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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 |
|---|---|
| 1687 | /** |
| 1688 | * Filters whether the custom header video is eligible to show on the current page. |
| 1689 | * |
| 1690 | * @since 4.7.0 |
| 1691 | * |
| 1692 | * @param bool $show_video Whether the custom header video should be shown. Returns the value |
| 1693 | * of the theme setting for the `custom-header`'s `video-active-callback`. |
| 1694 | * If no callback is set, the default value is that of `is_front_page()`. |
| 1695 | */ |
| 1696 | return apply_filters( 'is_header_video_active', $show_video ); |
| 1697 | } |
| 1698 | |
| 1699 | /** |
| 1700 | * Retrieves the markup for a custom header. |
| 1701 | * |
| 1702 | * The container div will always be returned in the Customizer preview. |
| 1703 | * |
| 1704 | * @since 4.7.0 |
| 1705 | * |