Home WordPress Widgets: Saving a selected value from a listbox
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WordPress Widgets: Saving a selected value from a listbox

John Anderson
1#
John Anderson Published in 2018-01-12 22:45:30Z

I am trying to modify the default Wordpress widget to display post titles. Instead I want to be able to select Custom Post Types. Once I get this working I can modify the fields displayed at the front of the site.

The Widget in the Admin section looks like this.

When I load in the Title and number of posts to show I also check if there is a value for the posttype and if there isn't I assign a default of 'None Selected'.

Unfortunately, everytime I make a selection and press 'Save' the page refreshes with 'None Selected' again. This tells me I'm not saving the posttype.

I use some other script to build a list of public custom post types and this is working fine.

Its just not saving and I think this is because I'm not loading the $instance['fwd_posttype'] with the selected value in the form.

Do you have any ideas that might help?

Thank you, John.

/*

Add new Widget

*/
/**
  * My_Custom_Recent_Posts widget class
  *
  */

class WP_Widget_My_Custom_Recent_Posts extends WP_Widget {

    function WP_Widget_My_Custom_Recent_Posts() {
        $widget_ops = array('classname' => 'widget_my_custom_recent_entries', 'description' => __( "The most recent EVENT posts on your site") );
        $this->WP_Widget('my-custom-recent-posts', __('Recent Event Posts'), $widget_ops);
        $this->alt_option_name = 'widget_my_custom_recent_entries';

        add_action( 'save_post', array(&$this, 'flush_widget_cache') );
        add_action( 'deleted_post', array(&$this, 'flush_widget_cache') );
        add_action( 'switch_theme', array(&$this, 'flush_widget_cache') );
    }

 /*
 Displays outputs on front of website
 */
    function widget($args, $instance) {
        $cache = wp_cache_get('widget_my_custom_recent_posts', 'widget');

        if ( !is_array($cache) )
            $cache = array();

        if ( isset($cache[$args['widget_id']]) ) {
            echo $cache[$args['widget_id']];
            return;
        }

        ob_start();
        extract($args);

        $title = apply_filters('widget_title', empty($instance['title']) ? __('Recent Event Posts') : $instance['title'], $instance, $this->id_base);

        $fwd_posttype = apply_filters('widget_posttype', empty($instance['fwd_posttype']) ? __('Recent Event Posts') : $instance['fwd_posttype'], $instance, $this->id_base);


        if ( !$number = (int) $instance['number'] )
            $number = 10;
        else if ( $number < 1 )
            $number = 1;
        else if ( $number > 15 )
            $number = 15;

        $r = new WP_Query(array('showposts' => $number, 'nopaging' => 0, 'post_status' => 'publish', 'ignore_sticky_posts' => true, 'post_type' => array('events','news')));
        if ($r->have_posts()) :
?>
        <?php echo $before_widget; ?>
        <?php if ( $title ) echo $before_title . $title . $after_title; ?>
        <ul>
        <?php  while ($r->have_posts()) : $r->the_post(); ?>
        <li><a href="<?php the_permalink() ?>" title="<?php echo esc_attr(get_the_title() ? get_the_title() : get_the_ID()); ?>"><?php if ( get_the_title() ) the_title(); else the_ID(); ?></a></li>
        <?php endwhile; ?>
        </ul>
        <?php echo $after_widget; ?>
<?php
        // Reset the global $the_post as this query will have stomped on it
        wp_reset_postdata();

        endif;

        $cache[$args['widget_id']] = ob_get_flush();
        wp_cache_set('widget_my_custom_recent_posts', $cache, 'widget');
    }

    /**
     * Processing widget options on save
     *
     */
    function update( $new_instance, $old_instance ) {
        $instance = $old_instance;
        $instance['title'] = strip_tags($new_instance['title']);
        $instance['fwd_posttype'] = strip_tags($new_instance['fwd_posttype']);
        $instance['number'] = (int) $new_instance['number'];
        $this->flush_widget_cache();

        $alloptions = wp_cache_get( 'alloptions', 'options' );
        if ( isset($alloptions['widget_my_custom_recent_entries']) )
            delete_option('widget_my_custom_recent_entries');

        return $instance;
    }

    function flush_widget_cache() {
        wp_cache_delete('widget_my_custom_recent_posts', 'widget');
    }

    function form( $instance ) {
        $title = isset($instance['title']) ? esc_attr($instance['title']) : '';
         if ( !isset($instance['fwd_posttype']) || !$fwd_posttype = $instance['fwd_posttype'] )
            $fwd_posttype = 'None Selected';
         if ( !isset($instance['number']) || !$number = (int) $instance['number'] )
            $number = 5;
?>
        <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>Select PostType<br>
        <select name="fwd_posttype">
            <option value=<?php echo $fwd_posttype?> > <?php echo $fwd_posttype ?> </option>
            <?php
            $args = array(
               'public'   => true,
               '_builtin' => false
            );

            $output = 'names'; // names or objects, note names is the default
            $operator = 'and'; // 'and' or 'or'

            $post_types = get_post_types( $args, $output, $operator ); 
            foreach ( $post_types  as $post_type ) {
              ?> <option value= <?php echo $post_type ;?> ><?php echo $post_type ;?></option>
              <?php
            }
            ?> 
        </select>
        </p>

        <p><label for="<?php echo $this->get_field_id('number'); ?>"><?php _e('Number of posts to show:'); ?></label>
        <input id="<?php echo $this->get_field_id('number'); ?>" name="<?php echo $this->get_field_name('number'); ?>" type="text" value="<?php echo $number; ?>" size="3" /></p>
<?php
    }
}

    register_widget('WP_Widget_My_Custom_Recent_Posts');
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