[wp-trac] [WordPress Trac] #61792: PHP warning `Undefined array key "widget_id"` in legacy widget

[WordPress Trac]

#61792: PHP warning `Undefined array key "widget_id"` in legacy widget
--------------------------+-----------------------------
 Reporter:  rabmalin      |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Widgets       |    Version:
 Severity:  normal        |   Keywords:
  Focuses:                |
--------------------------+-----------------------------
 Related to https://core.trac.wordpress.org/ticket/53548

 In the ticket, it is mentioned that this issue has been fixed but I am
 still getting PHP notice in WP 6.6.1

 Log:

 {{{
 PHP Warning:  Undefined array key "widget_id" in /Users/****/plugins/my-
 widget-plugin/my-widget-plugin.php on line 29
 }}}

 This appears in log file whenever I go to Appearance -> Widgets in the
 admin panel with following plugin activated.

 This is the plugin code:
 {{{
 <?php
 /*
 Plugin Name: My Widget Plugin
 Description: A simple plugin to create a custom widget.
 Version: 1.0.0
 Author: John Doe
 */

 /**
  * Widget class.
  */
 class My_Custom_Widget extends WP_Widget {
         public function __construct() {
                 parent::__construct(
                         'my_custom_widget',
                         __( 'My Custom Widget', 'my-widget-plugin' ),
                         [ 'description' => __( 'A Custom Widget', 'my-
 widget-plugin' ) ]
                 );
         }

         // Front-end display of the widget
         public function widget( $args, $instance ) {
                 echo $args['before_widget'];

                 if ( ! empty( $instance['title'] ) ) {
                         echo $args['before_title'] . apply_filters(
 'widget_title', $instance['title'] ) . $args['after_title'];
                 }

                 var_dump( $args['widget_id'] );

                 echo $args['after_widget'];
         }

         public function form( $instance ) {
                 $title = ! empty( $instance['title'] ) ?
 $instance['title'] : __( 'New title', 'my-widget-plugin' );
                 ?>
                         <p>
                                 <label for="<?php echo esc_attr(
 $this->get_field_id( 'title' ) ); ?>"><?php _e( 'Title:', 'my-widget-
 plugin' ); ?></label>
                                 <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( $title ); ?>">
                         </p>
                 <?php
         }

         public function update( $new_instance, $old_instance ) {
                 $instance = [];

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

                 return $instance;
         }
 }

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

 }}}

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/61792>
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