Ticket #40907: apply-widget_text-filter-in-custom-html-widget.diff

src/wp-includes/default-filters.php

@@ -170 +170 @@
 add_filter( 'widget_text_content', 'convert_smilies',  20 );
 add_filter( 'widget_text_content', 'wpautop'              );
 
-add_filter( 'widget_custom_html_content', 'balanceTags' );
-
 add_filter( 'date_i18n', 'wp_maybe_decline_date' );
 
 // RSS filters

src/wp-includes/widgets/class-wp-widget-custom-html.php

@@ -61 +61 @@
                 /** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */
                 $title = apply_filters( 'widget_title', $instance['title'], $instance, $this->id_base );
 
-                $content = $instance['content'];
+                /** This filter is documented in wp-includes/widgets/class-wp-widget-text.php */
+                $content = apply_filters( 'widget_text', $instance['content'], $instance, $this );
 
                 /**
                  * Filters the content of the Custom HTML widget.

src/wp-includes/widgets/class-wp-widget-text.php

@@ -223 +223 @@
                  * @since 2.3.0
                  * @since 4.4.0 Added the `$this` parameter.
                  *
-                 * @param string         $text     The widget content.
-                 * @param array          $instance Array of settings for the current widget.
-                 * @param WP_Widget_Text $this     Current Text widget instance.
+                 * @param string                               $text     The widget content.
+                 * @param array                                $instance Array of settings for the current widget.
+                 * @param WP_Widget_Text|WP_Widget_Custom_HTML $this     Current Text widget instance.
                  */
                 $text = apply_filters( 'widget_text', $text, $instance, $this );