.
- * @param string $name Widget display title.
- * @param callback $output_callback Run when widget is called.
- * @param array|string $options Optional. Widget Options.
- * @param mixed $params,... Widget parameters to add to widget.
- * @return null Will return if $output_callback is empty after removing widget.
+ * @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()) {
+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);
$id_base = _get_widget_id_base($id);
if ( in_array($output_callback, $_wp_deprecated_widgets_callbacks, true) && !is_callable($output_callback) ) {
- if ( isset($wp_registered_widget_controls[$id]) )
- unset($wp_registered_widget_controls[$id]);
-
- if ( isset($wp_registered_widget_updates[$id_base]) )
- unset($wp_registered_widget_updates[$id_base]);
-
+ unset( $wp_registered_widget_controls[ $id ] );
+ unset( $wp_registered_widget_updates[ $id_base ] );
return;
}
$widget = array_merge($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;
}
*
* @since 2.5.0
*
+ * @global array $wp_registered_widgets
+ *
* @param int|string $id Widget ID.
- * @return string Widget description, if available. Null on failure to retrieve description.
+ * @return string|void Widget description, if available.
*/
function wp_widget_description( $id ) {
if ( !is_scalar($id) )
*
* @since 2.9.0
*
- * @param int|string $id sidebar ID.
- * @return string Sidebar description, if available. Null on failure to retrieve description.
+ * @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 esc_html( $wp_registered_sidebars[$id]['description'] );
}
-
/**
* Remove widget from sidebar.
*
* @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, '', '');
/**
* Registers widget control callback for customizing options.
*
- * The options contains the 'height', 'width', and 'id_base' keys. The 'height'
- * option is never used. The 'width' option is the width of the fully expanded
- * control form, but try hard to use the default width. The 'id_base' is for
- * multi-widgets (widgets which allow multiple instances such as the text
- * widget), an id_base must be provided. The widget id will end up looking like
- * {$id_base}-{$unique_number}.
- *
* @since 2.2.0
*
- * @param int|string $id Sidebar ID.
- * @param string $name Sidebar display name.
- * @param callback $control_callback Run when sidebar is displayed.
- * @param array|string $options Optional. Widget options. See above long description.
- * @param mixed $params,... Optional. Additional parameters to add to widget.
+ * @todo `$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()) {
+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);
}
if ( in_array($control_callback, $_wp_deprecated_widgets_callbacks, true) && !is_callable($control_callback) ) {
- if ( isset($wp_registered_widgets[$id]) )
- unset($wp_registered_widgets[$id]);
-
+ unset( $wp_registered_widgets[ $id ] );
return;
}
$wp_registered_widget_updates[$id_base] = $widget;
}
-function _register_widget_update_callback($id_base, $update_callback, $options = array()) {
+/**
+ * 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]) ) {
$wp_registered_widget_updates[$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;
* Remove control callback for widget.
*
* @since 2.2.0
- * @uses wp_register_widget_control() Unregisters by using empty callback.
*
* @param int|string $id Widget ID.
*/
function wp_unregister_widget_control($id) {
- return wp_register_widget_control($id, '', '');
+ wp_register_widget_control( $id, '', '' );
}
/**
* Display dynamic sidebar.
*
- * By default it displays the default sidebar or 'sidebar-1'. The 'sidebar-1' is
- * not named by the theme, the actual name is '1', but 'sidebar-' is added to
- * the registered sidebars for the name. If you named your sidebar 'after-post',
- * then the parameter $index will still be 'after-post', but the lookup will be
- * for 'sidebar-after-post'.
- *
- * It is confusing for the $index parameter, but just know that it should just
- * work. When you register the sidebar in the theme, you will use the same name
- * for this function or "Pay no heed to the man behind the curtain." Just accept
- * it as an oddity of WordPress sidebar register and display.
+ * 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
*
- * @param int|string $index Optional, default is 1. Name or ID of dynamic sidebar.
