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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 |
|---|---|
| 855 | /** |
| 856 | * Filters whether a dynamic sidebar is considered "active". |
| 857 | * |
| 858 | * @since 3.9.0 |
| 859 | * |
| 860 | * @param bool $is_active_sidebar Whether or not the sidebar should be considered "active". |
| 861 | * In other words, whether the sidebar contains any widgets. |
| 862 | * @param int|string $index Index, name, or ID of the dynamic sidebar. |
| 863 | */ |
| 864 | return apply_filters( 'is_active_sidebar', $is_active_sidebar, $index ); |
| 865 | } |
| 866 | |
| 867 | // |
| 868 | // Internal Functions |
| 869 | // |
| 870 | |
| 871 | /** |
| 872 | * Retrieve full list of sidebars and their widget instance IDs. |
| 873 | * |