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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 |
|---|---|
| 1677 | } |
| 1678 | |
| 1679 | /** |
| 1680 | * Filters the header video URL. |
| 1681 | * |
| 1682 | * @since 4.7.3 |
| 1683 | * |
| 1684 | * @param string $url Header video URL, if available. |
| 1685 | */ |
| 1686 | $url = apply_filters( 'get_header_video_url', $url ); |
| 1687 | |
| 1688 | if ( ! $id && ! $url ) { |
| 1689 | return false; |
| 1690 | } |
| 1691 | |
| 1692 | return sanitize_url( set_url_scheme( $url ) ); |
| 1693 | } |
| 1694 | |
| 1695 | /** |