+ * @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) {
+function dynamic_sidebar( $index = 1 ) {
global $wp_registered_sidebars, $wp_registered_widgets;
- if ( is_int($index) ) {
+ if ( is_int( $index ) ) {
$index = "sidebar-$index";
} else {
- $index = sanitize_title($index);
+ $index = sanitize_title( $index );
foreach ( (array) $wp_registered_sidebars as $key => $value ) {
- if ( sanitize_title($value['name']) == $index ) {
+ if ( sanitize_title( $value['name'] ) == $index ) {
$index = $key;
break;
}
}
$sidebars_widgets = wp_get_sidebars_widgets();
- if ( empty( $sidebars_widgets ) )
- return false;
-
- if ( empty($wp_registered_sidebars[$index]) || !array_key_exists($index, $sidebars_widgets) || !is_array($sidebars_widgets[$index]) || empty($sidebars_widgets[$index]) )
- return false;
+ 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;
$classname_ = ltrim($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'];
- do_action( 'dynamic_sidebar', $wp_registered_widgets[$id] );
+ /**
+ * 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);
}
}
- return $did_one;
+ /**
+ * 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.
+ * Whether widget is displayed on the front end.
*
* Either $callback or $id_base can be used
* $id_base is the first argument when extending WP_Widget class
* the widget with that callback/$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 'init' or later.
+ * this function has to run after widgets have initialized, at action {@see 'init'} or later.
*
* @since 2.2.0
*
- * @param string $callback Optional, Widget callback to check.
- * @param int $widget_id Optional, but needed for checking. Widget ID.
- * @param string $id_base Optional, the base ID of a widget created by extending WP_Widget.
- * @param bool $skip_inactive Optional, whether to check in 'wp_inactive_widgets'.
- * @return mixed false if widget is not active or id of sidebar in which the widget is active.
+ * @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) {
+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 )
+ if ( $skip_inactive && ( 'wp_inactive_widgets' === $sidebar || 'orphaned_widgets' === substr( $sidebar, 0, 16 ) ) ) {
continue;
+ }
if ( is_array($widgets) ) {
foreach ( $widgets as $widget ) {
*
* @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 => $sidebar ) {
- if ( count($sidebars_widgets[$index]) ) {
+ if ( ! empty( $sidebars_widgets[ $index ] ) ) {
foreach ( (array) $sidebars_widgets[$index] as $widget )
if ( array_key_exists($widget, $wp_registered_widgets) )
return true;
/**
* Whether a sidebar is in use.
*
- * @since 2.8
+ * @since 2.8.0
*
- * @param mixed $index Sidebar name, id or number to check.
+ * @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);
$sidebars_widgets = wp_get_sidebars_widgets();
- if ( !empty($sidebars_widgets[$index]) )
- return true;
+ $is_active_sidebar = ! empty( $sidebars_widgets[$index] );
- return false;
+ /**
+ * 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 */
+//
+// Internal Functions
+//
/**
- * Retrieve full list of sidebars and their widgets.
+ * 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
*
- * @param bool $deprecated Not used (deprecated).
+ * @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) {
+function wp_get_sidebars_widgets( $deprecated = true ) {
if ( $deprecated !== true )
_deprecated_argument( __FUNCTION__, '2.8.1' );
- global $wp_registered_widgets, $_wp_sidebars_widgets, $sidebars_widgets;
+ 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_array( $sidebars_widgets ) && isset($sidebars_widgets['array_version']) )
unset($sidebars_widgets['array_version']);
- $sidebars_widgets = apply_filters('sidebars_widgets', $sidebars_widgets);
- return $sidebars_widgets;
+ /**
+ * 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 );
}
/**
* @since 2.2.0
* @access private
*
+ * @global array $wp_registered_sidebars
+ *
* @return array
*/
function wp_get_widget_defaults() {
*
* @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) {
}
/**
- * Output an arbitrary widget as a template tag
+ * Output an arbitrary widget as a template tag.
