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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 |
|---|---|
| 39 | */ |
| 40 | public function widget( $args, $instance ) { |
| 41 | // Get menu |
| 42 | $nav_menu = ! empty( $instance['nav_menu'] ) ? wp_get_nav_menu_object( $instance['nav_menu'] ) : false; |
| 43 | |
| 44 | if ( !$nav_menu ) |
| 45 | return; |
| 46 | |
| 47 | /** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */ |
| 48 | $instance['title'] = apply_filters( 'widget_title', empty( $instance['title'] ) ? '' : $instance['title'], $instance, $this->id_base ); |
| 49 | |
| 50 | echo $args['before_widget']; |
| 51 | |
| 52 | if ( !empty($instance['title']) ) |
| 53 | echo $args['before_title'] . $instance['title'] . $args['after_title']; |
| 54 | |
| 55 | $nav_menu_args = array( |
| 56 | 'fallback_cb' => '', |
| 57 | 'menu' => $nav_menu |