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<?php

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/**

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* Widget API: WP_Widget_Pages class

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* @package WordPress

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* @subpackage Widgets

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* @since 4.4.0

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/**

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* Core class used to implement a Pages widget.

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* @since 2.8.0

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* @see WP_Widget

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class WP_Widget_Pages extends WP_Widget {

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/**

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* Sets up a new Pages widget instance.

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* @since 2.8.0

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public function __construct() {

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$widget_ops = array(

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'classname' => 'widget_pages',

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'description' => __( 'A list of your site’s Pages.' ),

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'customize_selective_refresh' => true,

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'show_instance_in_rest' => true,

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);

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parent::__construct( 'pages', __( 'Pages' ), $widget_ops );

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}

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/**

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* Outputs the content for the current Pages widget instance.

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* @since 2.8.0

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* @param array $args Display arguments including 'before_title', 'after_title',

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* 'before_widget', and 'after_widget'.

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* @param array $instance Settings for the current Pages widget instance.

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public function widget( $args, $instance ) {

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$default_title = __( 'Pages' );

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$title = ! empty( $instance['title'] ) ? $instance['title'] : $default_title;

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/**

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* Filters the widget title.

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* @since 2.6.0

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* @param string $title The widget title. Default 'Pages'.

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* @param array $instance Array of settings for the current widget.

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* @param mixed $id_base The widget ID.

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$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );

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$sortby = empty( $instance['sortby'] ) ? 'menu_order' : $instance['sortby'];

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$exclude = empty( $instance['exclude'] ) ? '' : $instance['exclude'];

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if ( 'menu_order' === $sortby ) {

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$sortby = 'menu_order, post_title';

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}

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$output = wp_list_pages(

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/**

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* Filters the arguments for the Pages widget.

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* @since 2.8.0

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* @since 4.9.0 Added the `$instance` parameter.

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* @see wp_list_pages()

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* @param array $args An array of arguments to retrieve the pages list.

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* @param array $instance Array of settings for the current widget.

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apply_filters(

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'widget_pages_args',

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array(

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'title_li' => '',

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'echo' => 0,

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'sort_column' => $sortby,

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'exclude' => $exclude,

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$instance

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)

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);

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if ( ! empty( $output ) ) {

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echo $args['before_widget'];

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if ( $title ) {

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echo $args['before_title'] . $title . $args['after_title'];

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}

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$format = current_theme_supports( 'html5', 'navigation-widgets' ) ? 'html5' : 'xhtml';

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/** This filter is documented in wp-includes/widgets/class-wp-nav-menu-widget.php */

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$format = apply_filters( 'navigation_widgets_format', $format );

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if ( 'html5' === $format ) {

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// The title may be filtered: Strip out HTML and make sure the aria-label is never empty.

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$title = trim( strip_tags( $title ) );

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$aria_label = $title ? $title : $default_title;

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echo '<nav aria-label="' . esc_attr( $aria_label ) . '">';

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}

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<ul>

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<?php echo $output; ?>

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</ul>

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<?php

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if ( 'html5' === $format ) {

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echo '</nav>';

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}

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echo $args['after_widget'];

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}

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}

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/**

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* Handles updating settings for the current Pages widget instance.

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* @since 2.8.0

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* @param array $new_instance New settings for this instance as input by the user via

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* WP_Widget::form().

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* @param array $old_instance Old settings for this instance.

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* @return array Updated settings to save.

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public function update( $new_instance, $old_instance ) {

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$instance = $old_instance;

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$instance['title'] = sanitize_text_field( $new_instance['title'] );

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if ( in_array( $new_instance['sortby'], array( 'post_title', 'menu_order', 'ID' ), true ) ) {

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$instance['sortby'] = $new_instance['sortby'];

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} else {

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$instance['sortby'] = 'menu_order';

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}

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$instance['exclude'] = sanitize_text_field( $new_instance['exclude'] );

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return $instance;

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}

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/**

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* Outputs the settings form for the Pages widget.

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* @since 2.8.0

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* @param array $instance Current settings.

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public function form( $instance ) {

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// Defaults.

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$instance = wp_parse_args(

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(array) $instance,

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array(

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'sortby' => 'post_title',

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'title' => '',

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'exclude' => '',

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)

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);

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<p>

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<label for="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>"><?php _e( 'Title:' ); ?></label>

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<input class="widefat" id="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'title' ) ); ?>" type="text" value="<?php echo esc_attr( $instance['title'] ); ?>" />

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</p>

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<p>

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<label for="<?php echo esc_attr( $this->get_field_id( 'sortby' ) ); ?>"><?php _e( 'Sort by:' ); ?></label>

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<select name="<?php echo esc_attr( $this->get_field_name( 'sortby' ) ); ?>" id="<?php echo esc_attr( $this->get_field_id( 'sortby' ) ); ?>" class="widefat">

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</select>

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</p>

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<p>

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<label for="<?php echo esc_attr( $this->get_field_id( 'exclude' ) ); ?>"><?php _e( 'Exclude:' ); ?></label>

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<input type="text" value="<?php echo esc_attr( $instance['exclude'] ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'exclude' ) ); ?>" id="<?php echo esc_attr( $this->get_field_id( 'exclude' ) ); ?>" class="widefat" />

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<br />

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</p>

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<?php

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}

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}

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