[wp-trac] [WordPress Trac] #53548: Widget Block: widget_id is undefined when a widget is placed

[WordPress Trac]

#53548: Widget Block: widget_id is undefined when a widget is placed
-------------------------------+-----------------------------
 Reporter:  subrataemfluence   |       Owner:  (none)
     Type:  defect (bug)       |      Status:  new
 Priority:  normal             |   Milestone:  5.8.1
Component:  Widgets            |     Version:  trunk
 Severity:  major              |  Resolution:
 Keywords:  reporter-feedback  |     Focuses:  administration
-------------------------------+-----------------------------

Comment (by subrataemfluence):

 As per your suggestion, I updated to 5.8-RC1 and the problem persists.
 I am still getting Undefined Index error against `$args['widget_id']`

 I am using a fresh 2021 theme and no additional plugin has been installed
 except Akismet.

 Here is my widget code:

 {{{#!php
 <?php
 class Quick_Periodic_Table extends WP_Widget {
    public $id_base = 'quick_periodic_table_id';

    public function __construct() {
       $widget_option   = array(
         'id' => $this->widget_id,
         'classname'   => 'quick_periodic_table_class',
         'description' => __( 'Place a periodic table ' ),
         'customize_selective_refresh' => true,
         'show_instance_in_rest'       => true,
       );

       $control_options = array(
         'width'   => '90%',
         'id_base' => $this->id_base,
       );

       parent::__construct(
         $this->id_base,
         __( 'Quick Periodic Table', 'qpt' ),
         $widget_option,
         $control_options
       );
    }

    ...

    public function widget( $args, $instance ) {
        extract( $args ); ?>
        <div id="<?= $args['widget_id'] ?>">
             // ...
        </div>
    <?php }

    ...
 }

 add_action( 'widgets_init', function(){
         register_widget( 'Quick_Periodic_Table' );
 } );
 }}}


 Replying to [comment:1 desrosj]:
 > Hi @subrataemfluence,
 >
 > Could you please retest using the beta4 release to see if this was
 resolved? Beta3 should be considered outdated at this point.

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/53548#comment:6>
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