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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 219 | * 'before_widget', and 'after_widget'. |
| 220 | * @param array $instance Settings for the current Text widget instance. |
| 221 | */ |
| 222 | public function widget( $args, $instance ) { |
| 223 | global $post; |
| 224 | |
| 225 | $title = ! empty( $instance['title'] ) ? $instance['title'] : ''; |
| 226 | |
| 227 | /** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */ |
| 228 | $title = apply_filters( 'widget_title', $title, $instance, $this->id_base ); |
| 229 | |
| 230 | $text = ! empty( $instance['text'] ) ? $instance['text'] : ''; |
| 231 | $is_visual_text_widget = ( ! empty( $instance['visual'] ) && ! empty( $instance['filter'] ) ); |
| 232 | |
| 233 | // In 4.8.0 only, visual Text widgets get filter=content, without visual prop; upgrade instance props just-in-time. |
| 234 | if ( ! $is_visual_text_widget ) { |
| 235 | $is_visual_text_widget = ( isset( $instance['filter'] ) && 'content' === $instance['filter'] ); |
| 236 | } |
| 237 | if ( $is_visual_text_widget ) { |