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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.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 694 | } |
| 695 | } |
| 696 | } |
| 697 | |
| 698 | $sidebars_widgets = wp_get_sidebars_widgets(); |
| 699 | if ( empty( $wp_registered_sidebars[ $index ] ) || empty( $sidebars_widgets[ $index ] ) || ! is_array( $sidebars_widgets[ $index ] ) ) { |
| 700 | /** This action is documented in wp-includes/widget.php */ |
| 701 | do_action( 'dynamic_sidebar_before', $index, false ); |
| 702 | /** This action is documented in wp-includes/widget.php */ |
| 703 | do_action( 'dynamic_sidebar_after', $index, false ); |
| 704 | /** This filter is documented in wp-includes/widget.php */ |
| 705 | return apply_filters( 'dynamic_sidebar_has_widgets', false, $index ); |
| 706 | } |
| 707 | |
| 708 | $sidebar = $wp_registered_sidebars[ $index ]; |
| 709 | |
| 710 | $sidebar['before_sidebar'] = sprintf( $sidebar['before_sidebar'], $sidebar['id'], $sidebar['class'] ); |
| 711 | |
| 712 | /** |
| Line | Code |
| 843 | * Note: The action also fires for empty sidebars, and on both the front end |
| 844 | * and back end, including the Inactive Widgets sidebar on the Widgets screen. |
| 845 | * |
| 846 | * @since 3.9.0 |
| 847 | * |
| 848 | * @param int|string $index Index, name, or ID of the dynamic sidebar. |
| 849 | * @param bool $has_widgets Whether the sidebar is populated with widgets. |
| 850 | * Default true. |
| 851 | */ |
| 852 | do_action( 'dynamic_sidebar_after', $index, true ); |
| 853 | |
| 854 | /** |
| 855 | * Filters whether a sidebar has widgets. |
| 856 | * |
| 857 | * Note: The filter is also evaluated for empty sidebars, and on both the front end |
| 858 | * and back end, including the Inactive Widgets sidebar on the Widgets screen. |
| 859 | * |
| 860 | * @since 3.9.0 |
| 861 | * |