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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 |
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626 | $index = $key; |
627 | break; |
628 | } |
629 | } |
630 | } |
631 |
|
632 | $sidebars_widgets = wp_get_sidebars_widgets(); |
633 | if ( empty( $wp_registered_sidebars[ $index ] ) || empty( $sidebars_widgets[ $index ] ) || ! is_array( $sidebars_widgets[ $index ] ) ) { |
634 | /** This action is documented in wp-includes/widget.php */ |
635 | do_action( 'dynamic_sidebar_before', $index, false ); |
636 | /** This action is documented in wp-includes/widget.php */ |
637 | do_action( 'dynamic_sidebar_after', $index, false ); |
638 | /** This filter is documented in wp-includes/widget.php */ |
639 | return apply_filters( 'dynamic_sidebar_has_widgets', false, $index ); |
640 | } |
641 |
|
642 | /** |
643 | * Fires before widgets are rendered in a dynamic sidebar. |
644 | * |
645 | * Note: The action also fires for empty sidebars, and on both the front end |
646 | * and back end, including the Inactive Widgets sidebar on the Widgets screen. |
647 | * |
648 | * @since 3.9.0 |
649 | * |
650 | * @param int|string $index Index, name, or ID of the dynamic sidebar. |
651 | * @param bool $has_widgets Whether the sidebar is populated with widgets. |
652 | * Default true. |
653 | */ |
654 | do_action( 'dynamic_sidebar_before', $index, true ); |
655 | $sidebar = $wp_registered_sidebars[$index]; |
656 |
|
657 | $did_one = false; |
658 | foreach ( (array) $sidebars_widgets[$index] as $id ) { |
659 |
|
660 | if ( !isset($wp_registered_widgets[$id]) ) continue; |
661 |
|
662 | $params = array_merge( |
663 | array( array_merge( $sidebar, array('widget_id' => $id, 'widget_name' => $wp_registered_widgets[$id]['name']) ) ), |