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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 |
|---|---|
| 1389 | ), |
| 1390 | ); |
| 1391 | |
| 1392 | if ( preg_match( '#^https?://(?:www\.)?(?:youtube\.com/watch|youtu\.be/)#', $video_url ) ) { |
| 1393 | $settings['mimeType'] = 'video/x-youtube'; |
| 1394 | } elseif ( ! empty( $video_type['type'] ) ) { |
| 1395 | $settings['mimeType'] = $video_type['type']; |
| 1396 | } |
| 1397 | |
| 1398 | return apply_filters( 'header_video_settings', $settings ); |
| 1399 | } |
| 1400 | |
| 1401 | /** |
| 1402 | * Check whether a custom header is set or not. |
| 1403 | * |
| 1404 | * @since 4.7.0 |
| 1405 | * |
| 1406 | * @return bool True if a custom header is set. False if not. |
| 1407 | */ |