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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 |
|---|---|
| 1538 | } |
| 1539 | |
| 1540 | /** |
| 1541 | * Filters the header video URL. |
| 1542 | * |
| 1543 | * @since 4.7.3 |
| 1544 | * |
| 1545 | * @param string $url Header video URL, if available. |
| 1546 | */ |
| 1547 | $url = apply_filters( 'get_header_video_url', $url ); |
| 1548 | |
| 1549 | if ( ! $id && ! $url ) { |
| 1550 | return false; |
| 1551 | } |
| 1552 | |
| 1553 | return esc_url_raw( set_url_scheme( $url ) ); |
| 1554 | } |
| 1555 | |
| 1556 | /** |