*
- * @since 2.8
+ * @since 2.8.0
*
- * @param string $widget the widget's PHP class name (see default-widgets.php)
- * @param array $instance the widget's instance settings
- * @param array $args the widget's sidebar args
- * @return void
- **/
-function the_widget($widget, $instance = array(), $args = array()) {
+ * @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;
$widget_obj = $wp_widget_factory->widgets[$widget];
- if ( !is_a($widget_obj, 'WP_Widget') )
+ if ( ! ( $widget_obj instanceof WP_Widget ) ) {
return;
+ }
- $before_widget = sprintf('<div class="widget %s">', $widget_obj->widget_options['classname'] );
- $default_args = array( 'before_widget' => $before_widget, 'after_widget' => "</div>", 'before_title' => '<h2 class="widgettitle">', 'after_title' => '</h2>' );
+ $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'] );
- $args = wp_parse_args($args, $default_args);
$instance = wp_parse_args($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);
}
/**
- * Private
+ * 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) {
+function _get_widget_id_base( $id ) {
return preg_replace( '/-[0-9]+$/', '', $id );
}
* Handle sidebars config after theme change
*
* @access private
- * @since 3.3
+ * @since 3.3.0
+ *
+ * @global array $sidebars_widgets
*/
function _wp_sidebars_changed() {
global $sidebars_widgets;
retrieve_widgets(true);
}
-// look for "lost" widgets, this has to run at least on each theme change
-function retrieve_widgets($theme_changed = false) {
- global $wp_registered_widget_updates, $wp_registered_sidebars, $sidebars_widgets, $wp_registered_widgets;
+/**
+ * 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|void
+ */
+function retrieve_widgets( $theme_changed = false ) {
+ global $wp_registered_sidebars, $sidebars_widgets, $wp_registered_widgets;
$registered_sidebar_keys = array_keys( $wp_registered_sidebars );
$orphaned = 0;
if ( is_array( $old_sidebars_widgets ) ) {
// time() that sidebars were stored is in $old_sidebars_widgets['time']
$_sidebars_widgets = $old_sidebars_widgets['data'];
- remove_theme_mod( 'sidebars_widgets' );
+
+ if ( 'customize' !== $theme_changed ) {
+ remove_theme_mod( 'sidebars_widgets' );
+ }
foreach ( $_sidebars_widgets as $sidebar => $widgets ) {
- if ( 'wp_inactive_widgets' == $sidebar || 'orphaned_widgets' == substr( $sidebar, 0, 16 ) )
+ if ( 'wp_inactive_widgets' === $sidebar || 'orphaned_widgets' === substr( $sidebar, 0, 16 ) ) {
continue;
+ }
if ( !in_array( $sidebar, $registered_sidebar_keys ) ) {
$_sidebars_widgets['orphaned_widgets_' . ++$orphaned] = $widgets;
}
$sidebars_widgets['wp_inactive_widgets'] = array_merge($lost_widgets, (array) $sidebars_widgets['wp_inactive_widgets']);
- wp_set_sidebars_widgets($sidebars_widgets);
+ if ( 'customize' !== $theme_changed ) {
+ wp_set_sidebars_widgets( $sidebars_widgets );
+ }
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>' . sprintf( __('<strong>RSS Error</strong>: %s'), $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 ( 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>' . sprintf( __( 'RSS Error: %s' ), $args['error'] ) . '</strong></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'] ) : ?>
+ <p><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></p>
+<?php endif; if ( $inputs['show_author'] ) : ?>
+ <p><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></p>
+<?php endif; if ( $inputs['show_date'] ) : ?>
+ <p><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 $esc_number; ?>"><?php _e( 'Display item date?' ); ?></label></p>
+<?php
+ endif;
+ foreach ( array_keys($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, default is true. Whether to check feed for errors.
+ * @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_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');
+
+ /**
+ * Fires after all default WordPress widgets have been registered.
+ *
+ * @since 2.2.0
+ */
+ do_action( 'widgets_init' );
+}
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