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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 |
|---|---|
| 1542 | /** |
| 1543 | * Modify whether the custom header video is eligible to show on the current page. |
| 1544 | * |
| 1545 | * @since 4.7.0 |
| 1546 | * |
| 1547 | * @param bool $show_video Whether the custom header video should be shown. Returns the value |
| 1548 | * of the theme setting for the `custom-header`'s `video-active-callback`. |
| 1549 | * If no callback is set, the default value is that of `is_front_page()`. |
| 1550 | */ |
| 1551 | return apply_filters( 'is_header_video_active', $show_video ); |
| 1552 | } |
| 1553 | |
| 1554 | /** |
| 1555 | * Retrieve the markup for a custom header. |
| 1556 | * |
| 1557 | * The container div will always be returned in the Customizer preview. |
| 1558 | * |
| 1559 | * @since 4.7.0 |
| 1560 | * |