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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 |
|---|---|
| 43 | * 'before_widget', and 'after_widget'. |
| 44 | * @param array $instance Settings for the current Categories widget instance. |
| 45 | */ |
| 46 | public function widget( $args, $instance ) { |
| 47 | static $first_dropdown = true; |
| 48 | |
| 49 | $title = ! empty( $instance['title'] ) ? $instance['title'] : __( 'Categories' ); |
| 50 | |
| 51 | /** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */ |
| 52 | $title = apply_filters( 'widget_title', $title, $instance, $this->id_base ); |
| 53 | |
| 54 | $count = ! empty( $instance['count'] ) ? '1' : '0'; |
| 55 | $hierarchical = ! empty( $instance['hierarchical'] ) ? '1' : '0'; |
| 56 | $dropdown = ! empty( $instance['dropdown'] ) ? '1' : '0'; |
| 57 | |
| 58 | echo $args['before_widget']; |
| 59 | |
| 60 | if ( $title ) { |
| 61 | echo $args['before_title'] . $title . $args['after_title']; |