WordPress Pages Dropdown Widget

wp-pages-dropdown-widget.php

/* Pages dropdown widget" */
// Based on WP_Widget_Pages class in /wp-includes/default-widgets.php
class Hearvox_Widget_Pages_Dropdown extends WP_Widget {

    /**
     * Register widget with WordPress.
     */
    function __construct() {
        parent::__construct(
            'hearvox_pages_dropdown', // Base ID
            __( 'Pages Dropdown', 'text_domain' ), // Name
            array( 'description' => __( 'Your site’s Pages in a dropdown menu with a nav button.', 'text_domain' ), ) // Args
        );
    }

    /**
     * Front-end display of widget.
     *
     * @see WP_Widget::widget()
     *
     * @param array $args     Widget arguments.
     * @param array $instance Saved values from database.
     */
    function widget( $args, $instance ) {
        extract( $args );

        $title = apply_filters('widget_title', empty( $instance['title'] ) ? __( 'Pages Dropdown' ) : $instance['title'], $instance, $this->id_base);
        $sortby = empty( $instance['sortby'] ) ? 'menu_order' : $instance['sortby'];
        $exclude = empty( $instance['exclude'] ) ? '' : $instance['exclude'];

        if ( $sortby == 'menu_order' )
            $sortby = 'menu_order, post_title';

        

        $out = '<form action="' . get_bloginfo( 'url' ) . '" method="get">' . "\n";
        $out .= wp_dropdown_pages( array( 'echo' => false, 'sort_column' => $sortby, 'exclude' => $exclude ) );
        $out .= "\n" . '<br /><input type="submit" name="submit" value="Go to Page" />' . "\n" . '</form>';

        if ( !empty( $out ) ) {
            echo $before_widget;
            if ( $title)
                echo $before_title . $title . $after_title;
        ?>
        <ul>
            <?php echo $out; ?>
        </ul>
        <?php
            echo $after_widget;
        }
    }

    /**
     * Sanitize widget form values as they are saved.
     *
     * @see WP_Widget::update()
     *
     * @param array $new_instance Values just sent to be saved.
     * @param array $old_instance Previously saved values from database.
     *
     * @return array Updated safe values to be saved.
     */
    function update( $new_instance, $old_instance ) {
        $instance = $old_instance;
        $instance['title'] = strip_tags( $new_instance['title'] );
        if ( in_array( $new_instance['sortby'], array( 'post_title', 'menu_order', 'ID' ) ) ) {
            $instance['sortby'] = $new_instance['sortby'];
        } else {
            $instance['sortby'] = 'menu_order';
        }

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

        return $instance;
    }

    /**
     * Back-end widget form.
     *
     * @see WP_Widget::form()
     *
     * @param array $instance Previously saved values from database.
     */
    function form( $instance ) {
        //Defaults
        $instance = wp_parse_args( (array) $instance, array( 'sortby' => 'post_title', 'title' => '', 'exclude' => '') );
        $title = esc_attr( $instance['title'] );
        $exclude = esc_attr( $instance['exclude'] );
    ?>
        <p><label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:'); ?></label> <input class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" type="text" value="<?php echo $title; ?>" /></p>
        <p>
            <label for="<?php echo $this->get_field_id('sortby'); ?>"><?php _e( 'Sort by:' ); ?></label>
            <select name="<?php echo $this->get_field_name('sortby'); ?>" id="<?php echo $this->get_field_id('sortby'); ?>" class="widefat">
                <option value="post_title"<?php selected( $instance['sortby'], 'post_title' ); ?>><?php _e('Page title'); ?></option>
                <option value="menu_order"<?php selected( $instance['sortby'], 'menu_order' ); ?>><?php _e('Page order'); ?></option>
                <option value="ID"<?php selected( $instance['sortby'], 'ID' ); ?>><?php _e( 'Page ID' ); ?></option>
            </select>
        </p>
        <p>
            <label for="<?php echo $this->get_field_id('exclude'); ?>"><?php _e( 'Exclude:' ); ?></label> <input type="text" value="<?php echo $exclude; ?>" name="<?php echo $this->get_field_name('exclude'); ?>" id="<?php echo $this->get_field_id('exclude'); ?>" class="widefat" />
            <br />
            <small><?php _e( 'Page IDs, separated by commas.' ); ?></small>
        </p>
<?php
    }

} 

// Register and load the widget
function hearvox_load_widget() {
    register_widget( 'Hearvox_Widget_Pages_Dropdown' );
}
add_action( 'widgets_init', 'hearvox_load_widget' );